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1、扬州职业大学毕业设计摘摘 要要污水处理厂处理规模为近期 3.0 万 m/d ，远期 6.0 万 m/d，设计进水水质为：悬浮物（SS）：30mg/L；五日生化需氧量（BOD5）：30mg/L；化学需氧量（CODcr）：100mg/L；出水水质达到城镇污水处理厂污染物排放标准 （GB 18918-2002）二级标准，拟定出水水质指标为：CODCr：100mg/L；BOD530mg/L；SS30mg/L；NH3-N10mg/L。设计进水水质氮含量较高，因此在设计处理工艺是还需要考虑脱氮除磷技术，由于污水厂规模较小，污水日变化量较大，因此，在设计过程中选择适应该情况的氧化沟工艺。在氧化沟前添加厌氧池
2、，以提高除磷效果。实现出水水质达标且稳定的目的。本次设计的主要构筑物包括集水井、粗格栅、泵房、细格栅、曝气沉砂池、carrousel氧化沟、辐流式二沉池、配水井、污泥浓缩池、污泥脱水车间等。市政污水管网收集的污水经中格栅拦截较大的悬浮物和漂浮物后，由污水泵房提升至细格池去除比重较大的无机颗粒，通过氧化沟，以去除大量的有机物，同时达到脱氮除磷的效果。处理后的污水在辐流式二沉池内进行泥水分离，再经过 V 型滤池进一步去除 SS，后经消毒后排放。污泥回流比为 100%，其余的由污泥脱水机房浓缩脱水后外运。本次设计污水厂占地 10.09km2。 设计中省略了初次沉淀池，节省了基建和运行费用。氧化沟表面
3、曝气设备简单，管理方便，且出水较为稳定，做到了水资源的合理利用。关键词关键词：污水处理、carrousel 氧化沟工艺、脱氮除磷扬州职业大学毕业设计AbstractSewage treatment plant scale of the recent 30000 m / d, forward 60 000 m / d, the design water quality are: suspended solids (the SS)：30mg / L； 5, biochemical oxygen demand (of BOD5): 30mg / L； chemical oxygen demand (
4、CODcr): 100mg / L； two standards of water quality of urban sewage treatment plant emission standards (GB 18918-2002), development of water quality indicators: of CODCr: 100mg / L； of BOD5 30mg / L； SS 30mg / L； of NH3-N 10mg / LDesign high water quality nitrogen content in the design of treatment pr
5、ocesses is also need to consider nitrogen and phosphorus removal technology, the smaller wastewater treatment plant, sewage larger variation in the design process to adapt to the situation of the oxidationditch process. Added before the oxidation ditch anaerobic tank to improve phosphorus removal. A
6、chieve the purpose of water quality standards and stable.The design of the main structures, including the set of wells, the coarse grid, pumping stations, the fine grid, aerated grit chamber, carrousel oxidation ditch, the radial flow sedimentation tank, with wells, sludge thickener, sludge dewateri
7、ng work shop and so on. Grille intercept larger suspended solids and floating debris in the sewage that has been collected by the municipal sewer network, upgrade the sewage pumping station to the fine grid pool to remove a large proportion of inorganic particles to remove a lot of organic matter th
8、rough oxidation ditch, achieve the effect of nitrogen and phosphorus removal. Treated sewage mud in the secondary settling tanks radial flow separation, and then after the V filter for further removal of SS emissions after disinfection. Sludge return ratio of 100%, the rest of the sludge dewatering
9、machine room dewatering Sinotrans.The design of wastewater treatment plant covers an area of 10.09km2. Omitted from the initial sedimentation tanks in the design, infrastructure and operating costs savings. Oxidation ditch surface aeration equipment is simple, easy management, and water is more stab
10、le, so that a reasonable use of water resources.Key words：sewage treatment, carrousel2000 oxidation ditch process, nitrogen and phosphorus removal.某城镇污水处理厂初步设计目目 录录第一篇第一篇 设计说明书设计说明书.11 概述概述.11.1 设计任务.11.2 设计依据.11.2.1 规范标准.11.2.2 参考文献.11.3 区域概况.11.3.1 自然条件.11.3.2 城市污水排放现状.22 污水处理厂的设计污水处理厂的设计.22.1 规模与处理程度的确定.22.1.1 污水处理厂规模与处理目标.22.1.2 设计进出水水质.22.1.3 污水处理程度确定.32.2 污水处理厂方案的确定.32.2.1 确定污水处理方案的原则.32.2.2 污水处理方案的比选.
