模糊控制强化生物除磷SBR系统的除磷过程

采用在线ORP和pH仪对两个平行的强化生物除磷(EBPR)SBR反应系统的厌氧放磷、缺氧吸磷和好氧吸磷过程进行监测。针对聚糖菌(GAO)和聚磷菌(PAO)的竞争和影响PAO和反硝化聚磷菌(DPAO)的各种因素，验证了以氧化还原电位(ORP)和pH作为除磷过程模糊控制参数的可行性和有效性。在此基础上，确立了厌氧／好氧(A／O)SBR系统和厌氧／缺氧(A2)SBR系统除磷过程的模糊控制策略。对ORP和pH的在线检测不仅可以模糊控制厌氧放磷、缺氧吸磷和好氧吸磷过程所需时间，节约能源优化处理效果，而且可以指示系统运行效果和功能微生物种群的竞争行为。

Fuzzy control of EBPR SBR for phosphorus removal

s To establish an fuzzy control system of phosphorus removal, two laboratory-scale enhanced biological phosphorus removal (EBPR) SBRs with on-line monitors of pH and ORP were applied to treatment of domestic wastewater. Continuous measurements of these parameters were related with the dynamic behaviors of anaerobic phosphorus release, anoxic phosphorus uptake and aerobic phosphorus uptake in the EBPR SBR, allowing detecting the end of cycles. To further establish the feasibility and validity of using pH and ORP as fuzzy control parameters, process conditions of stimulating competition between phosphorus and glycogen accumulating organisms (PAO and GAO) and of effecting behaviors of PAO and denitrifying phosphorus removal organism (DPAO) were investigated. On basis of it, fuzzy control strategy was specified in accordance with different conditions. Fuzzy control by monitoring pH and ORP not only results in reduced energy consumption and performance optimum but also provides some valuable information about the behavior of functional microorganism.