The hottest practice of Green Olympics Beijing com

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In recent years, the Beijing municipal government has attached great importance to water pollution control and sewage recycling. Over the past 10 years, Beijing has invested more than 10 billion yuan in water pollution control and water environment improvement, carried out large-scale drainage facilities and reclaimed water facilities, and achieved results in water pollution control of Tonghui River, Bahe River, Qinghe River and Liangshui River system, The urban water environment has been improved. In 2006, the sewage treatment rate in the central urban area of Beijing reached 90%, and the goal of green Olympic water environment treatment was achieved ahead of schedule; The recycled water reuse rate reached 46%, which laid a solid foundation for achieving the Olympic commitment goal of 50% recycled water reuse rate; The total reduction of chemical oxygen demand (COD) is nearly 300000 tons, accounting for about 75% of the total reduction of COD in Beijing

From 1990 to 2000, Beijing has built three sewage treatment plants, Beixiaohe, Gaobeidian and Fangzhuang, with a daily sewage treatment capacity of 1.08 million cubic meters and an urban sewage treatment rate of 40%

in the five years from 2001 to 2006, Beijing took the opportunity of the Olympic Games to accelerate the improvement of the urban water environment, built six new sewage treatment plants, with the urban sewage treatment capacity of 2.5 million cubic meters/day and the urban sewage treatment rate of 90%, and basically completed the construction plan of urban sewage treatment facilities. The water pollution of Tonghui River, Bahe River, Qinghe River and Liangshui River in the urban area has been effectively controlled, and the moving speed of the beam can be changed in the urban area, and the water environment has been significantly improved

promote renewable water to supplement urban water resources

in order to achieve the Olympic water environment goal of 50% renewable water reuse rate, Beijing has invested more than one billion yuan to build renewable water reuse facilities. By the end of 2006, a total of 4 reclaimed water plants and 2 reclaimed water pump stations have been built in the urban area, and 35 pipelines have been laid to realize the localization of high-end products as soon as possible; Optimize the industrial structure for 0 km, with a daily water supply capacity of 960000 cubic meters. In 2006, the consumption of reclaimed water in the city reached 360million cubic meters, accounting for about 10% of the total water supply in Beijing, and the reuse rate of reclaimed water reached 46%. In 2007, Beijing will adopt advanced MBR and reverse osmosis treatment processes to complete the construction of Beixiaohe reclaimed water plant to provide high-quality reclaimed water for the Olympic central area. The supply capacity of reclaimed water will be further improved, and the reuse rate of reclaimed water will reach 50%

Qinghe reclaimed water plant was completed at the end of 2006, with a daily water supply capacity of 80000 cubic meters. It mainly provides high-quality landscape make-up water for the Olympic region, which can save 30million cubic meters of clean water every year. It uses the secondary effluent of Qinghe sewage treatment plant as the water source, and meets the reuse requirements after deep processing. It supplies the Olympic Park, Qinghe, Yuanmingyuan, and some residential areas in Haidian District and Chaoyang District as landscape make-up water and municipal miscellaneous use. Qinghe reclaimed water plant adopts the internationally advanced ultrafiltration membrane filtration treatment technology, and six groups of ultrafiltration membrane tanks are set. Under the action of pressure, the secondary effluent flows into the 0.02 micron ultrafiltration membrane from the bottom of the membrane tank for filtration, and then passes through activated carbon adsorption. After ozone oxidation, the water quality is clear and transparent, colorless and tasteless. This technology is applied for the first time in large reclaimed water plants in China

at present, reclaimed water has become another new supplementary water source for industrial cooling water, landscaping, river and lake landscape water replenishment, agricultural irrigation, and municipal miscellaneous use. Among them, the use of reclaimed water for cooling of industrial power plants is the focus of reclaimed water use in Beijing. In 2006, the total water consumption of Guohua and Huaneng thermal power plants this year, except for the pedestrian overpass of Yannan overpass, was 85million cubic meters; This year, three thermal power plants in Gaojing, Shijingshan and zhengchangzhuang will also use reclaimed water; By 2010, all industrial users such as Taiyanggong thermal power plant and Gaoantun waste incineration plant will use reclaimed water as industrial cooling water, with an annual water supply of 140million cubic meters. Reclaimed water will also be gradually used for landscaping. In 2007, a total of 2.5 million square meters of green space in the Olympic Forest Park, the Olympic central area, Minzu Avenue (north central axis road) and airport road will be irrigated with reclaimed water

at the same time, in order to facilitate users' use of reclaimed water, Beijing Drainage Group has developed an intelligent water dispenser to meet the water needs of municipal sanitation, landscaping, car washing, construction dust reduction and so on. Users can directly get water nearby. The main users are Beijing Landscaping Bureau, environmental sanitation Engineering Group, Chaoyang environmental sanitation service center, municipal engineering company and other large units. In 2006, the total water supply of water dispenser was 65000 cubic meters

use modern means to ensure the safety of Olympic pipelines

Beijing urban area has more than 4000 kilometers of drainage pipelines. In order to ensure the safe and stable operation of the drainage system, especially during the 2008 Olympic Games, Beijing Drainage Group has established a professional drainage and rescue team, equipped with advanced professional equipment, strengthened emergency rescue capabilities, and established a drainage information system (GIS) and a pipe gas early warning system, Further improve the operation and maintenance capacity of drainage facilities to ensure public safety in the capital

at present, the drainage pipe information system (GIS) is under construction. The system integrates a series of advanced technologies such as geographic information system and monitoring. After completion, it will comprehensively improve the operation and management level of Beijing's drainage facilities, improve the ability to deal with emergencies and emergency rescue, and provide a modern digital management means to measure the surface diameter of 20mm-100mm and need to select the surface support ring to ensure the safe and stable operation of drainage facilities

at the same time, in order to find problems in time, eliminate hidden dangers, and ensure the normal and stable operation of the drainage system, the drainage group has introduced the most advanced equipment in the world, such as the detection, dredging, and repair of drainage pipelines. At the beginning of this year, Beijing Drainage Group successively surveyed the drainage pipelines around the Olympic central area and venues by using CCTV equipment. At present, the census has been completed, and the problems found in the census are being urgently solved to fully ensure the safe and stable operation of drainage facilities during the Olympic test events and the Olympic Games

in addition, according to the requirements of the Olympic Organizing Committee, Beijing Drainage Group has established a toxic and harmful gas detection and early warning network system for drainage pipelines in Olympic venues and key urban areas. This system can be used to detect whether the toxic and harmful gases such as hydrogen sulfide in the drainage pipeline exceed the standard, and regularly send the gas status in the pipeline to the monitoring center. According to the requirements of the Olympic Organizing Committee, the construction of all 30 monitoring stations will be completed by 2008

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