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1、设计总说明本设计是3104m3/d城市污水二级处理厂工艺设计。该处理厂处理城市污水,根据当地环保部门水质调查及其他城市水质比调查，本城市对污水的处理主要包括COD、BOD5，对脱氮除磷也有要求。污水经处理后排入污水厂东侧的受纳水体排污渠，出水最终排入某河，该河段为地表水环境质量标准（GB18918-2002）中的类功能水域，出水水质应达到城镇污水厂污水排放标准（GB18918-2002）一级标准B标准。根据设计要求，该污水处理工程进水中氮磷含量偏高，在去除BOD5和COD的同时，还需要进行脱氮除磷处理，同时，本污水厂处理水量较小，故采用SBR序列间歇式活性污泥法，SBR是一种按间歇曝气方式来运
2、行的活性污泥污水处理技术，又称序批式活性污泥法。本工艺的主要构筑物包括格栅、污水泵房、曝气沉砂池、厌氧池、SBR、接触消毒池、浓缩池、污泥脱水机房等。污水进入污水厂经过中隔栅后经污水泵房提升进入细格栅，在进入曝气沉砂池曝气沉砂，随后进入厌氧池对污水进行水解酸化，再进入SBR池反应，然后进入接触消毒池消毒，污水达到水质要求，经过计量槽后排出污水。SBR的剩余污泥经过污泥泵房提升后进入集泥井，再进入浓缩池浓缩，浓缩后的污泥含水量减少再进入贮泥池，随后进入污泥缩水车间进行脱水，脱水后的污泥外运。本设计污水处理采用了SBR工艺，它的主要特征是在运行上的有序和间歇操作，SBR工艺的核心是SBR反应池，该
3、池集均化、初沉、生物降解、二沉等功能于一池，无污泥回流系统。经过这个废水处理工艺的废水可达到设计要求，可以直接排放。产生的污泥经过浓缩、压滤等处理后，进行堆肥产生一定的经济效益。本设计书的主要内容为设计资料、污水污泥处理工艺的选择、污水污泥的计算、污水厂平面布置的选择、人员的配置以及工程技术经济的分析。关键词：城市污水处理；SBR工艺；脱氮除磷；污泥Design DescriptionThis design is 3 x 104 m3 / d city sewage treatment plant process design 2. The sewage treatment plant, ac
4、cording to local environmental protection department survey of water quality and water than other cities, the city of sewage treatment is mainly include COD, BOD5, also has asked for nitrogen and phosphorus. Treated sewage back into the sewage plant on the east side of the receiving waters outfall,
5、the water eventually discharged into a river, the river to surface water environment quality standard (GB18918-2002) in the waters class function, effluent water quality should reach the town sewage factory wastewater discharge standard (GB18918-2002) level of B standard. According to design require
6、ments, the high content of nitrogen and phosphorus in water, sewage disposal engineering at the same time of removal of BOD5 and COD, Nitrogen phosphorus removal process is needed, at the same time, water volume small, the sewage treatment plant is adopted SBR sequencing batch activated sludge proce
7、ss, SBR is a kind of according to the way of intermittent aeration to operation of the activated sludge wastewater treatment technology, also known as sequencing batch type activated sludge process. Main structure of this process include grille, sewage pump room, aerated grit chamber, bio-p tank, SB
8、R, contact disinfection pond, thickener and sludge dewatering machine room, etc. Sewage into the sewage factory after barrier in the sewage pump room to ascend into fine grille, entered the aerated grit chamber aeration settling, then enter the bio-p tank to hydrolysis acidification, the sewage reac
9、ts to SBR pool, and then enter the contact pool disinfection, disinfection of sewage meet water quality requirements, after the back tank out of the water. SBR of excess sludge after sludge pump room ascension into the mud collecting Wells, again into the thickener concentration, concentrated sludge
10、 water content reduce storage into the mud pool, then enter the dewater sludge shrink workshop, after the dehydration of sludge sinotrans. This design adopted SBR wastewater treatment process ,the main characteristic of it is on the run orderly and intermittent operation , sinking for the first time
11、 , function that biodegradation , two sink ,etc. in one pond, there is no mud backset current system. Can reach the designing requirement through the waste water of this waste water treatment craft , can discharge directly . Mud that produce after concentrating , pressing and straining etc. dealing
12、with , go on compost produce sure economic benefits.The main content of this design document for design, selection of sewage sludge treatment process, the calculation of sewage sludge, sewage plant layout selection, configuration of personnel and engineering technical and economic analysis. Key word
13、s: Urban sewage treatment, SBR craft, Taking off the nitrogen and the phosphorus , mud 目 录1 绪 论11.1 设计题目11.2 原始资料11.2.1 设计规模11.2.2 污水性质11.2.3 其他资料21.3 处理要求21.4 毕业设计题目应完成的工作21.4.1 设计完成的主要工作21.4.2 最终要求提交成果21.5 设计流量31.5.1 污水设计流量31.5.2 污水总变化系数31.5.3 最大设计流量31.5.4 最小设计流量31.6 处理程度计算31.6.1 SS的去除率41.6.2 BOD5
14、的去除率41.6.3 COD的去除率52 工艺流程的确定62.1 污水污泥处理工艺的选择62.1.1 污水处理设计62.1.2 污泥处理设计82.2 污水处理厂工艺流程图92.3 处理构筑物92.3.1 污水处理92.3.2 污泥处理113 污水污泥处理计算133.1 污水构筑物计算133.1.1 中格栅133.1.2 提升泵房173.1.3 细格栅173.1.4 曝气沉砂池213.1.5 厌氧池233.1.6 SBR反应池253.1.7 鼓风机房313.18 接触池323.1.9 巴氏计量槽343.2 污泥构筑物计算363.2.1污泥水分去除的意义和方法363.2.2集泥井363.2.3 浓
15、缩池363.2.4贮泥池的计算373.2.5污泥脱水计算394 污水处理厂总体布置414.1 污水厂厂址选择414.2 污水厂平面布置414.3 污水处理厂构筑物高程布置计算425 人员配置和管理476 工程技术经济分析486.1 土建费用及主要设备材料费用486.1.1 土建费用造价列表486.1.2 主要设备清单486.1.3 直接投资费用496.2 运行费用计算496.2.1 成本估算496.2.2 运行费用496.3 工资福利开支496.4 生产用水水费开支506.5 运费506.6 维护维修费506.7 管理费用506.8 运行成本核算50结 论51致 谢52参考文献531 绪 论水是人类的生命之源。它孕育和滋养了地球上的一切生物，并从各个方面为人类服务。水的用途大致有以下几个方面：生活用水、工业用水、农业用水、渔业用水、交通运输用水等。一般情况下，与人类生产和生活密切相关的前三种用水不能大规模取用海洋咸水，而只能取用淡水。但是，水环境中的淡水资源却很少，仅占总量的2.53，而目前能供人类直接取用的淡水资源仅占0.22，加之自然水源的季节变化和地区差异，以及自然水体遭到的普遍污染，致使可能直接取用的优质水量日益短缺，难以满足人们生活和工农业生产日益
