Three-year action plan for improving the quality and efficiency of sewage treatment

In order to further improve the quality of the water environment, speed up the shortcomings of domestic sewage treatment, and promote domestic sewage treatment at a high level, according to the relevant requirements of the national, provincial and municipal governments on in-depth fighting against pollution prevention and control, improving the quality and efficiency of sewage treatment, etc., Around the goals and tasks of the Mobilization Order of the General River Chief of Suzhou on carrying out the Action of "Eliminating the inferior and fighting for the Superior" to comprehensively eliminate the inferior V water bodies (No. 1 of 2021), combined with the actual situation of our city, the municipal government decided to implement the three-year action plan for improving the quality and efficiency of sewage treatment.

1. Guiding ideology

 Adhere to the problem orientation, goal orientation and result orientation, focus on strengthening the weaknesses, strength and efficiency, focus on comprehensively improving the quality of the water environment, promote the quality and efficiency of sewage treatment with high quality, and gradually realize the goal of clear river water and green bank, smooth and shallow bottom, add the background color for the water city Suzhou, and constantly enhance the people's sense of gain and happiness.

Ii. Main objectives

From 2021 to 2023, we will carry out in-depth actions to improve the quality and efficiency of sewage treatment, promote the integrated management of rivers and lakes in the plant network, and build a coordinated sewage treatment system. With the goal of "full coverage, full collection, full transportation, and full treatment", a new pattern of sewage treatment with "source control in place, plant network connection supporting, pipe network maintenance fine, sewage treatment quality, and sludge disposal safety" is built. We will basically eliminate sewage outfall and sewage pipe network blank areas in urban built-up areas, establish a sewage treatment system with matching capacity, and create a model area for improving sewage treatment quality and efficiency. Efforts should be made to improve the urban water environment, completely eliminate substandard Class V water bodies in urban built-up areas, and create a number of high-quality clean water waterways. The comprehensive level of sewage treatment and water environment treatment is in the forefront of the province and the country.

3. Key tasks

Improve the sewage collection and treatment capacity, crack the bottleneck; We will promote the construction of quality and efficiency improvement zones and eliminate weak links. Improve the quality of urban water environment, build clean water quality river, improve people's livelihood experience; Strengthen the quality and efficiency of construction, maintenance and management, and ensure long-term treatment. Implementation of precision, high-level promotion of sewage treatment work, more than 75% of the urban built-up areas and Jiangnan water town ancient town area, more than 65% of the township built-up areas into the "sewage treatment quality and efficiency up to standard area", completed 627, 1227.68 square kilometers, priority implementation of key areas, sensitive areas of the standard construction.

(a) implementation of sewage collection and treatment capacity improvement projects.

1. Improve the comprehensive sewage treatment capacity. Focusing on the improvement of treatment capacity, on the basis of the full assessment of the current situation, in accordance with the requirements of unified planning and unified construction, optimize the layout of sewage treatment facilities, moderately advance the construction of sewage treatment facilities, and newly renovated and expanded 13 sewage treatment plants, adding 340,000 tons/day of sewage treatment capacity. To further improve the efficiency of the transmission network, the concentrations of CODcr and BOD5 in the inlet water of urban and township sewage plants are greater than 280, 110 mg/l, 230 mg/L and 85 mg/L, respectively. For urban sewage plants whose inlet concentration is not up to standard, a "one plant, one policy" system is implemented. Sewage treatment plants close to residential areas and environmentally sensitive areas have been fully deodorized, and the construction of high-standard environmentally friendly sewage treatment plants has been encouraged.

2. Improve the coverage of sewage networks. Focus on the improvement of collection capacity, with the focus on the urban (town) suburb junction, urban villages, old streets, township industrial concentration areas and main traffic roads along the sewage network blank areas and empty points list. Further optimize the layout of the sewage pipe network in urban built-up areas, expand the coverage, weave the collection pipe network, build the main network of 394 kilometers, basically eliminate the blank area of the pipe network, and enhance the sewage collection and transportation capacity. We will strengthen the diversion of rain and pollution in temporary and acute terminal interception areas, and strive to promote the diversion of rain and pollution with higher standards in combination with the renovation of old residential areas and the improvement of inferior Class V water bodies. Strengthen the testing and repair of sewage pipe networks, and by the end of 2022, basically complete the testing of drainage pipe networks in urban built-up areas, complete the construction of drainage pipe network geographic information system (GIS), and organize the implementation of pipe network renovation and repair in planned areas, so as to effectively improve the efficiency of sewage collection.