Two years ago, the outbreak of cyanobacteria in Taihu Lake led to the drinking water crisis in Wuxi City, Jiangsu Province, and also launched a national action to control the Taihu Lake, protect water sources, and rebuild ecological homes. Governments at all levels along the lake have clearly realized that the problem lies in the water, but the roots are on the shore. Therefore, controlling the source of sewage interception has become the top priority of Taihu Lake governance.
After two years of hard work, the Taihu Lake has achieved initial results, and the water quality has shown four “improvementsâ€. It is reported that as of now, the density of algae in five centralized drinking water sources in Taihu Lake ranges from 400,000 to 6.6 million per liter, and the algae density is lower than the historical period.
Fu Daguan minor light structure
In the battle against the interception of pollution in the Taihu Lake, Jiangsu Province took the “supporting the small and adjusting the light structure†as the first battle.
In August 2007, Wuxi City launched a special campaign to close the “five small†and “three high and two low†enterprises. In less than two years, the city has closed 1412 “five small†and “three high and two low†enterprises. After the closure of these enterprises, not only did they not affect the economic operation of Wuxi, but the quality of economic operations was further improved. In the past two years, Wuxi’s GDP growth has still reached more than 15%.
According to statistics, in the two years, Jiangsu has closed and banned more than 2,870 “three highs and two lows†enterprises along the Taihu Lake Basin, reducing the annual chemical oxygen demand emissions by more than 20,000 tons.
After shutting down a large number of “three highs and two lows†enterprises, Jiangsu Province has used the valuable space to develop “light†industries and “green†industries, creating favorable conditions for the development of precision machinery and electronic information industries. The quality of economic operations has embarked on a higher platform.
Promote the transformation of six major industries
Jiangsu Province took the lead in implementing the upgrading and advanced treatment projects for the six key industries of textile dyeing and finishing, chemical, paper, steel, electroplating and food along the lake. More stringent emission standards were implemented for more than 960 key enterprises, and the total amount of pollutants was further reduced from the source.
At the same time, in order to ensure the smooth progress of the upgrading and upgrading project, Jiangsu Province has increased its investment in upgrading the project, and supported the construction of industrial and commercial capital, private capital, foreign capital, mergers and acquisitions, project financing, etc. And the diversification, socialization and marketization of operations. In addition, the environmental protection departments at all levels, together with the financial departments, supported the construction of the upgrade project through the “substitute award†approach; Jiangsu Province allocated 150 million yuan from the special fund for the prevention and control of water pollution in Taihu Lake. Engineering; Jiangsu Provincial Environmental Protection Department will also draw some funds from the provincial pollution prevention and control funds to support the upgrade project; the counties (cities, districts) in Taihu District draw 10-20% of the new financial resources, special for water Pollution control has laid a solid foundation for upgrading and upgrading the contract as scheduled.
Intercepting the sewage pipe to block the sewage outlet
Since the second half of 2007, Jiangsu Province has comprehensively promoted the construction of sewage treatment facilities, built more than 2,600 kilometers of urban sewage pipe network, and accelerated the elimination of blank towns for sewage treatment facilities.
As of the end of last year, sewage treatment plants have been built in towns and towns above Wuxi, and the daily sewage treatment scale has reached more than 1.5 million tons. Among them, in 2007 and 2008 alone, it invested 700 million yuan to build a sewage treatment facility with a daily processing capacity of 470,000 tons, and the treatment scale has increased by 45%. The 68 sewage treatment plants in the city have been upgraded and upgraded to the end of last year. The upgrading project has been completed, and the water quality of the factory has reached the new standard for wastewater discharge in the Taihu Basin. In two years, Wuxi City has built a total of 3,410 kilometers of sewage pipe network, which has exceeded the sum of historical construction. Within this year, Wuxi will also fully cover the sewage main network, bringing the centralized treatment rate of domestic sewage in the main urban area of ​​Wuxi to 85%, the urban areas of counties (cities, districts) to reach over 84%, and the township built-up areas to reach 62%.
In the past two years, Wuxi has taken a strong blocking of the sewage outlet along the lake as a rigid task. At present, the city has forcibly blocked 207 sewage outlets along the lake and the main river channel along the lake. This year, 169 sewage outlets of 227 enterprises will be blocked.
There are 9 key points in Yixing City that enter the lake channel. Since July 2007, Yixing has carried out GPS positioning, numbering and photographing of all the sewage outlets of industrial enterprises, residential areas and tertiary units on both sides of the Taihu River, and established special files. Recently, 163 sewage discharges in Yixing City The mouth sealing work has been fully completed. This year, Yixing City carried out the sealing work for the remaining 86 sewage outlets, taking sewage treatment, reclaimed water, sewage transportation, shutting down and turning four measures to ensure that the sewage outlets are blocked.
Regional pollution control
Yanqiao River is a main river into the lake. Since last year, Jiangsu Province has established the goal of rectification of the Yanqiao River: by 2012, the water quality of the river will be significantly improved. The water quality of ammonia, total phosphorus and other indicators of 37 major rivers on both sides of the river should meet the IV category. Water function requirements, chemical oxygen demand, ammonia nitrogen, total phosphorus should be reduced by 20%, 62% and 54% respectively compared with 2007, the centralized treatment rate of industrial wastewater should reach more than 90%, and the treatment rate of domestic sewage in key villages should reach 90% or more. .
In order to achieve the goal of improving the water quality of Yanqiao River, Yixing City has taken various measures such as controlling sources and intercepting pollutants to focus on comprehensive river improvement. Wujin District carried out comprehensive environmental improvement in the area of ​​188 square kilometers in the Yanqiao River Basin, and initiated the construction of 25 remediation projects. Up to now, 18 projects have been completed.
After two years of hard work, the Taihu Lake has achieved initial results, and the water quality has shown four “improvementsâ€. It is reported that as of now, the density of algae in five centralized drinking water sources in Taihu Lake ranges from 400,000 to 6.6 million per liter, and the algae density is lower than the historical period.
Fu Daguan minor light structure
In the battle against the interception of pollution in the Taihu Lake, Jiangsu Province took the “supporting the small and adjusting the light structure†as the first battle.
In August 2007, Wuxi City launched a special campaign to close the “five small†and “three high and two low†enterprises. In less than two years, the city has closed 1412 “five small†and “three high and two low†enterprises. After the closure of these enterprises, not only did they not affect the economic operation of Wuxi, but the quality of economic operations was further improved. In the past two years, Wuxi’s GDP growth has still reached more than 15%.
According to statistics, in the two years, Jiangsu has closed and banned more than 2,870 “three highs and two lows†enterprises along the Taihu Lake Basin, reducing the annual chemical oxygen demand emissions by more than 20,000 tons.
After shutting down a large number of “three highs and two lows†enterprises, Jiangsu Province has used the valuable space to develop “light†industries and “green†industries, creating favorable conditions for the development of precision machinery and electronic information industries. The quality of economic operations has embarked on a higher platform.
Promote the transformation of six major industries
Jiangsu Province took the lead in implementing the upgrading and advanced treatment projects for the six key industries of textile dyeing and finishing, chemical, paper, steel, electroplating and food along the lake. More stringent emission standards were implemented for more than 960 key enterprises, and the total amount of pollutants was further reduced from the source.
At the same time, in order to ensure the smooth progress of the upgrading and upgrading project, Jiangsu Province has increased its investment in upgrading the project, and supported the construction of industrial and commercial capital, private capital, foreign capital, mergers and acquisitions, project financing, etc. And the diversification, socialization and marketization of operations. In addition, the environmental protection departments at all levels, together with the financial departments, supported the construction of the upgrade project through the “substitute award†approach; Jiangsu Province allocated 150 million yuan from the special fund for the prevention and control of water pollution in Taihu Lake. Engineering; Jiangsu Provincial Environmental Protection Department will also draw some funds from the provincial pollution prevention and control funds to support the upgrade project; the counties (cities, districts) in Taihu District draw 10-20% of the new financial resources, special for water Pollution control has laid a solid foundation for upgrading and upgrading the contract as scheduled.
Intercepting the sewage pipe to block the sewage outlet
Since the second half of 2007, Jiangsu Province has comprehensively promoted the construction of sewage treatment facilities, built more than 2,600 kilometers of urban sewage pipe network, and accelerated the elimination of blank towns for sewage treatment facilities.
As of the end of last year, sewage treatment plants have been built in towns and towns above Wuxi, and the daily sewage treatment scale has reached more than 1.5 million tons. Among them, in 2007 and 2008 alone, it invested 700 million yuan to build a sewage treatment facility with a daily processing capacity of 470,000 tons, and the treatment scale has increased by 45%. The 68 sewage treatment plants in the city have been upgraded and upgraded to the end of last year. The upgrading project has been completed, and the water quality of the factory has reached the new standard for wastewater discharge in the Taihu Basin. In two years, Wuxi City has built a total of 3,410 kilometers of sewage pipe network, which has exceeded the sum of historical construction. Within this year, Wuxi will also fully cover the sewage main network, bringing the centralized treatment rate of domestic sewage in the main urban area of ​​Wuxi to 85%, the urban areas of counties (cities, districts) to reach over 84%, and the township built-up areas to reach 62%.
In the past two years, Wuxi has taken a strong blocking of the sewage outlet along the lake as a rigid task. At present, the city has forcibly blocked 207 sewage outlets along the lake and the main river channel along the lake. This year, 169 sewage outlets of 227 enterprises will be blocked.
There are 9 key points in Yixing City that enter the lake channel. Since July 2007, Yixing has carried out GPS positioning, numbering and photographing of all the sewage outlets of industrial enterprises, residential areas and tertiary units on both sides of the Taihu River, and established special files. Recently, 163 sewage discharges in Yixing City The mouth sealing work has been fully completed. This year, Yixing City carried out the sealing work for the remaining 86 sewage outlets, taking sewage treatment, reclaimed water, sewage transportation, shutting down and turning four measures to ensure that the sewage outlets are blocked.
Regional pollution control
Yanqiao River is a main river into the lake. Since last year, Jiangsu Province has established the goal of rectification of the Yanqiao River: by 2012, the water quality of the river will be significantly improved. The water quality of ammonia, total phosphorus and other indicators of 37 major rivers on both sides of the river should meet the IV category. Water function requirements, chemical oxygen demand, ammonia nitrogen, total phosphorus should be reduced by 20%, 62% and 54% respectively compared with 2007, the centralized treatment rate of industrial wastewater should reach more than 90%, and the treatment rate of domestic sewage in key villages should reach 90% or more. .
In order to achieve the goal of improving the water quality of Yanqiao River, Yixing City has taken various measures such as controlling sources and intercepting pollutants to focus on comprehensive river improvement. Wujin District carried out comprehensive environmental improvement in the area of ​​188 square kilometers in the Yanqiao River Basin, and initiated the construction of 25 remediation projects. Up to now, 18 projects have been completed.
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