Optimization of Aeration Time on GAS-SBR System to Remove Organic Content in Wastewater A Nareswari1, Tazkiaturrizki1, R Hadisoebroto1*)
Department of Environmental Engineering, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia
Abstract
In general, chicken slaughterhouses have slaughtering capacity of more than 40,000 chickens per day, resulting in high volume wastewater with high BOD and COD concentration. Therefore appropriate wastewater treatment technology is needed. Granular Activated Sludge that uses Sequencing Batch Reactor (GAS-SBR) has ability to treat wastewater with high organic content. The study is conducted to analyze the ability of GAS to reduce organic content with variation of aeration time in reaction stage on SBR. Formation of Granular Activated Sludge (GAS) was cultured by reacting activated sludge and using a stirring of 20 rpm. SBR has a total work volume of 45 liters and is operated in 5 stages, namely the filling, the reaction with aeration, the settling, the decantation, and the stabilization stage. In this study the initial COD concentration in chicken slaughterhouse effluent (RPA) was 5440 mg/L. The result of the study was that highest removal of BOD and TSS parameter occured at 3 hours aeration time, while for COD was at 4 hours aeration time. It could be concluded that GAS in SBR system could be applied to remove high organic content parameters in wastewater.
