Hydrolyzed molasses as an external carbon source in biological nitrogen removal

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Hydrolyzed molasses was evaluated as an alternative carbon source in a biological nitrogen removal process. To increase biodegradability, molasses was acidified before thermohydrolyzation. The denitrification rate was 2.9-3.6 mg N/g VSS h with hydrolyzed molasses, in which the percentage of readily biodegradable substrate was 47.5%. To consider the hydrolysate as a carbon source, a sequencing batch reactor (SBR) was chosen to treat artificial municipal wastewater. During the 14 days (28 cycles) of operation, the SBR using hydrolyzed molasses as a carbon source showed 91.6 +/- 1.6% nitrogen removal, which was higher than that using methanol (85.3 +/- 2.0%) The results show that hydrolyzed molasses can be an economical and effective external carbon source for the nitrogen removal process. (c) 2005 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2005-10
Language
English
Article Type
Article
Keywords

SEQUENCING BATCH REACTORS; NUTRIENT REMOVAL; WASTE-WATER; ACTIVATED-SLUDGE; BIOFILM REACTOR; ACETIC-ACID; DENITRIFICATION; METHANOL; CAPACITY; KINETICS

Citation

BIORESOURCE TECHNOLOGY, v.96, pp.1690 - 1695

ISSN
0960-8524
DOI
10.1016/j.biortech.2004.12.033
URI
http://hdl.handle.net/10203/90198
Appears in Collection
BS-Journal Papers(저널논문)
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