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  • 101.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Arbetsgruppen för deponigas, IEA1994Inngår i: RVF-nytt, ISSN 0284-1827, Vol. 8, nr 1, s. 32-33Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    Deponigasgruppen inom International Energy Agency består av forskare och experter inom deponigasonrådet från 7 länder, bl a Danmark, Norge och Sverige. En viktig uppgift för gruppen är att sammanställa data angående deponigasanläggningar i de olika länderna och speciellt hur deponigas kan användas för olika energiändamål. Sammanställningarna ingår i en internationell databas över deponigasanläggningar

  • 102.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Forskning och utbildning inom avfallsområdet vid Luleå tekniska universitet1997Inngår i: RVF-nytt, ISSN 0284-1827, nr 2, s. 47-48Artikkel i tidsskrift (Annet vitenskapelig)
  • 103.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Gassammansättning i upplag innehållande hushållsavfall: litteratur- och fältstudie1987Rapport (Annet vitenskapelig)
  • 104.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Internationell utblick inom upplagsteknik: beskrivning av gängse teknik och aktuell utveckling1989Rapport (Annet vitenskapelig)
  • 105.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Landfill dictionary1997Collection/Antologi (Annet vitenskapelig)
  • 106.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Landfill gas activity of the IEA bioenergy agreement1995Inngår i: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 9, nr 1-5, s. 399-413Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Landfill gas (LFG) is a renewable source of useful energy. Its world wide annual energy potential is in the range of a few hundred TWh. Today it is only marginally exploited. LFG is also an important contributor to the atmospheres CH4-content, it can be estimated to contribute about 25% of the methane coming from anthropogenic sources. In comparison to many other sources of methane emissions such as peat bogs, rice paddies, termites and sheep, landfills can be considered to be point sources, i.e. they are stationary and of limited extension. For this reason landfill gas (LFG) utilisation is one of the most cost effective ways to combat the greenhouse effect. The aim of the IEA activity on LFG is to promote information exchange and co-operation between national programmes in order to promote the proliferation of landfill gas utilisation. During the period 1992–1994 the LFG activity has had six participating countries: Canada, Denmark, Norway, The Netherlands, Sweden, UK and USA. In the past three-year period, the activity has been mainly directed towards establishing networks and obtaining an over-view of data related to LFG in the member countries. Numerous contacts have been established and perhaps of most importance for the future of the activity are the links towards organisations involved in the development of landfill technology, such as ISWA and SWANA. The gathering and evaluation of data within the LFG area from the member countries has resulted in a number of documents that are to be published within the near future. These documents cover information on LFG utilisation, landfill research, landfill gas potentials, landfill emission assessment and also non-technical barriers to LFG utilisation.

  • 107.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Landfill strategy1986Rapport (Annet vitenskapelig)
  • 108. Lagerkvist, Anders
    Landfill technology2001Annet (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    9th consecutive edition of the textbook for the Landfill technology course

  • 109.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Metangasutvinning, praktiska erfarenheter av styrd avfallsuppläggning: samordnad deponigas-fud. tvåstegs anaerob nedbrytning - en alternativ driftteknik vid avfallsupplag1991Inngår i: RVF:s tekniska möte 1991: vägval inför framtida avfallsbehandling, Borlänge 5-6 november 1991, 1991, s. J1-J14Konferansepaper (Annet vitenskapelig)
  • 110.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Om nedbrytnings- och transportprocesser i avfallsupplag1986Licentiatavhandling, monografi (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 111.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Styrd nedbrytning: modellstudier : delrapport 31987Rapport (Annet vitenskapelig)
  • 112.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Symposium om svensk upplagsforskning 19931993Collection/Antologi (Annet vitenskapelig)
  • 113.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Symposium om svensk upplagsforskning 19961996Collection/Antologi (Annet vitenskapelig)
  • 114.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    The coordinated Swedish test cell program 1990-19951998Inngår i: Svenskt symposium om upplagsforskning 1998: Third Swedish landfill research symposia 1998, 1998, s. 59-Konferansepaper (Annet vitenskapelig)
  • 115.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Tvåstegs anaerob nedbrytning: en alternativ behandlingsteknik för upplagt hushållsavfall1995Doktoravhandling, med artikler (Annet vitenskapelig)
    Fulltekst (pdf)
    FULLTEXT01
  • 116.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Upplagsstrategier: nuvarande praxis - framtida möjligheter1986Rapport (Annet vitenskapelig)
  • 117.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Utlakningsförsök med aska från sopförbränning1985Rapport (Annet vitenskapelig)
  • 118.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Utlakningsförsök med stoft från sopförbränning1985Rapport (Annet vitenskapelig)
  • 119.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Chen, Huiting
    Luleå University of Technology.
    Control of two step anaerobic degradation of municipal solid waste (MSW) by enzyme addition1993Inngår i: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 27, nr 2, s. 47-56Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The addition of cellulolytic enzymes to MSW has been tried under methanogenic and acidogenic conditions in 0.1 m3 landfill models. An enhanced degradation seems to follow the enzyme addition in both cases. During acidogenic conditions the observed conversion of cellulose was 42 and 29% respectively, with and without enzyme addition. The enzyme addition did not result in a change from methanogenic to acidogenic conditions. A similar conversion of VS can be achieved during methanogenic and acidogenic conditions; at the completion of this experiment the conversion of VS was in excess of 50% in the methanogenic models and somewhat lower than 40% in the acidogenic models (the latter still yielding strong leachates). The results of some standard waste-water analyses were compared and it is concluded that especially acid leachates may cause analytical problems.

  • 120.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Cossu, R.
    Leachate recirculation: concepts and applications2005Inngår i: SARDINIA 2005: Tenth International Waste Management and Landfill Symposium ; S. Margerita di Pula, Sardinia, Italy, 3 - 7 October 2005 / [ed] Raffaello Cossu, Cagliari: CISA, Environmental Sanitary Engineering Centre , 2005Konferansepaper (Fagfellevurdert)
    Abstract [sv]

    Återcirkulation av lakvatten kombinerar avfallsbehandling med lakvattenbehandling. Flera olika processer kan påverka lakvattenkvalitén vid återcirkulation såsom biologisk nedbrytning, utfällning, avsättning, adsorption och jonbyte. Samtidigt som vissa ämnen avlägsnas från lakvattnet löses ämnen i avfallet av lakvattnet. Syfte: Att belysa den intensifiering av olika processer som sker vid recirkulation av lakvatten samt diskutera möjliga tillämpningar. Resultat och slutsatser: Tillämpning av återcirkulation kan bl a medföra:Temperaturen i deponin kan sjunka vid kraftig återcirkulation av lakvatten.Förhöjt vatteninnehåll kan sänka nedbrytningshastigheten i deponin.Näringsämnen kan tillföras och fördelas.Mikroorganismer kan tillföras och/eller fördelas. Homogenisering av deponimiljön sker. Nedbrytbart organiskt material i lakvattnet kan brytas ned i deponin. Metanogent avfall i deponin kan kvarhålla metaller, fosfor och svavel från t ex acidogent lakvatten. Denitrifikation kan erhållas vid återcirkulation.

  • 121.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Dahlén, Lisa
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Solid Waste Generation and Characterization2012Inngår i: Encyclopedia of Sustainability Science and Technology, New York: Encyclopedia of Global Archaeology/Springer Verlag, 2012, s. 10000-10013Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    Waste is generated in all processes. According to the laws of thermodynamics , materials and energy can be transformed but never destroyed. Even if material is substantially transformed, all matter which is introduced in any kind of process will come out of the process in exactly the same number of kilograms, either as products, by-products , or waste. Waste may be solid, liquid, or gaseous. In many cases, gaseous waste is a dominating outflow when processing solid matter. However, the focus in this article is on solid waste.Waste is often perceived as the remains from consumption. However, the major part of all solid waste is generated already by consumers' demand for products, i.e., before the products were consumed and thrown away. In general, the extraction of natural resources and industrial production processes produce massively more solid waste than the consumer products amount to, e.g., about 20 times according to European waste data [14]. As material flows through society, waste is formed in each step, as illustrated in Fig. 1. The material wastes can either end up in landfills or they can be dispersed in water, air, or soil. The dispersion in liquid phases typically exits the material from the waste management domain and turns it into pollution, albeit solid wastes can also form pollution, such as the floating plastic of the oceans.

  • 122.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Ecke, Holger
    Deponierungsstrategie, Versuchsfelder und die Zukunft1995Inngår i: Barbara-Gesprächen: Geogen-Anthropogen, 1995Konferansepaper (Annet vitenskapelig)
  • 123.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Ecke, Holger
    Landfill strategy, test-cells, and the future: initial investigations1996Inngår i: 19th Annual landfill gas symposium: March 19-21, 1996 : conference proceedings, Silver Spring, MD: Solid waste association of North America , 1996, s. 101-116Konferansepaper (Fagfellevurdert)
  • 124.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Forsberg, Thomas
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
    Maurice, Christian
    Kolbalanser vid testceller1996Inngår i: Symposium om svensk upplagsforskning 1996 / [ed] Anders Lagerkvist, Malmö: Svenska renhållningsverks-föreningens Service AB , 1996, s. 119-145Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Under periodenn 1992-94 har gasemissioner studerats vid testceller ingående i projektet "Samordnad deponigas-FUD" (i Malmö, Helsingborg och Upplands Bro). Syftet med dessa mätningar har varit att bestämma gasbildningen och gasutvinningens effektivitet i olika celler

  • 125.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Karlsson, Birgitta
    Integrerat transportsystem för källsorterat hushållsavfall1984Inngår i: Bygg & Teknik, ISSN 0281-658X, nr 5, s. 16-18Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 126.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Karlsson, Birgitta
    Luleå tekniska universitet.
    Integrerat transportsystem för källsorterat hushållsavfall: en konsekvensstudie1983Rapport (Annet vitenskapelig)
    Fulltekst (pdf)
    fulltext
  • 127.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Karlsson, Birgitta
    Renhållningens mål genom tiderna1984Inngår i: Bygg & Teknik, ISSN 0281-658X, nr 5, s. 34-35Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 128.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Kylefors, Katarina
    Luleå tekniska universitet.
    Bergman, Anders
    Luleå tekniska universitet.
    Aplicacion de una estrategia de gestion a los vertederos de residuos solidos1997Inngår i: Residuos: Revista Técnica, ISSN 1131-9526, Vol. 39, s. 14-16Artikkel i tidsskrift (Fagfellevurdert)
  • 129.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Lind, Bo
    Swedish Geotechnical Institute.
    Use of wood ash for road stabilisation2009Inngår i: Eleventh International Symposium on Environmental Issues and Waste Management in Energy and Mineral Production: SWEMP 2009, 2009Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The cementitious properties of many wood ashes makes them a potential stabilising agent for roads that can substitute cement. A test is presently performed using a 30% ash addition to natural soils for reinforcing a forestry road near Timrå, central Sweden. The bearing capacity of forestry roads in Sweden has become increasingly problematic in recent years, due to warmer winters, and in order to get timber out from the forests, road stabilisation is needed, usually adding cement to the road body. Wood ash has similar properties, and may substitute cement. An added advantage of using wood ash is the saving of landfill space. In the ongoing study, laboratory tests on leaching and mechanical stability, frost-sensitivity et c has been performed and a test road was built in June 2009, and will be monitored with regard to environmental impact and mechanical properties. The results so far indicate a strong stabilizing effect of ash additions to the road shoulder material.

    Fulltekst (pdf)
    FULLTEXT01
  • 130.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Maurice, Christian
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Landfill carbon balances1996Inngår i: The second Conference on environmental management technology and development: Johannesburg, SA, 7-8 October, South African Institution of Civil Engineers , 1996Konferansepaper (Fagfellevurdert)
  • 131.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Pelkonen, Markku
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Wikström, Tommy
    Quick-start of full-scale anaerobic digestion (AD) using aeration2015Inngår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 38, s. 102-104Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A conventional 1300 m3 continuously stirred anaerobic tank reactor at the city of Boden, north Sweden, which was receiving a feed of both sewage sludge and food waste, was put out of operation due to the build-up of a float phase. The reactor was emptied and cleaned. At start-up there was no methanogenic sludge available, so an unconventional start-up procedure was applied: The reactor was rapidly (8 days with 1200 kg of total solids (TS) added daily) filled with thickened, and slightly acidic sewage sludge, showing only slight methane generation, which was subsequently heated to 55 °C. Then compressed air was blown into the digester and within a month a fully functional methanogenic culture was established. The transfer from acidogenic to methanogenic conditions happened in about one week. As a start-up technique this is fast and cost efficient, it only requires the access of a compressor, electricity and a source of air. In total, about 16 tonnes of oxygen were used. It is proposed that this method may also be used as an operational amendment technique, should a reactor tend to acidify.

  • 132.
    Lagerkvist, Anders
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Tham, G.
    Travar, Igor
    Andreas, Lale
    Ecke, Holger
    Use of ashes in landfill constructions2006Inngår i: VENICE 2006 - Biomass and Waste to Energy Symposium: Proceedings on CD, 2006Konferansepaper (Fagfellevurdert)
  • 133. Lidelöw, Sofia
    et al.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Environmental assessment of secondary construction materials: literature review2004Rapport (Annet vitenskapelig)
    Abstract [en]

    Process industry, construction and other comparable activities generate large quantities of wastes, which are potentially suitable for use in geotechnical applications. This review presents the current status of reuse and recycling of secondary construction materials in Sweden. Also, different assessment methods to judge the environmental suitability of different utilisations are overviewed. Several driving forces for reuse and recycling of wastes have been introduced recently. For example, the alternative costs, e.g. for landfilling, have increased due to raised taxes on waste deposited on landfills. However, the amounts of wastes made use of as construction materials are lower than the potential. Uncertainties about potential risks and demanding permit processes are often hindering recycling. Approval practices also vary in different regions, causing confusion for users as well as authorities. Wastes of high utilisation rates are commonly produced in urban areas where the demand for construction materials is high and are released from the permit obligation based on earlier experience. Current environmental assessment practice is unfavourable to the use of secondary materials. The surrounding environment is often not considered which may lead to environmental damage of sensitive recipients. The methods applied vary and the results are rarely related to corresponding investigations of conventional materials, although shown to have a high leachability of certain pollutants. The lack of a general procedure to assess the suitability of an intended use leads to inconsistent assessments. Laboratory leaching tests can be used to assess fundamental leaching properties of materials, but do not necessarily reflect the actual field conditions. Risk assessments can provide a link between the leaching behaviour of a material and the recipient/-s of concern, but requires large amounts of data. Life-cycle assessments can be used for comparative studies of different materials, but are often irrelevant for specific utilisation scenarios. Further work is needed on how to improve the quality and the consistency in environmental assessments. The effect of different factors on the release and transport of contaminants from different materials in different utilisation scenarios need to be evaluated. Also, simplified assessment methods are lacking to account for characteristics in the surrounding environment and to address resource management at the strategic level.

  • 134. Lidelöw, Sofia
    et al.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Evaluation of leachate emissions from crushed rock and municipal solid waste incineration bottom ash used in road construction2007Inngår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 27, nr 10, s. 1356-1365Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Three years of leachate emissions from municipal solid waste incineration bottom ash and crushed rock in a full-scale test road were evaluated. The impact of time, construction design, and climate on the emissions was studied, and the predicted release from standard leaching tests was compared with the measured release from the road. The main pollutants and their respective concentrations in leachate from the roadside slope were Al (12.8-85.3 mg l-1), Cr (2-125 μg l-1), and Cu (0.15-1.9 mg l-1) in ash leachate and Zn (1-780 μg l-1) in crushed rock leachate. From the ash, the initial Cl- release was high (≈20 g l-1). After three years, the amount of Cu and Cl- was in the same range in both leachates, while that of Al and Cr still was more than one order of magnitude higher in ash leachate. Generally, the release was faster from material in the uncovered slopes than below the pavement. Whether the road was asphalted or not, however, had minor impacts on the leachate quality. During rain events, diluted leachates with respect to, e.g., salts were observed. The leaching tests failed to simulate field leaching from the crushed rock, whereas better agreement was observed for the ash. Comparisons of constituent release from bottom ash and conventional materials solely based on such tests should be avoided.

  • 135. Lidelöw, Sofia
    et al.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Evaluation of leachate emissions from municipal solid waste incineration bottom ash and crushed rock used in road construction2005Inngår i: BCRA Workshop : Recycled materials in road and airfield pavements - overcoming barriers, 2005Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The use of municipal solid waste incineration (MSWI) bottom ash in road construction may possess a risk to the environment due to the release of e.g. salt and heavy metals. In this study, two years of leachate data from a test road built of MSWI bottom ash and crushed rock in northern Sweden were evaluated. It was found that Cu, Cr, Al, Na, and Cl- were leached in higher amounts from the bottom ash, while the release of Zn, Mg, Ba, and Ca was higher from the crushed rock. The difference between ash and crushed rock leachates decreased over time, mainly due to changes in the ash leachate composition. The road pavement reduced the release rate of most pollutants from the bottom ash compared to the release from the uncovered parts of the road, whereas the release of pollutants from the crushed rock was less affected by the presence of a pavement.

    Fulltekst (pdf)
    FULLTEXT01
  • 136. Lidelöw, Sofia
    et al.
    Larsson, A.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Barriers for the use of secondary construction materials2003Inngår i: Sardinia 2003: Ninth International Waste Management and Landfill Symposium. CISA. 6 - 10 October 2003, S. Margherita di Pula (Cagliari), Sardinia, Italy, 2003Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The use of secondary materials in geotechnical applications is regarded as favourable but is often hindered by uncertainty about the potential environmental impact of the utilisation. In this paper, the main hurdles restricting the use of waste derived construction materials in Sweden are analysed, and means to overcome these are discussed. Standard test procedures and limit values for the assessment of environmental compliance of waste materials have not yet been established in the legislation. This has lead to confusion both for prospective users and for authorities. Also, a risk assessment system developed for the use of the secondary materials is lacking. Formalising the way data on e.g. material properties is collected and structured facilitates the judgement if and how a waste derived material can be used in a specific project. A web based information system could be used to gather, store and communicate information regarding secondary materials used for construction purposes. The proposed information system may form a basis for a simplified evaluation of risks related to the use.

  • 137.
    Lindmark, Johan
    et al.
    School of Business, Society and Engineering, Mälardalen University, Västerås.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Nilsson, Erik
    School of Business, Society and Engineering, Mälardalen University, Västerås.
    Carlsson, My
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Thorin, Eva
    School of Business, Society and Engineering, Mälardalen University, Västerås.
    Dahlquist, Erik
    School of Business, Society and Engineering, Mälardalen University, Västerås.
    Evaluating the Effects of Electroporation Pre-treatment on the Biogas Yield from Ley Crop Silage2014Inngår i: Applied Biochemistry and Biotechnology, ISSN 0273-2289, E-ISSN 1559-0291, Vol. 174, nr 7, s. 2616-2625Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Exploiting the full biogas potential of some types of biomass is challenging. The complex structures of lignocellulosic biomass are difficult to break down and thus require longer retention times for the nutrients to become biologically available. It is possible to increase the digestibility of the substrate by pre-treating the material before digestion. This paper explores a pre-treatment of ley crop silage that uses electrical fields, known as electroporation (EP). Different settings of the EP equipment were tested, and the results were analyzed using a batch digestion setup. The results show that it is possible to increase the biogas yield with 16 % by subjecting the substrates to 65 pulses at a field strength of 96 kV/cm corresponding to a total energy input of 259 Wh/kg volatile solid (VS). However, at 100 pulses, a lower field strength of 48 kV/cm and the same total energy input, no effects of the treatment were observed. The energy balance of the EP treatment suggests that the yield, in the form of methane, can be up to double the electrical energy input of the process.

  • 138.
    Lundeberg, Simon
    et al.
    Svenska Renhållningsverksföreningen.
    Ecke, Holger
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Biologisk behandling av avfall i Borås1998Rapport (Annet vitenskapelig)
  • 139.
    Luthbom, Karin
    et al.
    Luleå tekniska universitet.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Tools for landfill siting2003Inngår i: Sardinia 2003: Ninth International Waste Management and Landfill Symposium. CISA. 6 - 10 October 2003, S. Margherita di Pula (Cagliari), Sardinia, Italy, Cagliari, 2003Konferansepaper (Fagfellevurdert)
  • 140.
    Marklund, Erik
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Andreas, Lale
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Characterization and mechanical separation of organic matter in construction and demolition waste finesManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    Construction and demolition waste (CDW) amounts to a large fraction of produced waste. 37 %-58 % was found to be fines. Wood is a common building material in the Nordic countries, so CDW fines have a high organic content. Typically, CDW fines are landfilled, but due to the high content of total organic carbon (TOC), this is not allowed. In order to investigate potential treatments or uses of these fines, they were characterized, with focus on their organic content. The potential for mechanical separation was tested by sieving and by float-sink separation in water. The organic content is higher in the larger and lighter particles. Mechanical separation by particle size using a 10 mm screen is not likely to consistently produce an under sieve fraction with low TOC content (<10 %). After float-sink separation, the sink fraction still contains 9-42% volatile solids (VS). However, based on tests of biogas potential and respiration activity, the biological activity of the sink fraction can be considered low. This is confirmed by thermogravimetric analysis, showing an organic carbon (OC) content of only 1-2 %. The TOC (measured by CO2 formation) is up to nine times higher than the OC, indicating that the TOC is not a reliable assay to measure organic carbon. Further studies will show if screening up to 10 mm, or screening in combination with density separation can yield a low TOC fraction for landfilling.

  • 141.
    Marklund, Erik
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Andreas, Lale
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Float-sink separation of C&D waste: a case of treatment oriented waste characterization2017Inngår i: Sixteenth International Waste Management and Landfill Symposium: 2 -6 October 2017 S. Margherita di Pula, Cagliari, Italy, Italy, 2017Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Landfilling and waste incineration are two major waste management options. However, some wastes can,due to their carbon content,be unsuitable for neither of these systems. Therefore, there is aneed for methods to remove organic carbon from wastes. One of these wastesis the construction and demolition fines. In this paper, we investigate using water for separating the waste by density, to see if this is a suitable method for separating carbon-containingmaterials, both in lab and field scale tests. Results show that halfof the carbon (measured as volatile solids) can be separated. However, this method cannot be said to reliably produce a sink fraction that is suitable for landfilling, as it still contains too much organic materials.

  • 142.
    Marklund, Erik
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Andreas, Lale
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Float-sink separation of construction and demolition waste fines2018Inngår i: Detritus, ISSN 2611-4135, Vol. 3, s. 13-18Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Landfilling and waste incineration are two major waste management options. However, due to their carbon content, some wastes may be unsuitable for these systems. Therefore, methods capable of removing organic carbon from wastes should be identified. One of these wastes is represented by construction and demolition fines. In this paper, we investigate the use of water in separating the waste by density, to verify the suitability of this method in the separation of carbon-containing materials, both in lab and field scale tests. The results obtained show that half of the carbon (measured as volatile solids) can be separated. However, this method fails to reliably produce a sink fraction suitable for landfilling, as it continues to be characterized by an excessively high organic material content.

    Fulltekst (pdf)
    fulltext
  • 143.
    Marklund, Erik
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Andreas, Lale
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    The impacts of environments on waste: Part 1: The influence of thermal environments on organic wastesManuskript (preprint) (Annet vitenskapelig)
  • 144. Maurice, Christian
    et al.
    Bergman, Anders
    Luleå University of Technology.
    Ecke, Holger
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Utilization of ashes in landfill constructions2004Inngår i: The 3rd Intercontinental Landfill Research Symposium November 29th - December 2nd, 2004 in Toya, Hokkaido Japan / [ed] Morton Barlaz; Anders Lagerkvist; Toshihiko Matsuto, Hokkaido: Center for Applied Ethics and Philosophy, Hokkaido University, 2004, s. 133-Konferansepaper (Annet vitenskapelig)
  • 145.
    Maurice, Christian
    et al.
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Bergman, Anders
    Luleå tekniska universitet.
    Ecke, Holger
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Vegetation as a biological indicator for landfill gas emissions: initial investigations1995Inngår i: Sardinia 95: 5th International landfill symposium : Papers / [ed] Thomas H. Christensen, Cagliari: CISA, Environmental Sanitary Engineering Centre , 1995, Vol. 3, s. 481-494Konferansepaper (Fagfellevurdert)
  • 146. Maurice, Christian
    et al.
    Ettala, M.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Effect of leachate irrigation and LFG on short rotation tree plantations1997Inngår i: Sardinia 97: proceedings ; [13 - 17 October 1997, S. Margherita di Pula - Cagliari, Sardinia, Italy] / [ed] Thomas H. Christensen, Cagliari: CISA, Environmental Sanitary Engineering Centre , 1997, Vol. Vol. 4, s. 343-352Konferansepaper (Fagfellevurdert)
  • 147. Maurice, Christian
    et al.
    Kylefors, Katarina
    LTU.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Denitrification in constructed wetlands in cold climate regions: review2001Rapport (Annet vitenskapelig)
    Abstract [en]

    This literature study focuses on the feasibility of using constructed wetlands (CW) for denitrification of leachate at a local leachate treatment facility, in cold climate. Constructed wetlands have the advantage of requiring less maintenance and control compared with more sophisticated systems. They are also cheaper to run. Finely they are part of the natural nutrient cycle. The environmental factors identified as limiting factors for the constructed wetlands considered in this literature study, e.g. the leachate salinity and the climatic conditions, governed the design of the wetland and the choice of the vegetation. Denitrification is done by heterotrophic microorganisms living in the soil, in anaerobic conditions. They use decaying organic material as carbon source. The role of the plants in the constructed wetlands is to provide substrate to the microorganisms as well as the root system increases the surface available to bacterial colonisation. The cold and long winter sets high requirements on the constructed wetlands. It shortens the period when the bacteria are most efficient i.e. when the water is warm. It will lead to a short period of high activity and the load will have to be reduced during winter and eventually stopped. Subsurface flow systems filled with gravel appeared to be the best alternative. Baffles should be installed to force the water transport around the in constructed wetlands. To reduce the risks for short cuts of the water flow the inlet and outlet of the systems were placed at the bottom to avoid risks for freezing. A design with edges is also recommended to increase snow accumulation on the top of the constructed wetland. Local species were selected for their tolerance to salt and high nutrient content in the water.

  • 148. Maurice, Christian
    et al.
    Kylefors, Katarina
    Luleå tekniska universitet.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Results from a pilot constructed wetland for denitrification2001Inngår i: SARDINIA 2001: proceedings ; [1 - 5 October, S. Margerita di Pula - Cagliari, Sardinia, Italy] / [ed] Thomas Christensen; Raffaello Cossu; Rainer Stegmann, Cagliari: CISA, Environmental Sanitary Engineering Centre , 2001, Vol. 2: Leachate and landfill gas, s. 303-309Konferansepaper (Fagfellevurdert)
  • 149. Maurice, Christian
    et al.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Assessment of methane oxidation capacity of soils2004Inngår i: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 22, nr 1, s. 42-48Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Methane oxidation capacity of three soil matrices was assessed using a new method based on the pressure fall resulting from methane oxidation. The effects of incubation temperature, moisture and methane content on the oxidation capacity were studied. Parameters observed were non-methanotrophic oxygen consumption, methane assimilation, length of the lag period before steady pressure fall was reached, initial pressure fall and maximum pressure fall. Filling material taken from a biofilter was tested. The length of the lag period was an index of prior exposure of the soil to methane emissions. Incubation temperature of 30°C and soil moisture at the water-holding capacity were chosen to standardize the test. Oxygen depletion by non-methanotrophs varied between 40 and 60% of the total oxygen consumption while methane assimilation was at 40 to 50% of the total methane consumption.

  • 150. Maurice, Christian
    et al.
    Lagerkvist, Anders
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
    Carbonisation in fly ash and its effects on permeability1998Inngår i: Svenskt symposium om upplagsforskning 1998: Third Swedish landfill research symposia 1998, 1998, s. 147-148Konferansepaper (Annet vitenskapelig)
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