Water circulation giant system based on near zero emission of industrial parks

Abstract

The invention provides a water circulation giant system based on near zero emission of industrial parks. Reclaimed water obtained by treating sewage generated by an urban domestic water system and water taken from part of river sub-systems are used as two main water sources of the industrial parks; the reclaimed water or the water treated by sewage regeneration equipment can meet the water qualityrequirements of different types of industrial enterprises, and the process water is drained into constructed wetlands near the parks; the sewage generated by each industrial enterprise is collected into the sewage treatment equipment of the industrial parks to be treated to reach the surface water class IV standard, and is regenerated and reused by production enterprises, and domestic sludge is cured by compost and used to improve the saline-alkali soil around the parks. In view of the defects in the system, the invention provides the water circulation giant system based on near zero emissionof industrial parks to improve water circulation utilization efficiency and recycle pollutants.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a giant water circulation system based on zero discharge in industrial parks. Background technique [0002] Since the 12th Five-Year Plan, my country's GDP has increased from 48930.06 billion yuan in 2011 to 68905.21 billion yuan in 2015. The total economic volume has increased by 41.8%, and the water ecological environment has also maintained a stable and improving trend. However, the situation that the total amount of pollutant discharge is large remains unchanged. According to the total emissions of COD and ammonia nitrogen in the China Environmental Status Bulletin in 2011 and 2012, the total amount is on a downward trend, among which COD from industrial sources and domestic sources accounted for 51.75% and 51.62%, and ammonia nitrogen accounted for 67.51% % and 67.47%. It can be seen that industrial sources and domestic sources have become the main factors...

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Problems solved by technology

[0003] At present, many cities in my country have built urban domestic sewage treatment plants and industrial parks, and the government also requires water resources demonstration of construction projects, and has requirements for water sources and discharge quality of construction projects and industrial parks, but towns and industrial parks The discharge standard of the sewage treatment plant only reaches Grade A (the pollutant discharge standard of urban sewage treatment plant GB18918-2002), and it is still inferior to Class V water. At the same time, a large amount of sludge produced cannot be treated. Cause secondary pollution to the ecological environment, and can not achieve zero emissions

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