Method and apparatus for purifying and utilizing sewage for sustainable development type city

Abstract

The present invention provides one kind city sewage purifying and utilizing process and apparatus for sustained development. The city sewage purifying and utilizing process includes first filtering and precipitation to recover solid matter, planting aquatic plant to gather feed and for producing marsh gas, and purifying water in artificially marsh. The present invention can purify sewage and utilize nutrients in sewage fully to improve ecological environment around city.

Description

technical field [0001] The invention relates to the treatment technology of sewage and waste water, in particular to a sustainable development type urban sewage purification and utilization method and its device. Background technique [0002] At present, the outstanding problems in water resources are: most of the effective fresh water resources on the earth are consumed by cities, and a large amount of sewage generated by cities is not purified and utilized, and is directly discharged into the ocean, causing increasingly serious marine pollution; Most areas, especially cities, are facing an increasingly serious crisis of fresh water shortage; the crisis of fresh water resources has led to the disappearance of a large amount of surface fresh water, resulting in land desertification and the extinction and near extinction of a large number of species that depend on wetlands for survival, and also caused The climate has deteriorated and caused enormous damage to agriculture, ca...

AI Technical Summary

Problems solved by technology

[0002] At present, the outstanding problems in water resources are: most of the effective fresh water resources on the earth are consumed by cities, and a large amount of sewage generated by cities is not purified and utilized, and is directly discharged into the ocean, causing increasingly serious marine pollution; Most areas, especially cities, are facing an increasingly severe crisis of fresh water shortages; the crisis of fresh water resources has led to the disappearance of a large number of surface fresh water surfaces, resulting in land desertification and the extinction and near-extinction of a large number of species that depend on wetlands for survival. The climate has deteriorated and caused enormous damage to agriculture, causing many serious and irreparable damages to the global ecological balance

At present, the biggest environmental and ecological problem in most cities in the world is water shortage, especially the lack of water environment conducive to ecological balance; at the same time, a large amount of urban sewage is flowing away in vain, which will not only cause serious environmental pollution, but also It also wastes precious water resources; what is more noteworthy is that cities are the main consumers of fresh water resources on the earth, and the large consumption of fresh water resources in cities is the main cause of the earth's water resources crisis

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