정종민 박철희 이상협 김경일 심나타리아 2024-01-20T20:32:49Z 2024-01-20T20:32:49Z 2021-09-06 2009-10 1225-7672 https://pubs.kist.re.kr/handle/201004/132066 The reduction of excess activated sludge from petrochemical plant was investigated by the electro fenton (E-Fenton) process using electrogenerated hydroxyl radicals which lead to mineralization of activated sludge to CO2, water and inorganic ions. Factors affecting the disintegration efficiency of excess activated sludge in E-Fenton process were examined in terms of five criteria: pH, H2O2/Fe2+ molar ratio, current density, initial MLSS (mixed liquid suspended solids) concentration, H2O2 feeding mode. TSS and TCODcr reduction rate increased with the increasing H2O2/Fe2+ molar ratio and current density until 42 and 6.7 mA/cm2, respectively but further increase of H2O2/Fe2+ molar ratio and current density would reduce the reduction rate. On the other hand, as expected, increasing pH and initial MLSS concentration of activated sludge decreases TSS and TCODcr reduction rate. The E-Fenton process was gradually increased during first 30 minutes and then linearly proceed till 120 minutes. The optimal E-Fenton condition showed TSS (total suspended solids) reduction rate of 62∼63% and TCODcr (total chemical oxygen demand) reduction rate of 55∼56%. Molar ratio H2O2/Fe2+ = 42 was determined as optimal E-Fenton condition with initial Fe2+ dose of 5.4 mM; and current density of 6.7∼13.3 mA/cm2, initial MLSS of 7,600 mg/L and pH 2 were chosen as the most efficient E-Fenton condition. Korean 대한상하수도학회 전기펜톤공정을 이용한 석유화학공장 폐활성슬러지의 감량화 가능성 평가 A study on reduction of excess sludge in activated sludge system from a petrochemical plant using electro fenton process Article 2 상하수도학회지, v.23, no.5, pp.669 - 678 상하수도학회지 23 5 669 678 kci ART001385421 전기펜톤공정 pH H2O2/Fe2+ 몰농도비 전류밀도 고형물농도 H2O2 주입방법 electro fenton (E-Fenton) process pH H2O2/Fe2+ molar ratio current density MLSS H2O2 feeding mode