盐度对序批式生物膜反应器性能及微生物活性影响  

Effect of salinity on performance and microbial activity of sequential batch biofilm reactor

作　　者：安鸿雪 张婉玉 薛飞[2] 白玉玮[2] 宁静 李再兴[1] AN Hongxue;ZHANG Wanyu;XUE Fei;BAI Yuwei;NING Jing;LI Zaixing(School of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050000,China;Shijiazhuang High-tech Industrial Development Zone Water Supply and Drainage Company,Shijiazhuang 050000,China)

机构地区：[1]河北科技大学环境科学与工程学院,河北石家庄050000 [2]石家庄高新技术产业开发区供水排水公司,河北石家庄050000

出　　处：《工业水处理》2023年第6期117-124,共8页Industrial Water Treatment

基　　金：石家庄市科学技术研究与发展计划项目(211240123A)。

摘　　要：为探究盐度对序批式生物膜反应器(SBBR)处理废水的影响,采用3种填料(白呼吸环、生物绳型填料、聚氨酯海绵悬浮球)对SBBR进行挂膜,且投加已筛选出的2种耐盐菌:宜兴曼格洛杆菌(Mangrovibacter yixingensis)和索氏菌属砷酸索氏菌(Thauera selenatis),分别在盐度0.5%、1%、2%、3%、4%、5%条件下考察其对COD、NH_(4)^(+)-N、NO_(3)^(-)-N和NO_(2)^(-)-N的降解效果以及对生物膜主要特性(SOUR、SAOR、SNOR、SNRR和EPS)的影响。结果表明,在盐度0.5%~3%范围内SBBR对COD降解率约90%,NH_(4)^(+)-N去除率约80%;盐度对菌群的抑制作用为亚硝酸盐氧化菌>氨氧化菌>硝酸盐还原菌;3种反应器中LB-EPS、TB-EPS中的PN和PS都随盐度的增加而增加,PN/PS随盐度的增加而降低,PS受盐度的影响更为明显;白呼吸环比生物绳型填料和聚氨酯海绵悬浮球具有更强的抗冲击能力,受盐度变化的影响较小,微生物种群更丰富;随着盐度的提高,3种填料的微生物优势种群有明显差异,经过耐盐菌的投加与驯化,Mangrovibacter成为优势菌属。In order to explore the influence of salinity change on sequential batch biofilm reactor(SBBR)wastewater treatment,three kinds of fillers(white breathing ring,biological rope type packing and polyurethane sponge suspen-sion balls)were used for membrane hanging,and two salt-tolerant strains,Mangrovibacter yixingensis and Thauera selenatis,were added.The degradation effects of COD,NH_(4)^(+)-N,NO_(3)^(-)-N and NO_(2)^(-)-N and their effects on the main characteristics of biofilms(SOUR,SAOR,SNOR,SNRR and EPS)were investigated at the salinity of 0.5%,1%,2%,3%,4%and 5%,respectively.The results showed that the COD degradation rate and NH_(4)^(+)-N removal rate of SBBR were about 90%and 80%respectively in the range of 0.5%-3%salinity.Among nitrite oxidizing bacteria,ammonia oxidizing bacteria and nitrate reducing bacteria,salinity had the greatest inhibitory effect on nitrite oxidiz-ing bacteria,then followed by ammonia oxidizing bacteria,and the least inhibitory effect on nitrate reducing bacte-ria.PN and PS in LB-EPS and TB-EPS in the three reactors increased with increasing salinity,while PN/PS ratio decreased with increasing salinity,and PS was more significantly affected by salinity.Compared with biological rope type packing and polyurethane sponge suspension ball,white breathing ring had stronger impact resistance,less af-fected by salinity changes,and more abundant microbial population.With the increase of salinity,the dominant mi-crobial populations of the three fillers were significantly different.After the addition and domestication of salt-tolerant bacteria,Mangrovibacter became the dominant bacterial genus.

关 键 词：SBBR COD降解 脱氮速率 微生物酶活性 微生物群落结构 

分 类 号：X703.1[环境科学与工程—环境工程]