Abstract - Use of natural bacteria to accelerate the extended


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	Publications of MRB Latest Publications MRB Digest Journal of Rubber Research 3^rd Qtr 2008 Vol 11(3) 2^nd Qtr 2008 Vol 11(2) 1^st Qtr 2008 Vol 11(1) 4^th Qtr 2007 Vol 10(4) 3^rd Qtr 2007 Vol 10(3) 2^nd Qtr 2007 Vol 10(2) 1^st Qtr 2007 Vol 10(1) 1^st Qtr 2006 Vol 9(1) 2^nd Qtr 2006 Vol 9(2) 3^rd Qtr 2006 Vol 9(3) 4^th Qtr 2006 Vol 9(4) Submit paper/article Order Form	Abstract Use of Natural Bacteria to Accelerate the Extended Aeration Treatment of Processed Latex Effluent Processed latex effluent normally contains high biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammoniacal nitrogen (AN) and suspended solids (SS). The efficiency of coupling bioaugmentation and extended aeration methods in reducing the BOD, COD and SS in processed latex effluent was investigated. The coupled methods were run at two hydraulic retention time (HRT), i.e. 20 h and 24 h using 22 mg/l of microorganism that specifically feeds on hydrocarbon which succeeded in significantly reducing the pollutant load of latex. Analysis after treatment revealed a high percentage removal of the three parameters exceeding could only reduce the BOD from 679 ± 0.5. Likewise the COD was assuaged from 1359 ± 9 to 23.8 ± 2.2 and 1355.3 ± 2.9 to 35.2 ± 1.6 at 24 h and 20 h HRTs, respectively using the coupled treatment. Without bioaugmentation process, the COD was only reduced from 1359 ± 1 to 288 ± 0.7. At 24 h HRT, the SS was lowered from 251 ± 1.5 to 10.5 ± 1.5, slightly better than the reduction achieved at 20 h HRT which was reduced from 245.2 ± 2.2 to 14.4 ± 0.4. Without addition of the specific bacteria, the SS was only successfully reduced from 247 ± 0.3 to 54 ± 0.9. Bioaugmentation and extended aeration working simultaneously proved to be more than 17% ± 2.6% efficient for SS, BOD and COD removal.
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