某市12万m3d污水处理厂工艺设计(ab法)毕业设计(编辑修改稿)

某市12万m3d污水处理厂工艺设计(ab法)毕业设计(编辑修改稿)内容摘要：

eatment structures,the main supporting structures and the 华北科技学院毕业设计（论文） VII Nonstandard equipment。 (8)The preparation of major equipment and materials table。 Design principles Consider the city’s economic development and local existing conditions,determine the program to take into account the following principles: (1)to ply with applicable of all,to ensure that the sewage treatment plant to meet emission the realities of the technical and economic conditions,as well as the specific local situation(such as the construction of the conditions),where possible,based on the treatment of choice of process,structure(building)the building type,major equipment,design standards and data should be the largest Wastewater Treatment Plant to meet the limits of realization of functions,so that the water quality of treated effluent in line with the requirements. (2)wastewater treatment plant design uses the design parameters must be reliable. (3)the design of sewage treatment plants must meet the requirements of the is pleted,the overall layout,design and pharmaceutical monomer to the use of as much as possible to take reasonable measures to reduce project cost and operational management costs. (4)sewage treatment plant design should be sought technical the principle of economic rationality,must be based on need,as far as possible the use of advanced technology,machinery and automatic control technology,but to ensure that safe and reliable. (5)wastewater treatment plant design should be noted that the bination of near term should not be part of a phased construction,such as the allocation of wells,pumping stations and processing drugs,etc.,and its construction should be pleted first。 in the absence of longterm planning,the design should be left for future development and expansion of potential conditions. (6)wastewater treatment plant design must take into account the conditions of safe operation,such as setting appropriate triage facilities,pipelines,. III The design of background data 武汉市 12 万 m3/d 污水处理厂工艺设计（ AB 法） VIII Sewage treatment plant in Wuhan city basic information The basic situation in Wuhan: This design is Wuhan drainage engineering in the hinterland of Wuhan Chinese center, Yangtze River and Hanjiang River East, at the intersection of Jianghan Plain, so named because of Wuchang, Hankou, Hanyang three collectively, the geographical position is longitude 113 176。 41’ 115 176。 0539。 , north latitude 29 176。 58 39。 31 176。 2239。 , is a subprovincial city only six provinces in central, is the approval of the State Council of the central area of the city resident population, the total GDP, builtup area and other indicators,Wuhan is middle first, the top ten big city. The third longest river in the world and its largest tributary of the Yangtze River running through the urban area,the Wuhan one divides into three, the formation of Wuchang, Hankou,Hanyang cross river tripartite confrontation pattern. The city is also the world per capita in Wuhan city water up. Although the Wuhan adequate water, but with the development of the city,water pollution is serious day by day, grow with each passing day, in order to protect the water quality situation of the main river of the Yangtze River in the country, it is necessary to build plant of Wuhan treatment of domestic sewage and industrial wastewater treatment, treatment pliance after discharge to the receiving water, avoid the water quality deterioration. The climate environment survey of Wuhan city (1)the direction of the wind The dominant wind direction: Northeast wind. (2)the temperature Wuhan belongs to the subtropical humid monsoon climate zone. There is warm, wet winter and spring drought, summer rainy, winter and less snow, four distinct average annual temperature is ℃ , the average July temperature up to ℃ , in January only ℃ .High summer temperatures, the temperature above 35 ℃ for 40 days or so,extreme maximum temperature of ℃ , the extreme minimum temperature of ℃ .Continuous Wuhan day temperature ≥ 10 ℃ period up to 235 days, the annual average frost free period 240 annual average precipitation , rainfall concentrated in the April to September, the average annual evaporation capacity of , 华北科技学院毕业设计（论文） IX annual average millibar absolute humidity, annual average relative humidity of . (3)Geological conditions Lying to the East West High low, the north south high low middle Yangtze River, Han River, is shaped like the letter Y is cut into three pieces, called the towns of City, with an average altitude of meters, the highest elevation of 873 meters, the minimum altitude of meters. Frozen soil layer is 0 meters. Factory covers an area of about 560000 square meters, near the Han River,relatively flat terrain, elevation difference can be neglected, the whole is rectangular, about 800 meters long, 700 meters wide. treatment scale The design of the sewage treatment plant design for the total size of the 120xx0m3/d, variation coefficient of . Wastewater treatment plant water by flow design of the highest daily maximum, a design, implemented in two phases. The water quality of influent and effluent Sewage treatment plant influent water quality and sewage treatment effluent quality as described in the following table: Table 1 Wuhan sewage treatment plant water status IV Sewage treatment process According to the domestic and foreign has been in operation for medium and small sewage treatment plant investigation, to set the goal of governance and economic and reasonable, the design can be used AB process. Project COD(mg/L) BOD5(mg/L) NH4N(mg/L) SS(mg/L) TP(mg/L) PH Influent water 300 300 20 220 2 Effluent water ≦ 60 ≦ 20 ≦ 8（ 15） ≦ 20 ≦ 1 6～ 9 武汉市 12 万 m3/d 污水处理厂工艺设计（ AB 法） X V The design results The engi。