| Novel two stage bio-oxidation and chlorination process for high strength hazardous coal carbonization effluent. | |
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MedLine Citation:
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PMID: 21371822 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Effluent generated from coal carbonization to coke was characterized with high organic content, phenols, ammonium nitrogen, and cyanides. A full scale effluent treatment plant (ETP) working on the principle of single stage carbon-nitrogen bio-oxidation process (SSCNBP) revealed competition between heterotrophic and autotrophic bacteria in the bio-degradation and nitrification process. The effluent was pretreated in a stripper and further combined with other streams to treat in the SSCNBP. Laboratory studies were carried on process and stripped effluents in a bench scale model of ammonia stripper and a two stage bio-oxidation process. The free ammonia removal efficiency of stripper was in the range 70-89%. Bench scale studies of the two stage bio-oxidation process achieved a carbon-nitrogen reduction at 6 days hydraulic retention time (HRT) operating in an extended aeration mode. This paper addresses the studies on selection of a treatment process for removal of organic matter, phenols, cyanide and ammonia nitrogen. The treatment scheme comprising ammonia stripping (pretreatment) followed by the two stage bio-oxidation and chlorination process met the Indian Standards for discharge into Inland Surface Waters. This treatment process package offers a techno-economically viable treatment scheme to neuter hazardous effluent generated from coal carbonization process. |
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Authors:
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Pravin Manekar; Rima Biswas; Manikavasagam Karthik; Tapas Nandy |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-1 |
Journal Detail:
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Title: Journal of hazardous materials Volume: - ISSN: 1873-3336 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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Wastewater Technology Division, National Environmental Engineering Research Institute (Council of Scientific & Industrial Research, New Delhi), Nehru Marg, Nagpur 440020, India. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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