CAJ | 학술논문

采用SBR反应器,系统地研究不同质量浓度Zn(Ⅱ)长期作用对好氧颗粒污泥基本性能和污染物去除功效的影响。试验结果表明：当ρ(Zn(Ⅱ))≤5 mg/L时,Zn(Ⅱ)对好氧颗粒污泥基本性能与污染物去除功效影响较小；当ρ(Zn(Ⅱ))≥10 mg/L时,Zn(Ⅱ)会导致好氧颗粒污染物去除功效降低,混合液悬浮固体(MLSS)质量浓度、沉降速率、污泥粒径与结构发生改变。10 mg/L以上的Zn(Ⅱ)长期作用会导致污泥粒径变小,结构松散,进而导致污泥沉降性能变差,最终引起ρ(MLSS)下降。 Zn(Ⅱ)作用76 d后,投加10 mg/L 和15 mg/L Zn (Ⅱ)的反应器内NH+4-N、COD去除率分别减低为84.3%和75.1%、90.1%和85.7%；ρ( MLSS )分别降至3658 mg/L和3225 mg/L；SVI分别升高至94 mL/g和99 mL/g；颗粒污泥的平均粒径分别降至0.58 mm和0.37 mm,部分颗粒污泥解体。
채용SBR반응기,계통지연구불동질량농도Zn(Ⅱ)장기작용대호양과립오니기본성능화오염물거제공효적영향。시험결과표명：당ρ(Zn(Ⅱ))≤5 mg/L시,Zn(Ⅱ)대호양과립오니기본성능여오염물거제공효영향교소；당ρ(Zn(Ⅱ))≥10 mg/L시,Zn(Ⅱ)회도치호양과립오염물거제공효강저,혼합액현부고체(MLSS)질량농도、침강속솔、오니립경여결구발생개변。10 mg/L이상적Zn(Ⅱ)장기작용회도치오니립경변소,결구송산,진이도치오니침강성능변차,최종인기ρ(MLSS)하강。 Zn(Ⅱ)작용76 d후,투가10 mg/L 화15 mg/L Zn (Ⅱ)적반응기내NH+4-N、COD거제솔분별감저위84.3%화75.1%、90.1%화85.7%；ρ( MLSS )분별강지3658 mg/L화3225 mg/L；SVI분별승고지94 mL/g화99 mL/g；과립오니적평균립경분별강지0.58 mm화0.37 mm,부분과립오니해체。
The long-term effects of Zn(Ⅱ) on the properties and pollutant removal efficiencies of aerobic granular sludge in sequencing batch reactors ( SBR) were investigated systematically. The results show that Zn(Ⅱ) with a concentration less than or equal to 5 mg/L has a slight effect on the properties and pollutant removal efficiencies of aerobic granular sludge. When the concentration of Zn (Ⅱ) is greater than or equal to 10 mg/L, the pollutant removal efficiencies of the sludge are reduced, leading to variations of the mass concentration of mixed liquid suspended solids ( MLSS) and the sedimentation rate, granular size, and structure of the sludge. Along with the long-term effects of Zn(Ⅱ) , the average diameter of granules decreased, the sludge structure loosened, and the sedimentation ability deteriorated, which, finally, resulted in the decrease of the MLSS concentration. After 10 and 15 mg/L Zn (Ⅱ) were separately dosed for 76 days, the removal rates decreased to 84. 3% and 75. 1%, respectively, for NH+4 -N, and 90. 1% and 85. 7%, respectively, for COD; the MLSS concentration dropped to 3 658 and 3 225 mg/L, respectively;the sludge volume index ( SVI) increased to 94 and 99 mL/g, respectively;the average particle size decreased to 0. 58 and 0. 37 mm, respectively; and parts of the granular sludge disintegrated.