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Iranian Journal of Chemistry and Chemical Engineering، جلد ۲۱، شماره ۲، صفحات ۱۱۰-۱۱۷
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عنوان انگلیسی Effect of Metal Salt Coagulants on Treatment of Activated Sludge Effluent in Sulfite Mill Pulp and Paper Plant
چکیده انگلیسی مقاله Pulp and paper effluents are considered as serious environmental hazards and their treatment, because of multiplicity of impurities and complexity of their chemical structures, is one of the most difficult and inconvenient industrial processes. As the most pulp and paper mill work on kraft process, there are few studies in literature on the treatment of neural sulfite semi chemical (NSSC) process effluents. Sulfate lignin (SL) is the main concern of kraft process while lignosulphanates (LS) are primary concern for NSSC process. The high charge density of LS in the side range of pH makes it more stable than SL. This experimental study examined the effect of metal salt coagulants (Alum, poly aluminium chloride, aluminum chloride and ferric chloride) on the treatment of activated sludge effluent in NSSC process used in Mazandaran pulp and paper industry. These coagulants were able to remove colour, turbidity and COD of the waste water up to 90, 95 and 70%, respectively. Results show that ferric chloride has the best performance among coagulants studied here. This feature of ferric chloride supports the idea that the Fe is more amenable to hydrolysis than Al.
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نویسندگان مقاله محمد چالکش امیری | chalkosh amiri
department of chemical engineering, isfahan university of technology, isfahan, i.r. iran
سازمان اصلی تایید شده: دانشگاه صنعتی اصفهان (Isfahan university of technology)

شعبان قدبنان |
department of chemical engineering, isfahan university of technology, isfahan, i.r. iran
سازمان اصلی تایید شده: دانشگاه صنعتی اصفهان (Isfahan university of technology)

نشانی اینترنتی http://www.ijcce.ac.ir/article_9621_273e75aac8c91cca00fb92049ebae4f5.pdf
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