生化尾水深度处理生物膜载体筛选研究  

Study on Selection of Biocarrier for Advanced Treatment of Effluent from Biochemical Processes

作　　者：杨阳 汪坤 胡小兵[2,3] YANG Yang;WANG Kun;HU Xiaobing(Jsti Group Co.,Ltd.,Nanjing 210017,China;College of Architectural Engineering,Anhui University of Technology:Ma'anshan 243002,China;Engineering Research Center of Water Purification and Utilization Technology based on Biofilm Process,Ministry of Education:Ma'anshan 243032,China)

机构地区：[1]苏交科集团股份有限公司,江苏南京210017 [2]安徽工业大学建筑工程学院,安徽马鞍山243002 [3]生物膜法水质净化及利用技术教育部工程研究中心,安徽马鞍山243032

出　　处：《水处理技术》2025年第3期135-140,共6页Technology of Water Treatment

基　　金：生物膜法水质净化及利用技术教育部工程研究中心项目(BWPU2021ZY01;BRT19-02);安徽省重点研究与开发计划(202004h07020027)。

摘　　要：为筛选适合低浓度生化尾水深度处理的生物膜载体,本文采用4种不同孔隙率的生物膜载体(悬浮型的多面空心球、K1型填料与堆积型的陶粒、火山岩)进行挂膜,考察载体附着生物膜的主要特性(生物膜量MLSS、胞外聚合物EPS)和废水处理效果。结果表明:悬浮型载体附着生物膜的MLSS、生物膜活性f值较高,MLVSS(5.44 mg/cm3)、EPS(19.03 mg/(g·SS))、PN(5.22 mg/(g·SS))、PS(13.81 mg/(g·SS))含量均高于堆积型生物膜载体,且悬浮型生物膜载体的污染物去除效果优于堆积型生物膜载体。多面空心球生物膜载体附着的生物膜量(7.60±4.01 mg/cm3)最大且生物膜活性f值(0.88±0.08)最高,生物膜中EPS含量(20.77±6.61 mg/(g·SS))、EPS中多糖含量(15.75±4.48 mg/(g·SS))均高于其他生物膜载体;多面空心球生物膜载体对COD、NH_(4)^(+)-N和TP去除率分别为(63.74±3.02)%、(90.67±6.46)%和(62.74±3.47)%,污染物去除效果最好。其他三种生物膜载体生物膜量、EPS含量均低于多面空心球;除火山岩对NH_(4)^(+)-N去除率(90.82±8.35%)略高于多面空心球,K1型填料和陶粒对污染物去除率均低于多面空心球生物膜载体。总之,多面空心球是低浓度生化尾水处理挂膜的最适生物膜载体。To identify the most suitable biocarrier for advanced treatment of low-strength biochemical effluent,four biocarriers with differing void ratios—suspended polyhedral hollow ball,K1 filler,accumulated ceramsite,and volcanic rock—were evaluated for biofilm formation.The main biofilm properties,including biofilm biomass(BB),volatile biofilm biomass(VBB),extracellular polymeric substances(EPS),and pollutant removal performance,were investigated.Suspended biocarriers exhibited higher BB content and biofilm activity(f-value)than accumulated biocarriers.They also had higher contents of VBB(5.44 mg/cm³),EPS(19.03 mg/(g·SS)),protein(PN)(5.22 mg/(g·SS)),and polysaccharide(PS)(13.81 mg/(g·SS)).Among these,the polyhedral hollow ball presented the highest BB(7.60±4.01 mg/cm³)and f-value(0.88±0.08),as well as elevated EPS(20.77±6.61 mg/(g·SS))and PS(15.75±4.48 mg/(g·SS))contents.Consequently,it exhibited the best pollutant removal rates at 63.74%±3.02%for COD,90.67%±6.46%for NH_(4)^(+)-N,and 62.74%±3.47%for TP.Although volcanic rock achieved a slightly higher NH_(4)^(+)-N removal rate(90.82%±8.35%),both K1 filler and ceramsite showed lower removal efficiencies than the polyhedral hollow ball.Overall,the polyhedral hollow ball emerges as the most suitable biocarrier for advanced treatment of low-strength biochemical effluent.

关 键 词：低浓度尾水 生物膜载体 胞外聚合物(EPS) 水处理效果 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]