纳米银对EBPR系统生物除磷效能的影响  

Effect of Nanosilver on Biological Phosphorus Removal Efficiency of EBPR System

作　　者：王家伟 孙洪伟 WANG Jia-wei;SUN Hong-wei(School of Environmental and Material Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]烟台大学环境与材料工程学院,山东烟台264005

出　　处：《烟台大学学报（自然科学与工程版）》2023年第2期242-247,共6页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：山东省自然科学基金资助项目(ZR2020ME226)。

摘　　要：通过设置不同质量浓度的纳米银,在SBR中模拟EBPR工艺流程。通过短、长期暴露,探究系统中SOP、COD等指标的变化,以此来研究纳米银对EBPR系统除磷效能的影响。短期试验中,纳米银质量浓度(ρ_(Ag))低于4 mg/L时,对厌氧段无明显影响;高于8 mg/L时,对厌氧释磷抑制明显;对好氧段均无明显影响。长期试验中,ρ_(Ag)为0.5 mg/L时,对除磷性能无明显影响;2.5 mg/L时,对SOP和COD的去除效果逐渐降低;5 mg/L时,对SOP和COD的去除效果较空白组显著降低。通过对EPS、MLVSS和MLSS的检测,反映出当ρ_(Ag)高于2.5 mg/L时,系统中PN、PS和微生物的含量均随ρ_(Ag)的提高和暴露时间的延长而减少。By setting different mass concentrations of nanosilver,EBPR process is simulated in SBR,and the changes of SOP and COD indexes in the system are explored through short and long-term exposure,so as to study the influence of nanosilver on the phosphorus removal efficiency of EBPR system.In the short-term experiment,when the mass concentration is lower than 4 mg/L,nanosilver has no obvious effect on the anaerobic section,and when the mass concentration is higher than 8 mg/L,it has obvious inhibition on the anaerobic phosphorus release,while both have no obvious effect on the aerobic section.In the long-term test,when the mass concentration of silver nanoparticles is 0.5 mg/L,the phosphorus removal performance of the system is basically not affected.When the mass concentration of silver nanoparticles is 2.5 mg/L,the removal effect of SOP and COD decreases gradually.Compared with the blank group,the removal effect of SOP and COD in the system is obviously lower with 5 mg/L nanosilver.The detection of EPS,MLVSS and MLSS shows that the contents of PN,PS and microorganisms in the system decrease with the increase of nanosilver mass concentration and the extension of exposure time when nanosilver mass concentration is higher than 2.5 mg/L.

关 键 词：纳米银 强化生物除磷 活性污泥 除磷性能 聚磷菌 

分 类 号：X703[环境科学与工程—环境工程]