Impact of herbicide Ametryn on microbial communities in mixed liquor of a membrane bioreactor (MBR)

Navaratna, Dimuth, Elliman, Jennifer, Cooper, Alanna, Shu, Li, Baskaran, Kanagaratnam, and Jegatheesan, Veeriah (2012) Impact of herbicide Ametryn on microbial communities in mixed liquor of a membrane bioreactor (MBR). Bioresource Technology, 113. pp. 181-190.

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Abstract

Ametryn, which is a second generation herbicide, was introduced to a lab-scale MBR at a concentration of 1 mg/L and a 20–40% removal was observed at HRT ranging from 7.8 to 15.6 h for an average influent Ametryn concentration of 0.8 mg/L. Components of EPS (protein and carbohydrates) increased in the bioreactor and the observed biomass production reduced after the addition of Ametryn. In a batch study, GAC was added to MBR mixed liquor and removal of Ametryn via biodegradation and adsorption were measured. Five common bacterial colony types (Gram negative and positive bacilli and Gram negative cocci) were identified and three of these were resistant to Ametryn up to 5 mg/L. GAC was found to be a very effective Ametryn adsorption medium and in some occasions Ametryn may have acted as a nutrient source for bacteria.

Item ID: 20938
Item Type: Article (Refereed Research - C1)
Keywords: membrane bioreactor, extra-cellular polymeric substances, granular activated carbon, Ametryn, bacterial communities
ISSN: 1873-2976
Date Deposited: 13 Mar 2012 06:00
FoR Codes: 06 BIOLOGICAL SCIENCES > 0605 Microbiology > 060501 Bacteriology @ 50%
09 ENGINEERING > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes @ 50%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management @ 100%
Citation Count from Web of Science Web of Science 2
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