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Application of UASB Reactor to Reduce the Concentration of BOD, COD and Phosphate in the Domestic Waste


Affiliations
1 Department of Environmental Engineering, Diponegoro University, Jalan Prof. Soedarto, SH., Semarang 50275, Indonesia
 

Pilot scale studies were conducted to investigate the contribution of the flow rate and the influence of the concentration on the function of upflow anaerobic sludge blanket (UASB) reactor in wastewater treatment of domestic greywater. In this study, the flowrates used were 2.5 L/hr, 1.67 L/hr, and 1.25 L/hr. On varying the concentration, the optimum processing conditions were obtained in the reactor with a high concentration for the efficiency reduction of biochemical oxygen demand (BOD) and chemical oxygen demand (COD) as 1440 mg/L for the COD and 667.8 mg/L for the BOD, with an average reduction of 84.15% for BOD and 76.32% for COD. Optimum efficiency of phosphate reduction was obtained in the reactor with the concentration being 0.3843 mg/L with an average value of 72.58%. In general, the optimum conditions were obtained at the lowest flow rate of 1.25 L/hr for all the parameters and the efficiency decreased with the average values of 83.32% for BOD, 73.31% for COD and 71.24% for the phosphate. The optimum values for the organic loading rate (OLR) of greywater was 8.71 kgCOD/m3.day with the optimum condition for the UASB reactor observed at the highest flow rate of 2.5 L/hr, the highest concentration 1440 mg/L COD at the hydraulic retention time of 4 hours, with an upflow velocity of 0.051 m/hour and temperature of 35°C.

Keywords

Domestic Wastewater, Greywater, UASB.
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  • Application of UASB Reactor to Reduce the Concentration of BOD, COD and Phosphate in the Domestic Waste

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Authors

Syafrudin
Department of Environmental Engineering, Diponegoro University, Jalan Prof. Soedarto, SH., Semarang 50275, Indonesia
G. Samudra
Department of Environmental Engineering, Diponegoro University, Jalan Prof. Soedarto, SH., Semarang 50275, Indonesia
Nur Syarafina
Department of Environmental Engineering, Diponegoro University, Jalan Prof. Soedarto, SH., Semarang 50275, Indonesia
Mochamad Arief Budihardjo
Department of Environmental Engineering, Diponegoro University, Jalan Prof. Soedarto, SH., Semarang 50275, Indonesia

Abstract


Pilot scale studies were conducted to investigate the contribution of the flow rate and the influence of the concentration on the function of upflow anaerobic sludge blanket (UASB) reactor in wastewater treatment of domestic greywater. In this study, the flowrates used were 2.5 L/hr, 1.67 L/hr, and 1.25 L/hr. On varying the concentration, the optimum processing conditions were obtained in the reactor with a high concentration for the efficiency reduction of biochemical oxygen demand (BOD) and chemical oxygen demand (COD) as 1440 mg/L for the COD and 667.8 mg/L for the BOD, with an average reduction of 84.15% for BOD and 76.32% for COD. Optimum efficiency of phosphate reduction was obtained in the reactor with the concentration being 0.3843 mg/L with an average value of 72.58%. In general, the optimum conditions were obtained at the lowest flow rate of 1.25 L/hr for all the parameters and the efficiency decreased with the average values of 83.32% for BOD, 73.31% for COD and 71.24% for the phosphate. The optimum values for the organic loading rate (OLR) of greywater was 8.71 kgCOD/m3.day with the optimum condition for the UASB reactor observed at the highest flow rate of 2.5 L/hr, the highest concentration 1440 mg/L COD at the hydraulic retention time of 4 hours, with an upflow velocity of 0.051 m/hour and temperature of 35°C.

Keywords


Domestic Wastewater, Greywater, UASB.

References