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Biodegradation of wastewater organic contaminants using Serratia sp. ISTVKR1 isolated from sewage sludge

Paper ID Volume ID Publish Year Pages File Format Full-Text
2884 140 2015 10 PDF Available
Title
Biodegradation of wastewater organic contaminants using Serratia sp. ISTVKR1 isolated from sewage sludge
Abstract

•Some xenobiotic organic compounds were detected in effluent of VK STP.•Serratia sp. strain ISTVKR1 isolated from sludge was used for biodegradation study.•Almost 12 fold COD reduction was attained after 240 h bacterial treatment.•Decrease in peak area of complex organic contaminants was observed after treatment.

Wastewater was collected from various stages and sewage sludge was collected from sludge bed of Vasant Kunj sewage treatment plant (VK STP) in the post-monsoon season. The treatment plant is based on extended aeration activated sludge (EAAS) process. Preliminary analysis of the wastewater and sewage sludge samples revealed 11.5 fold reduction in chemical oxygen demand (COD) of wastewater after treatment while GC–MS analysis showed the presence of bisphenol P (RT = 41.63), certain pharmaceuticals, pesticides, and industrial compounds in effluent and sewage sludge, thus indicating the need for further treatments before their discharge into the environment. One indigenous bacterial strain isolated from sewage sludge of VK STP and identified as Serratia sp. ISTVKR1 was used for biodegradation of wastewater contaminants. Preliminary analysis of bacterial treatment culture showed almost 12 fold COD removal after 240 h of treatment while the GC–MS analysis revealed removal of complex organic compounds like phosphoric acid triphenyl ester (RT = 30.017) and 4H-1-benzopyran-4-one, 2-(3,4-dimethoxyphenyl)-3,5-dihydroxy-7-methoxy- (RT = 45.36) and formation of simpler compounds like alcohols and aliphatic hydrocarbons such as 1-heptacosanol (RT = 32.66), docosane (RT = 34.18) and hexadecane (RT = 29.621). Results of the study indicate the efficient removal of wastewater organic contaminants by the isolated Serratia sp. ISTVKR1.

Keywords
EAAS, extended aeration activated sludge; WWTP, wastewater treatment plant; VK STP, Vasant Kunj sewage treatment plant; I, influent; AT, aeration tank; FST, final settling tank; E, effluent; S, sludge; EC, electrical conductivity; TDS, total dissolved sol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 102, 15 October 2015, Pages 115–124
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us