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Status quo and development trend of urban water treatment

2015-12-23 20:42:10

1, the current situation of urban water supply

By the end of 2014 China has 750 cities officially, 1,818 counties, 26,001 towns. By the end of 2014, the number of national public water supply plant has nearly twenty thousand, of which there are 6,001 counties, the town has 16 008; water supply capacity of 530 million cubic meters / day; the total annual supply of 86.8 billion cubic meters; from water penetration, the city, county and town, respectively 97.6%, 88.1% and 81.7%; urban public water supply coverage was 91.7 percent, the county was 82.5%; public water supply pipe network leakage rate of towns is still relatively high, city 15.5%, 13.6% county.

2, the current situation of urban sewage treatment

Treatment of urban waste water from the status quo, as of the end of 2014, there were 5,300 sewage treatment plants, sewage treatment capacity of 163 million cubic meters / day, sewage treatment capacity of 45 billion cubic meters has been reached, resulting in the amount of wet sludge There are 30 million tons; sewage treatment rate of the city and county have already reached 89% and 78%; urban centralized sewage treatment rate reached 85 percent, the county's centralized sewage treatment rate reached 76%; urban sewage treatment for national energy conservation The contribution rate, from 2013, the annual reduction in the amount of COD and NH3-N, respectively, to reach 11.2 million tons and 100 million tons.

From the current emission standards for the country's urban sewage treatment execution, we mainly do is level B standard, by size to statistics, nearly 50 percent of the sewage treatment plant are performing a level B standard, 25 percent of the sewage treatment plant the implementation of an A standard, and nearly 25 percent of the wastewater treatment plant are performing a secondary standard, in addition to some of the wastewater treatment plant is to reach four types of environmental standards for surface water, the standard is very high.

From sludge treatment and disposal, the current or most of our sludge to landfill mainly into organic fertilizer, building materials and engineering backfill sludge rare. The disposal and resource recycling, harmless sludge we have a lot of work to do, which is key direction "five" and the next "Thirteen Five" work.

氨基三甲叉膦酸

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