文献综述
污水处理工艺的现状及发展趋势摘要：随着社会和经济的快速发展，人民生活水平的不断提高，城镇用水量也逐日剧增，同时污水的排出量也大量增加，污水处理厂要对城市生活污水和工业废水进行合理、有效、经济的处理以达排放。
目前污水处理工艺主要有：AB法、A/O、A2/O、氧化沟法、曝气法等。
通过比较这些污水处理工艺的优缺点，保证脱氮除磷，从而发现适合实际情况的处理工艺，并且对污水处理工艺的发展进行展望。
关键字：城镇污水、处理工艺、脱氮除磷、发展Current situation and development trend of sewage treatment processAbstract: with the rapid development of society and economy and the continuous improvement of peoples living standards, urban water consumption is also increasing sharply day by day. At the same time, the discharge of sewage is also increasing greatly. The sewage treatment plant should reasonably, effectively and economically treat urban domestic sewage and industrial wastewater to achieve discharge. At present, sewage treatment processes mainly include: AB method, A/O, A2/O, oxidation ditch method, aeration method, etc. By comparing the advantages and disadvantages of these sewage treatment processes to ensure nitrogen and phosphorus removal, we can find the treatment process suitable for the actual situation, and look forward to the development of sewage treatment process.Key words: urban sewage, treatment process, nitrogen and phosphorus removal, development1．关于活性污泥法当前流行的污水处理工艺有：AB法、SBR法、氧化沟法、普通曝气法、A2/O法、A/O 法等，这几种工艺都是从活性污泥法派生出来的，且各有其特点。
① AB法(AdsorptionBiooxidation) 该法由德国Bohuke教授首先开发。
该工艺对曝气池按高、低负荷分二级供氧，A级负荷高，曝气时间短，产生污泥量大，污泥负荷2.5kgBOD/(kgMLSSd)以上，池容积负荷6kgBOD/(m3d)以上；B级负荷低，污泥龄较长。
A级与B级间设中间沉淀池。
二级池子F/M(污染物量与微生物量之比)不同，形成不同的微生物群体。
AB法尽管有节能的优点，但不适合低浓度水质，A级和B级亦可分期建设。
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