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Reduction of the cadmium content in sanitary wastewater from Rönnskärsverken
2001 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The purpose of this work was to find a method that could reduce the content of cadmium in the sanitary wastewater from Rönnskärsverken. A first series of experiments was performed at the laboratory of the University. The method Coagulation-Precipitation was the first and only method used. Experiences using two different coagulants (alum and ferric chloride) were performed. Both coagulants proved to be effective, obtaining a removal of 96-98%. Using this method for this kind of wastewater, it is possible to remove turbidity together with the cadmium content. A second series of experiments was performed at the pumpstation P1 in the area of Rönnskärsverken, using a pilot plant and the results obtained supported the conclusions reached with the first series of experiments. The coagulant used was Alum. It was possible to conclude that the control of the parameters pH, dosage of coagulant and composition of the raw water, has a vital part in obtaining an optimum Coagulation-Precipitation process. The method Coagulation-Precipitation has shown to be an appropriate, rapid and simple treatment for such wastewater from a technical point of view. A removal between 76 and 94% of the Cd content was obtained and for the turbidity a reduction from 64 to 93% was achieved.

Place, publisher, year, edition, pages
2001.
Keyword [en]
Technology, Cadmium, coagulation-precipitation, turbidity
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-50148ISRN: LTU-EX--01/249--SELocal ID: 76d59e88-e9cf-4c1a-ab8d-02c9fa0acd12OAI: oai:DiVA.org:ltu-50148DiVA: diva2:1023505
Subject / course
Student thesis, at least 30 credits
Educational program
Chemical Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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