Y Sanayei - School of Industrial Technology, Environmental Technology Division, University Sains Malaysia, Pulau Pinang, ۱۱۸۰۰, Malaysia
N.B Ismail - School of Industrial Technology, Environmental Technology Division, University Sains Malaysia, Pulau Pinang, ۱۱۸۰۰, Malaysia
T. Ch. Siew Norhashima - School of Industrial Technology, Environmental Technology Division, University Sains Malaysia, Pulau Pinang, ۱۱۸۰۰, Malaysia

Textile dying processes that produce colored effluents have a place a mong the less environmentally friendly industrial techniques. The bioflocculant was effective in flocculating a kind of reactive soluble dyes (Cibacron yellow FN-2R) in aqueous solution. A bioflocculsnt-producing bacterium were isolated from wastewater and sediments of Close Drainage Systems (CDS) located at the Prai industrial area.. Compared with conventional chemical flocculants, bioflocculants are biodegradable and nontoxic, and produce no secondary pollution. Sphingomonas paucimobilis was found to produce a bioflocculant with high flocculating activity for Kaolin suspension and water-soluble dyes. The best temperature flocculation performance was 35C , initial pH 5-6 and shaking speed of 160 rpm. The highest flocculating efficiency achieved for Kaolin suspension was 98.4% at 350C, after 48 hours cultivation.. Various culture temperature were tested between 2 hours in order to investigate their effect on the bioflocculant production when the culture temperature was 35C° which the flocculating activity of Sphingomonas paucimobilis was up to 98.4% According to results, flocculating rate will vary respect to time and temperatures. Determination flocculating activity was shown Sphingomonas paucimobilis is biodegradable and increase in number of bacteria during the time will confirm that. This study was conducted to biologically treat wastewater discharged from the textile industry using sequencing batch reactor (SBR) technology biological flocculation on COD removal and effects of solids detention times and MLVSS on EPS production.

Bioflocculant, Dye Waste Water, Sphingomonas Paucimobilis, Flocculating Activity