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Optimization on thermophilic aerobic treatment of anaerobically digested palm oil mill effluent (POME)

Paper ID Volume ID Publish Year Pages File Format Full-Text
3731 184 2011 6 PDF Available
Title
Optimization on thermophilic aerobic treatment of anaerobically digested palm oil mill effluent (POME)
Abstract

This research is aimed at improving the thermophilic aerobic treatment system of anaerobically digested palm oil mill effluent (POME) through optimization of mixed liquor suspended solids (MLSS) at high concentration range for the first time besides other parameters of organic loading rate (OLR), dissolved oxygen (DO) concentrations and settling time. Chemical oxygen demand (COD), biochemical oxygen demand (BOD) and total suspended solids (TSS) removal ratios were measured as indicators of the system performance. Experimental results clearly indicate that MLSS and OLR are the crucial parameters in thermophilic aerobic treatment. Optimal COD, BOD and TSS removals up to 86%, 87% and 89%, respectively, were achieved with MLSS concentration and OLR of 27,000 mg/L and 2.5 g COD/(L day), respectively. More significantly, high MLSS concentration range which is yet to be reported was successfully applied and this has resulted in superior performance as compared to other thermophilic treatment studies. No significant improvement of the treatment efficiency was attained with DO concentration exceeding 5 mg/L and settling time up to 24 h. Hence, operation at DO concentration of 2 mg/L and settling time of 2 h gives a good compromise between effluent quality and system operating costs.

► The current research is aimed to improve thermophilic aerobic treatment system of anaerobically digested palm oil mill effluent (POME) through optimization of organic loading rate (OLR), mixed liquor suspended solids (MLSS), dissolved oxygen (DO) concentrations and settling time. ► High MLSS concentration range which has yet to be reported was successfully applied in this study ► The optimum operating conditions to achieve the highest COD, BOD and TSS removal efficiencies for the thermophilic aerobic treatment of anaerobically digested POME were successfully attained from the present study. ► In comparison with other thermophilic treatment system at equivalent OLR, greater TCOD removal efficiencies were achieved in the present investigation.

Keywords
Palm oil mill effluent (POME); Optimization; Sequencing batch reactor (SBR); Aerobic; Organic loading rate (OLR); Mixed liquor suspended solids (MLSS)
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Optimization on thermophilic aerobic treatment of anaerobically digested palm oil mill effluent (POME)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 55, Issue 3, 15 August 2011, Pages 193–198
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us