Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process.

Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Research Abstract Details 

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Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Abstract Text:

Sangchul Rho,Gil-Nam Nam,Jee-Young Shin,Deokjin Jahng,Sangchul Rho,Gil-Nam Nam,Jee-Young Shin,Deokjin Jahng,

A metabolic uncoupler, 3,3',4',5-tetrachlorosalicylanilide (TCS), was used to reduce excess sludge production in biological wastewater treatment processes. Batch experiments confirmed that 0.4 mg/l of TCS reduced the aerobic growth yield of activated sludge by over 60%. However, the growth yield remained virtually constant even at the increased concentrations of TCS when cultivations were carried out under the anoxic condition. Reduction of sludge production yield was confirmed in a laboratory-scale anoxic-oxic process operated for 6 months. However, it was found that ammonia oxidation efficiency was reduced by as much as 77% in the presence of 0.8 mg/l of TCS in the batch culture. Similar results were also obtained through batch inhibition tests with activated sludges and by bioluminescence assays using a recombinant Nitrosomonas europaea (pMJ217). Because of this inhibitory effect of TCS on nitrification, the TCS-fed continuous system failed to remove ammonia in the influent. When TCS feeding was stopped, the nitrification yield of the process was resumed. Therefore, it seems to be necessary to assess the nitrogen content of wastewater if TCS is used for reducing sludge generation.

Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Publishing Authors By Initials

S Rho,GN Nam,JY Shin,D Jahng,S Rho,GN Nam,JY Shin,D Jahng,

For similar waste management: water purification research abstracts see: waste management: water purification research

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Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of microbiology and biotechnology

VOLUME: 17

Page Numbers: 1183-90

Journal Abbreviation: J. Microbiol. Biotechnol.

ISSN: 1017-7825

DAY: 24

MONTH: Jul

YEAR: 2007

Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Information

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LANGUAGE: eng

NlmUniqueID: 9431852

Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Keywords Mesh Terms:

KEYWORDS: Water Purification

MESH TERMS: methods

Chemical & Substance for Abstract: Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process. Information

Substance Name: Nitrogen

Registry Number: 7727-37-9

Grant and Affiliation Information for Effect of 3,3',4',5-tetrachlorosalicylanilide on reduction of excess sludge and nitrogen removal in biological wastewater treatment process.

AFFILIATION: Department of Environmental Engineering and Biotechnology, Myongii University, Yonginshi 449-728, Korea.

Country: Korea (South)

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MEDLINETA: J Microbiol Biotechnol

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