Abstract
Upflow anaerobic sludge blanket (UASB) reactor is one of anaerobic biological treatment was develop in late 1970’s. UASB reactor is suitable for the tropic areas because it has a high temperature about 20°-30°C. Domestic wastewater is divided into two types, namely black water and grey water. But in this case used domestic grey water. Grey water is household wastewater from showers, sinks and kitchen. Grey water has a total 75% of the domestic wastewater volume. The research was conducted in laboratory scale. This study performed a variation of Hydraulic Loading Rate (HLR) and the influent concentration. There were 25 reactors include 5 variations of influent concentration and 5 Hydraulic Loading Rate’s (HLR) variation. The research could asses BOD 5 and COD removal with treatment in UASB. Efficiency of BOD 5 removal by varying the influent concentration and HLR was about 38%-75% and COD was about 40%-77%. The lower concentration could be increase efficiency BOD 5 and COD removal. Influent concentration optimum occurred when middle concentration was about 840 mg/L COD and HLR optimum was 0,05 m 3 /m 2 /hour.
Highlights
Domestic wastewater is a major source of pollution causes water bodies in urban areas
According to Henze and Ledin (2001) domestic wastewater can be divided into two categories: wastewater from latrines or toilets is termed as fecal water or black water and domestic wastewater former washing and bathing water non outhouse kitchen waste
COD removal efficiency based on the variation of Hydraulic Loading Rate (HLR) reached 48.01%77.34% and is 39.71%-77.34% variation in concentration; allowance BOD5 based on variations of Hydraulic Loading Rate (HLR) which is 44.74%
Summary
Domestic wastewater is a major source of pollution causes water bodies in urban areas. According to Henze and Ledin (2001) domestic wastewater can be divided into two categories: wastewater from latrines or toilets is termed as fecal water or black water and domestic wastewater former washing and bathing water non outhouse kitchen waste (grey water). Black water and grey water have different properties and require different treatment. Domestic wastewater generally contains TSS, BOD5, COD, nitrogen, phosphorus, chloride E.coli and others. UASB is widely used to treat industrial wastewater and domestic with the relative high ration BOD : COD (Said, 2002). In UASB, the wastewater flows upward through anaerobic sludge layer/blanket slugde where biodegradation processes of organic matter takes place (Lettinga, 1991). The parameters used are BOD5 and COD in the influent concentration variation and HLR
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