Rural area domestic sewage ecological treatment method and system

Abstract

The invention provides a rural area domestic sewage ecological treatment method which includes the steps: (1) collecting domestic sewage and performing centralized regulation and pretreatment; (2) treating nutrient substances; (3) treating submerged plants; (4) treating a clear water ecological system. The treated sewage reaches surface water IV-class and even III-class standards and then is discharged into nearby rivers and lakes, and dystrophication impact load is effectively reduced. A traditional sewage treatment technology is combined with a water ecological system repair technology, andthe domestic sewage is discharged into the rivers and lakes after deep treatment to protect surface water environments. The invention further provides a corresponding treatment system which is simpleto implement, low in cost and good in effect, excessive pipe network projects and lands are omitted, the system can be automatically maintained and operated after proper adjustment and improvement after one-time input, and manual management cost is reduced.

Description

technical field [0001] The invention belongs to the field of domestic sewage treatment, and in particular relates to an ecological treatment method and system for domestic sewage in rural areas. Background technique [0002] With the promulgation of policies and regulations such as the national "Water Pollution Prevention and Control Action Plan" and "Guidelines for Urban Black and Odor Water Treatment", my country has increased the comprehensive control of water pollution in rivers and lakes. When controlling polluted rivers and lakes, the primary task is to Interception and treatment are carried out for various pollution sources in the river and lake basins. Centralized interception and treatment of pollution sources in the urban section of rivers and lakes is relatively easy to implement. However, in remote areas such as rural areas, due to the scattered pollution sources, long-distance laying of pipe networks for centralized treatment after collection is relatively expensi...

AI Technical Summary

Problems solved by technology

However, these technologies have their own advantages and disadvantages. For example, the artificial wetland technology needs to build pretreatment facilities at the front end, and the land rapid infiltration technology has low treatment efficiency and poor treatment effect. In addition, both of them will have clogging problems in the later stage of operation. The operation and maintenance of the sewage treatment system has high technical requirements for workers

The effluent of these treatment processes can only meet the first-level A or first-level B standard in my country's "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). Compared with the national surface water environmental quality standard (GB3838-2002), The nutrient content of the effluent is still high, and there are still risks of eutrophication and black odor in the treated sewage such as rivers and lakes.

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