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

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Ibrahim Z, Amin MF, Yahya A, Aris A, Umor NA,

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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. This article was published in Water Sci Technol and referenced in Journal of Bioremediation & Biodegradation

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