摘要本次设计是根据永春县的生活污水排放情况和原有污水处理厂的污水处理能力为分析基础，再综合分析各个工艺的特征设计出一套污水处理工艺，经过分析比较筛选出AB工艺。设计内容主要包括工艺流程的设计、构筑物及建筑物的平面布置。本次工艺的流程：污水经过格栅、沉砂池去除掉一些体积较大的颗粒，接着进入到本次工艺的关键阶段：吸附池、沉淀池(A阶段)，A阶段高负荷的运行下，能去除掉大多数的有机物，然后污水进入到曝气池、沉淀池(B阶段)再进行进一步的处理，最后出水。出水水质符合排放标准。整个设计工艺，流程简略，运作灵活，管理便利，节约经济成本，契合中小型城镇污水处理厂的要求。关键词：生活污水：AB工艺：工艺设计AbstractThis design,the domestic sewage treatment status of Yongchun County,and the analysisof the sewage treatment capacity of the sewage treatment facility of Yuanyuan,the analysis ofthe special features of each project,the design of the sewage treatment project.After analysisand comparison,AB process is selected.The design content mainly includes process design,structure and building design.The sequence of this process is:the wastewater removes largerparticles through the network and the granary,and then enters the key stages of this process:the adsorption tank and the sedimentation tank (stage A),under the high-load operation ofstage A,Can remove most of the organic matter,and then the sewage enters the aeration tank,sedimentation tank (stage B)for further treatment,and finally the effluent.The effluentquality meets discharge standards.The whole design process is simple in process,flexible inoperation,convenient in management,saves economic cost,and meets the requirements ofsmall and medium-sized urban sewage treatment plants.Key words:Domestic sewage;AB Technology;technological design目录1.1污水处理发展现状.51.2污水处理工艺1.3设计的目的及意义2设计总则2.1设计范围62.2设计依据2.3设计原则73城市概况73.1社会经济73.2自然条件4工程设计.84.1设计水量.…4.2处理程度5工艺设计方案确定95.1方案确定原则5.2工艺的选择…6污水处理工艺流程107污水处理构筑物的计算7.1粗格栅.117.2提升泵房…127.3细格栅137.4曝气沉砂池15167.6A段曝气池和B段曝气池177.6.1A段曝气池.…7.6.2B段曝气池177.7二沉池…187.8重力浓缩池197.9平流式接触消毒池208污水处理厂总体布置.218.1平面布置218.2高程布置229结论…23参考文献…24致25附录A污水处理厂平面图26