i. basic information
jiangsu province is located in the eastern coast of the mainland of china. it is located in the yangtze river economic belt. it now has jurisdiction over 13 districts, 21 county-level cities, 20 counties, 56 municipal districts and 826 townships (757 towns and 69 townships). jiangsu has a high population density and a large total economy. by the end of 2017, the urbanization rate of the whole province reached 68.8%.
jiangsu province covers an area of 1026,000 square kilometers, spanning rivers and seashores, with dense water network and numerous lakes. the yangtze river runs 425 kilometers east-west and the beijing-hangzhou grand canal runs 718 kilometers north-south. there are more than 2900 rivers, including huaihe, yiyi, shu and sisi. in addition, there are more than 290 lakes and lakes. of the five major freshwater lakes in the country, jiangsu is second, taihu lake is the third with 2250 square kilometers, and hongze lake is the fourth with 2069 square kilometers. of the total area of 1026,000 square kilometers, the surface area of rivers and lakes is 116,700 square kilometers, accounting for 16.3%.
urban sewage treatment in jiangsu province started in the early 1980s. after nearly 40 years of development, especially since the ninth five-year plan, a large number of urban water pollution control facilities have been built in jiangsu province, focusing on the overall goal of water pollution control in the "three rivers and three lakes" of the country.
1. urban sewage treatment capacity
城市（县城）污水处理率达94.47%；建成投运城镇污水处理厂769座（县以上城市污水处理厂192座，镇级577座），城镇污水处理能力达1650万立方米/日。 in 2017, a total of 4.35 billion tons of treated water, 970,000 tons of cod reduction and 95,000 tons of ammonia nitrogen reduction were achieved.
by the end of 2017, the coverage rate of sewage treatment facilities in constructed towns in the province reached 93.3%. wuxi, xuzhou, changzhou, suzhou, nantong, huai'an and zhenjiang have achieved full coverage of sewage treatment facilities in established towns. a total of 577 municipal wastewater treatment plants have been built, with a capacity of 3.5 million cubic meters per day.
2. the quality of urban sewage treatment has been continuously improved.
municipal sewage treatment standards have been greatly improved, and all municipal sewage treatment plants above county level have achieved the first a discharge standard. the operation efficiency of sewage treatment plant is increasing year by year. in 2017, the average operating load of municipal wastewater treatment plants was 85.1%. the cumulative reduction of cod and ammonia nitrogen was 970,000 tons and 95,000 tons respectively.
3. continuous promotion of sewage reuse and sludge disposal
the utilization rate of tail water from municipal wastewater treatment plant is 15.6%. in 2017, municipal sewage treatment plants produced about 308 million tons of sludge (water content 80%) annually. there are four main disposal methods: compost accounting for 5.5%, sanitary landfill accounting for 10.2%, building material utilization accounting for 14%, incineration accounting for 65.3%, others accounting for 5%.
ii. major work
1. fully promote the basic coverage of sewage treatment facilities in constructed towns
(1) the provincial party committee and provincial government's opinion on accelerating the construction of ecological province and improving the level of ecological civilization in an all-round way (sufa no. 24, 2010) clearly put forward that by 2015, the coverage rate of sewage treatment facilities in constructed towns will reach 90%.
(2) on june 13, 2012, the provincial government issued the "provincial government's opinions on further strengthening the construction of sewage treatment facilities in constructed towns" (soviet zhengfa [2012] 73).
(3) the "full coverage planning of sewage treatment facilities in constructed towns of jiangsu province" and "full coverage planning of sewage treatment facilities in towns and towns of taihu basin of jiangsu province" were compiled.
the coexistence of various modes of construction, such as "take-over by the city side, joint construction near the city, construction by oneself and completion by oneself";
construction standards adapted to local conditions.
(4) the sewage treatment facilities in the constructed towns are in full operation.
creating the "four unified" model by innovation
construct a comprehensive sewage treatment service system of "universal benefit, sharing and equality" between urban and rural areas.
opinions on further strengthening the construction of sewage treatment facilities in constructed towns (soviet zhengfa [2012] 73): require all localities to establish a "four-unified" working mode of unified planning and layout, unified implementation and construction, unified organization and operation, and unified government supervision.
urban and rural sewage treatment as a whole
taking yixing as an example, in recent years, not only the sewage treatment capacity of yixing has increased rapidly, but also according to the principle of "unified planning, unified construction, unified operation and unified supervision", the whole city is scientifically divided into 11 sewage treatment zones for systematic planning, zoned treatment, orderly construction, unified operation and effective supervision.
2. promoting the bid-raising construction of urban sewage treatment plant scientifically
(1) tackling the key technical problems of phosphorus and nitrogen removal and bidding for urban sewage treatment plants in taihu lake basin was carried out, and 10 key technical issues were selected for public bidding in china. more than 30 top-ranking universities, research and design institutes and enterprises at home and abroad were selected to carry out research. the research results were awarded the second prize for scientific and technological progress in china.
(2) guidelines for bidding promotion and construction of urban sewage treatment plants in taihu basin. it is the first time in china to systematically study the key technologies involved in the first-level a bid-raising of municipal wastewater treatment plants, clarify the technical route of the first-level a bid-raising of municipal wastewater treatment plants, clarify the key technical links and key technical points, and obtain a series of international and domestic advanced scientific research results. a number of economical and applicable first-level a bid-raising technologies of municipal wastewater treatment plants have been studied and screened.
civil engineering does not necessarily need to be vigorously promoted in the first-level a tender promotion.
primary a tendering should be considered both in-plant and out-of-plant systems.
the difficulty of first-level a bidding is not only technology (land, negotiation, construction organization, etc.).
rationally treat the further promotion of municipal wastewater treatment plants (technology, economy and society).
3. scientific promotion of sludge treatment and disposal in urban sewage treatment plant
(1) the provincial government's "several policies and measures for promoting environmental protection" is particularly clear, and the fees for sewage treatment should be withdrawn.
(2) the provincial government has approved the notice of the provincial environmental protection department and the provincial construction department on strengthening the sewage sludge disposal work of the provincial sewage treatment plant.
(3) every five years since 2004, a general survey of the mud content of sewage treatment plants in the whole province has been carried out.
(4) to carry out technical policy research on sludge treatment and disposal in urban sewage treatment plants in jiangsu province.
(5) technical guidelines for sludge treatment and disposal of urban sewage treatment plants in jiangsu province (december 2013).
technical guidelines for sludge treatment and disposal in urban sewage treatment plants of jiangsu province
make clear the technical route according to local conditions: in the long run, land use should be given priority to, incineration and building material utilization should be supplemented, and landfill should be strictly controlled. in recent years, incineration and building materials utilization have been the main method in southern jiangsu, and land use has been supplemented, gradually reducing landfills. in central jiangsu and northern jiangsu, priority should be given to land use, and incineration and building materials utilization can be selected, and sanitary landfills can be moderately used.
strengthen social cooperation and cooperative treatment: make full use of local social and environmental resources, strengthen cooperation with garbage incineration plants, cement plants, thermal power plants, building materials plants, organic fertilizer plants and so on, and carry out cooperative treatment and disposal.
emphasis is laid on the rational layout of regional overall planning: sludge treatment facilities after dewatering should be centralized to cover the surrounding areas. centralized treatment facilities should be built in the basic units of cities at or above the county level. conditional areas can cooperate to build centralized treatment facilities across administrative regions.
(6) notice of the provincial government on the issuance of the work programme for the prevention and control of water pollution in jiangsu province
the existing sludge treatment and disposal facilities have been fully renovated, and the municipalities under the provincial jurisdiction have built sludge comprehensive utilization or permanent treatment and disposal facilities. by the end of 2020, permanent sludge treatment and disposal facilities will be fully covered in counties (cities), and the harmless disposal rate will reach 100%.
(7) implementation measures for collection, use and management of urban sewage treatment fees in jiangsu province
in the sewage treatment fee, the cost of sludge treatment and disposal should be arranged in principle not less than 0.3 yuan/cubic metre in southern jiangsu and not less than 0.2 yuan/cubic metre in other areas.
4. efforts to improve the operation and management level of urban sewage treatment plant
(1) provincial government order no. 71 "regulations for environmental protection supervision and administration of jiangsu province's sewage centralized treatment facilities": the administrative department of urban sewage centralized treatment under the local people's government at or above the county level shall strengthen supervision and management of the operation of urban sewage centralized treatment facilities.
establish the assessment criteria for operation and management of urban sewage treatment plant in jiangsu province, and assess the laboratory capacity by issuing standard samples from ten aspects.
regularly organize experts to conduct on-site inspections of municipal wastewater treatment plants, summarize experience, analyze problems and inform the whole province of assessment results.
interview with the person in charge of the wastewater treatment plant that fails to pass the examination and issue the notice of rectification one by one to request the rectification within a time limit.
assessment plays a driving role in improving the development level of the industry
improve the level of operation management (enterprises welcome guidance);
strengthened government regulation (government repurchase);
strengthen the cohesion of the industry.
clear up the thinking of industry management.
(2) provincial government order no. 71 "regulations for environmental protection supervision and management of jiangsu province's sewage centralized treatment facilities": the operating units of sewage centralized treatment facilities shall establish a system of accounting according to relevant provisions and record relevant data truthfully.
(3) the model accounts of urban sewage treatment plants in jiangsu province has been formulated and issued to further improve the management system of the accounts of urban sewage treatment plants.
(4) full coverage of personnel training: technical management personnel of sewage treatment plants, sewage treatment operators, water quality analysts; personnel training is included in the assessment of sewage treatment plants. carry out professional skills competition for sewage treatment workers and sewage testing workers in drainage industry.
(5) strengthen international exchanges and pay attention to improving the professional quality of employees in the whole industry (uk, netherlands, israel, australia, etc.).
5. unified maintenance of sewage pipeline network
"notice of the general office of the provincial government implementing and implementing the notice of the general office of the state council on the construction of urban drainage and waterlogging prevention facilities" (no. 88 issued by the soviet political office [2013]) makes the following requirements:
regulate maintenance cycles;
carry out functional inspection and structural inspection of pipelines;
promoting the marketization of maintenance operations;
promote the professional maintenance of the inner pipeline of the district by the professional team, and the maintenance funds are expended by the public finance.
in 2013, jiangsu municipal facilities maintenance quota was revised.
6. start sewage treatment in an all-round way to improve quality and efficiency, and complete sewage collection and treatment
7. industry planning and management continuously strengthened
（1）行业规划编制工作
"full coverage planning of sewage treatment facilities in constructed towns of jiangsu province" and "full coverage planning of sewage treatment facilities in towns and towns of taihu basin of jiangsu province".
(2) regulation construction and management system
"measures for environmental protection supervision and management of jiangsu province's sewage centralized treatment facilities", "measures for supervision and examination of pricing costs of jiangsu province's urban sewage treatment (trial implementation)", "notice on implementing the measures for permitting management of urban sewage discharge into drainage pipeline network", "examination criteria for operation and management of jiangsu province's urban sewage treatment plants", "model accounts of jiangsu 。
(3) publishing and issuing the implementation measures for the collection and use of sewage treatment fees in jiangsu province, and levying urban sewage treatment fees in an all-round way.
by the end of 2016, the average charge standard of sewage treatment fees for cities above county level in southern jiangsu should be adjusted to 1.5-2.0 yuan/cubic metre, and the average charge standard of sewage treatment fees for cities above county level in central and northern jiangsu should be adjusted to 1.2-1.6 yuan/cubic metre.
