CAJ | 학술논문

建立了模拟的SBR反应器,并研究了ZnO纳米颗粒(ZnO-NPs)对SBR活性污泥活性的影响.结果表明低浓度(10mg/L)ZnO-NPs对活性污泥活性无明显抑制作用.较高浓度下,ZnO-NPs对活性污泥沉降性能?呼吸速率?EPS和SMP产量及其组成?有机物降解效率等具有明显影响.20,50,100mg/L ZnO-NPs 使 COD 去除率分别降低8.1%,19.5%和27.7%,使污泥沉降性能分别降低24.2%,35.0%和36.0%,使MLVSS/MLSS比值分别降低8.0%,14.7%和21%,使活性污泥呼吸速率抑制率达到54.0%,79.0%和80.3%；使EPS产量分别降低29.0%,49.9%和65.4%,使SMP产量分别升高48.9%,102.6%和203.0%.研究表明,较高浓度ZnO-NPs能够抑制污泥代谢,降低活性污泥生物量,显著抑制活性污泥活性.
건립료모의적SBR반응기,병연구료ZnO납미과립(ZnO-NPs)대SBR활성오니활성적영향.결과표명저농도(10mg/L)ZnO-NPs대활성오니활성무명현억제작용.교고농도하,ZnO-NPs대활성오니침강성능?호흡속솔?EPS화SMP산량급기조성?유궤물강해효솔등구유명현영향.20,50,100mg/L ZnO-NPs 사 COD 거제솔분별강저8.1%,19.5%화27.7%,사오니침강성능분별강저24.2%,35.0%화36.0%,사MLVSS/MLSS비치분별강저8.0%,14.7%화21%,사활성오니호흡속솔억제솔체도54.0%,79.0%화80.3%；사EPS산량분별강저29.0%,49.9%화65.4%,사SMP산량분별승고48.9%,102.6%화203.0%.연구표명,교고농도ZnO-NPs능구억제오니대사,강저활성오니생물량,현저억제활성오니활성.
The impact of ZnO nanoparticles (ZnO-NPs) on the activity of activated sludge in SBR was investigated. Results indicated that no significantly adverse effects were discovered of ZnO-NPs in the activity of activated sludge at low exposure concentration (10mg/L). Adversely, significant effects were observed on the activities of the sludge such as sedimentation, yield and constituents of extracellular polymeric substances (EPS) and soluble microorganism products (SMP) as well as degradation efficiency of organics when ZnO-NPs was exposed to the activated sludge system at higher concentration (20,50,100mg/L). Namely, COD removal decreased by 8.1%, 19.5% and 27.7%, respectively, the sedimentation efficiency of sludge decreased by 24.2%, 35.0% and 36.0%, MLVSS/MLSS ratio decreased by 8.0%, 14.7%and 21.0%, the respiratory rate was inhibited by 54.0%, 79.0%and 80.3%;the yield of EPS decreased by 29.0%, 49.9%and 65.4%and the yield of SMP increased by 48.9%, 102.6%and 203.0%. The results demonstrated that ZnO-NPs could inhibit the activity of activated sludge by suppressing the metabolism and yield of sludge.