Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F10%3APU91215" target="_blank" >RIV/00216305:26110/10:PU91215 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Wastewater from Biodiesel Production as a Carbon Source for Denitrification of Sludge Liquor in SBR
Original language description
Sludge liquor from an anaerobic sludge digester with an average N-NH4 mass concentration of = 1185 mg.L-1 was treated in a pilot-scale SBR (sequencing batch reactor) system. The returned activated sludge of a WWTP was used as inoculum. The average efficiency of N-NH4 removal was over = 90%. Mass concentrations of N-NH4 in the effluent were typically below 10 mg.L-1. The maximal achieved nitrification rate was rN = 9.1 mg.g-1.h-1 (relative to MLVSS). Wastewater of methyl ester wash arising during biodiesel production was used as an external carbon source for denitrification. A dosage of 3.5 - 4.5 g of COD per 1 g of nitrogen available for denitrification was found optimal. Typical effluent N-NO3 mass concentration was about = 25 mg.L-1 and maximal achieved denitrification rate was rD = 14.5 mg.g.h-1. Operation of the SBR was stable at a HRT of = 4 - 5 days.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DJ - Pollution and water control
OECD FORD branch
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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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