Abstract
Problem statement: Sago effluent contains large amount of organic material which has a potential to cause water pollution. In order to reduce this problem, an experiment was conducted to remove organic material from sago effluent using lab scale of Extended Aeration (EA) system. Approach: The EA system consisted of the combination of physical and biological treatment unit. For Physical Treatment Unit (PTU), the sago effluent was filtered using 710 μm mesh size filter. For Biological Treatment Unit (BTU), the effluent were mixed and aerated with activated sago sludge for 48 h. The treatment efficiency with respect to Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total Suspended Solid (TSS) removal were evaluated and compared with regulatory requirement by Department of Environment, Malaysia. Results: The result showed, the EA system could reduce BOD, COD and TSS up to 84, 87.8 and 73% respectively, however it did not comply with the regulatory requirement. Conclusion: This study suggested the EA system have potential to be apply on sago effluent, however it should be integrated with additional treatment unit to achieve the effluent quality standard.
Highlights
Extended Aeration (EA) system is a modified version of the activated sludge process whereby the effluent is maintained under long term Hydraulic Retention Time (HRT) and high concentration of Mixed Liquor Suspended Solid (MLSS)
The organism are starved and forced to degrade high organic substances in the effluent (Environmental Institute of Malaysia, 2007). This system has a potential to be apply on sago effluent treatment which contains high concentration of Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total Suspended Solid (TSS) (Savitha et al, 2009; Chew and Shim, 1993)
The removal percentage slightly increase to 77%, but decrease to 73% during the treatment process in Biological Treatment Unit (BTU)
Summary
EA system is a modified version of the activated sludge process whereby the effluent is maintained under long term Hydraulic Retention Time (HRT) and high concentration of Mixed Liquor Suspended Solid (MLSS). Under these conditions, the organism are starved and forced to degrade high organic substances in the effluent (Environmental Institute of Malaysia, 2007). The organism are starved and forced to degrade high organic substances in the effluent (Environmental Institute of Malaysia, 2007) This system has a potential to be apply on sago effluent treatment which contains high concentration of BOD, COD and TSS (Savitha et al, 2009; Chew and Shim, 1993).
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call