Study on Domestic Wastewater Treatment by Anaerobic Baffled Reactor Under Normal Temperature Conditions

Anaerobic baffled reactor(ABR) with four chambers for treating domestic wastewater was studied at normal temperature conditions.The results indicated that if the hydraulic retention time(HRT) was 3~15 h,the COD removal effect of the reactor gradually increased with the increase of HRT.When the hydraulic retention time was 12h or more,the COD removal rate reached more than 85%.In the range of volume load and influent COD concentration of the test,the COD removal effect changed little.The effluent COD and voltaic fatty acid(VFA) in each chamber was descended along chambers and the most of COD removal amount was in the first chambers.This indicated that acidity and methane separation occurred when using ABR to treat domestic wastewater.The experiment result showed the advantages and of the tertiary anaerobic reactor for treating organic contamination and its enormous potential and wide foreground.