基于ABR-MBR组合工艺不同进水C/N比对反硝化除磷性能的影响机制  

Effects of Influent C/N Ratios on Denitrifying Phosphorus Removal Performance Based on ABR-MBR Combined Process

作　　者：吴鹏[1,2] 程朝阳 沈耀良[1,2,3] 赵诗惠 吕亮[1,2] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]江苏省水处理技术与材料协同创新中心,苏州215009 [3]江苏省环境科学与工程重点实验室,苏州215009

出　　处：《环境科学》2017年第9期3781-3786,共6页Environmental Science

基　　金：国家自然科学基金项目(51578353);江苏省自然科学基金项目(BK20160356);江苏省高校自然科学研究重大项目(12KJA610002);江苏省高校自然科学基金项目(16KJB610013);江苏高校优势学科建设工程项目;环境工程江苏省重点专业类项目;苏州科技学院科研基金青年项目(XKQ201504);苏州科技学院研究生科研创新计划项目(SKCX15_032);江苏省2015年度普通高校研究生实践创新计划项目(SJLX15_0636)

摘　　要：基于厌氧折流板反应器(ABR)微生物相分离及膜生物反应器(MBR)高效截留的特性,通过加设硝化液回流与污泥回流实现了ABR-MBR一体化反应器的循环联动,对连续流条件下调控进水COD浓度及COD/TN比条件下的反硝化除磷影响机制展开了研究.结果表明在5个不同进水C/N比下,ABR-MBR组合工艺最终出水溶解性PO_3-4-P平均浓度分别为0.22、0.34、0.39、0.42和2.45 mg·L^(-1),低C/N比可获得更好的除磷效果,而C/N为4.8~6.0时,工艺对COD、TN和溶解性PO_3-4-P去除率分别在87%、76%和93%以上.此外,在C/N为3.6~6.0时,ABR缺氧吸磷量与工艺对TN去除量呈良好的线性关系,提高进水C/N比有助于系统对TN的去除.最终获得进水C/N比为6时最有利于氮和磷的同步去除.An ABR-MBR integrated reactor based on a combination of the anaerobic baffled reactor（ ABR） with the microbial phase separation and membrane bioreactor（ MBR） with high-effect entrapment was constructed and the circulation and interactivity of the combined process were examined by adding nitrate recycling and sludge reflux. By increasing the influent COD to adjust the COD/TN ratio,the influence of the mechanism on the denitrifying phosphorus removal performance under the condition of continuous-flow was investigated. The results showed that the average effluent concentration of soluble phosphorus under different influent C/N conditions were 0. 22,0. 34,0. 39,0. 42,and 2. 45 mg·L^-1and the low influent C/N ratio was beneficial to phosphate removal. When the influent C/N was 4. 8-6. 0,the average removal rates of COD,TN,and soluble PO4^3--P were more than 87%,76%,and 93%. In addition,when the influent C/N ratio was 3. 6-6. 0,the removal of TN was proportional to the anoxic phosphorus uptake of ABR and conducive to the removal of TN after increasing the influent COD concentration. Higher C/N ratios of the influent improved the removal of TN at this stage. Finally,the C/N ratio of 6 was suggested to achieve the simultaneous removal of nitrogen and phosphorus.

关 键 词：ABR-MBR组合工艺 反硝化除磷 C/N比 影响因素 

分 类 号：X703.1[环境科学与工程—环境工程]