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Characterisation of microbial flocs formed from raw textile wastewater in aerobic biofilm reactor (ABR)

Ibrahim, Zaharah and Mohd. Amin, Mohamad Faiz and Yahya, Adibah and Aris, Azmi and Umor, Noor Azrimi and Muda, Khalida and Sofian, Nur Shalena (2009) Characterisation of microbial flocs formed from raw textile wastewater in aerobic biofilm reactor (ABR). Water Science & Technology, 60 (3). p. 683. ISSN 0273-1223

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Official URL: http://dx.doi.org/10.2166/wst.2009.440

Abstract

Microbial flocs formed from raw textile wastewater in a prototype Aerobic Biofilm Reactor (ABR) system were characterised and studied for their potential use in the treatment of textile wastewater. After 90-100 days of operation, microbial flocs of loose irregular structures were obtained from the reactor with good settling velocity of 33 m/h and sludge volume index (SVI) of 48.2 mL/g. Molecular analysis of the flocs using PCR-amplified 16S rDNA sequence showed 98% homology to those of Bacillus sp, Paenibacillus sp and Acromobacter sp. Detection of Ca(2+)(131 mg/g) and Fe(2+)(131 mg/g) using atomic absorption spectrometer might be implicated with the flocs formation. In addition, presence of Co(2+) and Ni(2+) were indicative of the flocs ability to accumulate at least a fraction of the metals' present in the wastewater. When the flocs were used for the treatment of raw textile wastewater, they showed good removal of COD and colour about 55% and 70% respectively, indicating their potential application.

Item Type:Article
Uncontrolled Keywords:aerobic biofilm reactor (ABR), COD, decolourisation, microbial flocs, raw textile wastewater, 16S rDNA
Subjects:G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions:Biosciences and Bioengineering (Formerly known)
ID Code:13250
Deposited By: Ms Zalinda Shuratman
Deposited On:28 Jul 2011 01:16
Last Modified:28 Jul 2011 01:16

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