Bafana, Amit and Kumar, Gulshan and Kashyap, S M and Kanade, Gajanan and Shind, Vilas M (2015) Dynamics of effluent treatment plant during commissioning of activated sludge process unit. Environmental Science and Pollution Research , 22 (5). pp. 3538-3546. ISSN 0944-1344

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Abstract

Industrial effluent treatment plants (ETPs) are very important in protecting the environment and different life forms from harmful industrial waste. Hence, the efficiency of ETPs must be regularly monitored, particularly after major repair or replacement work. Present study evaluated the performance of an ETP over a period of 4 months, during which aeration tank (T1) of the activated sludge unit was replaced with a new one (T2). System had to be maintained operational during this transition, which warranted close monitoring of the system performance due to the daily load of hazardous industrial wastewater. Analysis showed that the raw wastewater was highly variable in composition and contained many hazardous organic and inorganic pollutants, such as heavy metals,bisphenol A and cyanoacetylurea. It showed significant toxicity against HepG2 cells in vitro. However, the ETP was found to successfully treat and detoxify the wastewater.Denaturing gradient gel electrophoresis (DGGE) analysis showed large temporal fluctuations in the ETP microbial community, which is consistent with the variable composition of wastewater. It indicated that functional stability of the ETP was not associated with stability of the microbial community, probably due to high microbial biodiversity and consequently high functional redundancy. In conclusion, the CETP showed consistent level of detoxification and microbial community dynamics after switching to T2, indicating successful development,acclimatization and commissioning of T2.

Item Type:	Article
Uncontrolled Keywords:	ETP; DGGE; Principal Component Analysis; GC-MS; Toxicity
Subjects:	Environmental Health
Divisions:	UNSPECIFIED
Depositing User:	Mr S M Kashyap
Date Deposited:	09 Apr 2015 12:02
Last Modified:	09 Apr 2015 12:02
URI:	http://neeri.csircentral.net/id/eprint/547

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