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Impact of the herbicide (RS)-MCPP on an anaerobic membrane bioreactor performance under different COD/nitrate ratios

Yuzir, Ali and Chelliapan, Shreeshivadasan and Sallis, Paul J. (2012) Impact of the herbicide (RS)-MCPP on an anaerobic membrane bioreactor performance under different COD/nitrate ratios. Bioresource Technology, 109 . pp. 31-37. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2012.01.038

Abstract

The degradation of (RS)-MCPP was investigated in an anaerobic membrane bioreactor (AnMBR) using nitrate as an available electron acceptor under different COD/NO3--N ratios. Results showed high soluble COD removal efficiency (80-93%) when the reactor was operated at high COD/NO3--N ratios. However, the COD removal started to decline (average 15%) at high nitrate concentrations coinciding with a drop in nitrate removal efficiency to 37%, suggesting that the denitrification activity dropped and affected the AnMBR performance when nitrate was the predominant electron acceptor. Additionally, the removal efficiency of (RS)-MCPP increased from 2% to 47% with reducing COD/NO3--N ratios, whilst the (RS)-MCPP specific utilisation rate (SUR) was inversely proportional to the COD/NO3- - N ratio, suggesting that a lower COD/NO3- - N ratios had a positive influence on the (RS)-MCPP SUR. Although nitrate had a major impact on methane production rates, the methane composition was stable (approximately 80%) for COD/NO3- - N ratios of 23 or more.

Item Type:Article
Uncontrolled Keywords:anaerobic membrane bioreactor, mecoprop, herbicide, COD/nitrate ratios
Subjects:T Technology > TP Chemical technology
Divisions:Civil Engineering
ID Code:47078
Deposited By: Narimah Nawil
Deposited On:22 Jun 2015 05:56
Last Modified:28 Jan 2019 03:54

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