倒置A2-O工艺的原理与特点研究(1).doc

倒置A2-O工艺的原理与特点研究(1).doc倒置A2/O工艺的原理与特点研究(1)
摘要:通过短时厌氧环境的生化特性、厌氧/缺氧环境倒置效应和小型系统平行对比试验,较系统地研究了倒置a2/o工艺的原理和工艺特点。指出:聚磷菌厌氧有效释磷水平的充分与否,并不是决定其在后续曝气条件下过度吸磷能力的充分必要条件。推进聚磷菌过度吸磷的本质动力与厌氧区hrt和厌氧环境的厌氧程度有关。
关键词:污水处理脱氮除磷倒置a2/o工艺 principle and characteristics of reversed a2/o process
zhang bo 1,gao ting yao 2
(1departof environeng,qingdao construction institute,qingdao 266033,china;2 state key labof pollution control and resource reuse,tongji univ,shanghai 200092, china) abstract:the biochemical characteristics of short time retention in anaerobic zone and sequence reversing of anaerobic and anoxic zones on phosphorus release and uptakeents the results shoore sufficient anaerobic environment produce a stronger potential of excess puptake in the follouch better effect of n-p removal can be obtained in biological nutrient removal process by reversing the position of anaerobic and anoxic zones and turning into reversed a2/o process its phosphorus and nitrogen removal rates are markedly higher thanthat of conventional a2/o process, oval rates are about equal
keyent;nitrogen removal;phosphorus removal;reversed a2/o process 常规生物脱氮除磷工艺呈厌氧(a1)/缺氧(a2)/好氧(o)的布置形式。该布置在理论上基于这样一种认识,即:聚磷微生物有效释磷水平的充分与否,对于提高系统的除磷能力具有极端重要的意义,厌氧区在前可以使聚磷微生物优先获得碳源并得以充分释磷[1]。但是,①由于存在内循环,常规工艺系统所排放的剩余污泥中实际上只有一少部分经历了完整的释磷、吸磷过程,其余则基本上未经厌氧状态而直接由缺氧区进入好氧区,这对于除磷是不利的;②由于缺氧区位于系统中部,反硝化在碳源分配上居于