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혼합공정과 부착성장공정을 조합한 2단계 혐기 조합공정에서 palm oil mill effluent의 처리
신창하,손성민,정주영,박주양 대한상하수도학회 2013 상하수도학회지 Vol.27 No.1
Present study was conducted to evaluate the performance of Anaerobic Hybrid Reactor (AHR) combined with two types of anaerobic attached growth reactors at mesophilic temperature (37 °C). The reactor was operated at the influent substrate condition of 19,400 mg/L soluble chemical oxygen demand (sCOD). The organic loading rate (OLR) and flow rate were varied in the range of 9.5 ~ 22.5 kg/m3.day and 10.6 ~ 26.0 L/day respectively since start-up was done. The COD removal efficiency of 93 % was measured at the OLR of 14 kg/m3.day in AHR. However a reduction in removal efficiency to as low as 85 % could have been related to a combined effect of high concentration suspended solids (SS) concentration over 3,800 mg/L. On the other hand the total COD removal efficiencies were measured to be 96.3 % and 96.2 % for AHR+APF and AHR+ADF respectively. The pH of the POME was adjusted to neutral range by using sodium bicarbonate at the initial stages of the reactor feed, later stages pH adjustment was not required as the pH was maintained in the desired neutral range due to self-buffering capacity of the reactor. The reactor proved to be economically acceptable and operationally stable. The biogas was measured to have CH4 and CO2 with a ratio of 35:65, and methane gas production rate was estimated to be 0.17 ~ 10.269 L CH4/g CODremoved.
유기물 부하가 Anaerobic Hybrid Reactor 운전효율에 미치는 영향
신창하,오대양,김태훈,박주양 대한상하수도학회 2012 상하수도학회지 Vol.26 No.4
Anaerobic Digestion Process is evaluated as efficient wastewater treatment process with the removal of high concentrations of organic waste and production of biogas. This study was performed using hybrid anaerobic hybrid reactor (AHR) which consists of anaerobic sludge blanket (UASB) and biofilm-coated filter media was applied for Palm Oil Mill Effluent (POME) for 80 days to know optimum removal efficiency and production of biogas by comparing each part which divided changing Organic Loading Rate (OLR). As a result of this study, the removal efficiency was 90.4% when the organic loading rate of influent was 15 kg COD/m³/day. Since organic loading rate was up to 20 kg COD/m³/day, the removal rate declined 80.7%. Over loading of influent caused sludge expansion and overproduction of microorganism. Amount of biogas was collected 82.3 L/day and pH was remained 6.9 constantly with balance of alkalinity.