城市污水处理厂扩容改造技术方案研究

发布时间：2018-04-27 02:07

本文选题：扩容 + 改造　；参考：《青岛理工大学》2014年硕士论文

【摘要】：在发展迅速的城市，原有的污水处理厂设计处理规模较小且存在排放标准不够严格的现象，新建污水处理厂又存在很多困难，对原有污水处理厂进行扩容升级改造成为解决这一问题的首要方法，因此对城市污水处理厂扩容的升级改造工程工艺的研究至关重要。本文主要以李村河污水处理厂扩建工程为例对城市污水处理厂的扩容升级改造的工艺进行了研究。李村河污水处理厂所在的青岛市是山东省蓝色半岛区域的经济中心和著名的旅游胜地，环境宜人，市民的节水意识强，政府对污水处理工作极为重视。随着城市化水平的提高，城镇人口不断增加，工业企业数量增多，城市污水排放量迅速增大，另外，随着城市逐步完善市政管网建设，市政管网收集的污水量不断增多，进入城市污水处理厂处理的污水量越来越大。就李村河污水处理厂而言，按照总体规划和实际建设情况，李村河排水系统进行了污水管线的完善配套，接入李村河污水厂的污水量持续增加，使李村河污水处理厂目前已超负荷运行，并且污水系统上游已经出现了溢流。如果生活污水和工业废水不经过污水处理设施的有效处理而直接排入河道，将会对环境造成严重的污染。本文介绍了我国污水处理的现状及发展趋势、青岛市的给水和排水系统现状及规划、李村河污水处理厂的现状，确定了李村河污水处理厂扩建工程的设计规模和进出水水质，并对项目建设的必要性进行了说明。通过对扩容升级改造常用方法的介绍和比选分析，，综合考虑李村河污水处理厂现有条件、用地、处理效果、投资及运行等因素，确定李村河污水处理厂扩建工程的生物处理采用MBBR工艺。对于污泥处理系统来说，由于扩建工程选址于李村河污水处理原有场地内，考虑到用地问题，新建污泥处理设施存在较大的困难，所以扩建工程的污泥处理采用污泥浓缩后直接脱水外运处置的方案。对于臭气的去除，通过对几种常用除臭工艺的分析比选，确定采用城镇污水厂全过程除臭工艺，同时在预处理阶段的格栅间和污泥处理阶段的脱水机房设置安装离子除臭设备以保证除臭效果，另外根据青岛市政府的统一要求，对整个污水处理厂的预处理阶段、生物处理阶段和污泥处理阶段均进行加盖，防止臭气的扩散。扩建工程包括新建处理规模4.5万m3/d处理设施和现有处理设施扩容3.5万m3/d的相应改造，本工程实施后，李村河污水处理厂的处理规模将达到25万m3/d。进入李村河污水处理厂的污水经过处理后，出水水质满足《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准的要求排入胶州湾。为有效循环利用水资源，减少水资源的浪费，本次扩建工程还将配套建设7万m3/d的再生水外送设施。
[Abstract]:In rapidly developing cities, the original sewage treatment plants are designed and treated on a relatively small scale and there is a phenomenon that the discharge standards are not strict enough, and there are many difficulties in building new sewage treatment plants. The primary method to solve this problem is to upgrade and upgrade the original sewage treatment plant, so it is very important to study the upgrading and upgrading engineering technology of the urban sewage treatment plant. In this paper, the expansion and upgrading process of the municipal sewage treatment plant is studied with the example of the expansion project of Licuanhe sewage treatment plant. The city of Qingdao, where the sewage treatment plant is located, is an economic center and a famous tourist resort in Blue Peninsula area of Shandong Province. The environment is pleasant and the people have a strong sense of saving water. The government attaches great importance to the sewage treatment work. With the development of urbanization, the population of cities and towns is increasing, the number of industrial enterprises is increasing, and the discharge of municipal sewage is increasing rapidly. In addition, with the gradual improvement of municipal pipe network construction, the amount of sewage collected by municipal networks is increasing. The amount of sewage coming into the municipal sewage treatment plant is increasing. As far as the Lichunhe sewage treatment plant is concerned, according to the overall planning and actual construction situation, the drainage system of the Licun River has carried out a complete set of sewage pipelines, and the amount of sewage connected to the sewage treatment plant of the Licun River has continued to increase. The sewage treatment plant has been overloaded and overflow has occurred in the upper reaches of the sewerage system. If domestic and industrial wastewater are discharged directly into the river without the effective treatment of sewage treatment facilities, it will cause serious pollution to the environment. This paper introduces the present situation and development trend of sewage treatment in China, the present situation and planning of water supply and sewerage system in Qingdao, and the present situation of the sewage treatment plant of Li Cun he, and determines the design scale and the quality of incoming and outgoing water of the expansion project of the sewage treatment plant of Li Cun he. The necessity of project construction is explained. Through the introduction and comparison analysis of the common methods of capacity expansion and upgrading, the existing conditions, land use, treatment effect, investment and operation of Licuanhe sewage treatment Plant are considered synthetically. MBBR process was adopted in the biological treatment of the expansion project of Licuanhe sewage treatment Plant. For the sludge treatment system, due to the site selection of the expansion project in the original site of Licun River sewage treatment, considering the problem of land use, it is difficult to build a new sludge treatment facility. So the sludge treatment of the expansion project adopts the scheme of sludge enrichment and direct dewatering. For the removal of odor, through the analysis and selection of several commonly used deodorization processes, it is determined to adopt the whole process of deodorization in urban sewage plants. At the same time, ion deodorization equipment is installed between the grille in the pretreatment stage and in the dehydrator room in the sludge treatment stage to ensure the deodorization effect. In addition, according to the unified requirements of the Qingdao Municipal Government, the pretreatment stage of the whole sewage treatment plant is put in place. Both the biological treatment stage and the sludge treatment stage are covered to prevent the spread of odor. The expansion project includes the corresponding transformation of the new treatment scale of 45000 m3 / d and the existing treatment facility of 35000 m3 / d. After the implementation of the project, the treatment scale of the Licun River sewage treatment Plant will reach 250000 m3 / d. After treatment, the effluent quality of the wastewater from Licuanhe sewage treatment Plant meets the requirement of Grade A of the first Class A Standard of pollutants discharge Standard (GB18918-2002) of the Municipal sewage treatment Plant (GB18918-2002) and discharged into Jiaozhou Bay. In order to effectively recycle water resources and reduce waste of water resources, the expansion project will also build 70,000 m3 / d renewable water delivery facilities.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：X703.1

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