| Treatment of high-strength pet food wastewater using two-stage membrane bioreactors. | |
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MedLine Citation:
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PMID: 16929635 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A two-stage membrane bioreactor was used to treat dissolved-air-flotation pretreated, high-strength pet food wastewater characterized by oil and grease concentrations of 50 000 to 82 000 mg/L and total chemical oxygen demand (COD) and five-day biochemical oxygen demand (BOD5) concentrations of 100 000 and 80 000 mg/L, respectively, to meet stringent surface discharge criteria (i.e., BOD5, total suspended solids [TSS], and ammonium-nitrogen [NH4(+)-N] of < 10 mg/L at an overall hydraulic retention time of 6.3 days). Organic contaminants were removed primarily in the first stage, followed by almost complete removal of ammonia in the second stage. Despite a rise in poorly biodegradable COD in the second stage, overall removal of TSS, BOD5, COD, and ammonia was 100, 99.9, 95.2, and 99.7%, respectively, thus readily achieving the required criteria. Consistent nitrite accumulation over a period of more than 100 days, even at dissolved oxygen concentrations of more than 2.5 mg/L, was remarkable. A residual alkalinity requirement for nitrification was quantified. Membrane performance was extensively studied in this work. |
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Authors:
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C Acharya; G Nakhla; A Bassi; R Kurian |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Water environment research : a research publication of the Water Environment Federation Volume: 78 ISSN: 1061-4303 ISO Abbreviation: Water Environ. Res. Publication Date: 2006 Jul |
Date Detail:
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Created Date: 2006-08-25 Completed Date: 2006-12-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9886167 Medline TA: Water Environ Res Country: United States |
Other Details:
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Languages: eng Pagination: 661-70 Citation Subset: IM |
Affiliation:
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Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed* Animals Animals, Domestic Bioreactors* Membranes, Artificial* Nitrites / metabolism Oxygen / metabolism Waste Disposal, Fluid / methods* Water Purification |
| Chemical | |
Reg. No./Substance:
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0/Membranes, Artificial; 0/Nitrites; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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