Tower type earthworm and ecological filter for treating sewage

Abstract

The invention provides a combined process of tower angleworm bio-filters and constructed wetlands for treating the domestic sewage. The combined process comprises the following steps: firstly, the sewage enters a hydrolysis-acidification pool and stabilizes after the action, and the water quantity is adjusted; secondly, the domestic sewage in the hydrolysis-acidification pool is distributed into a hydrolysis-acidification pool for removing COD, total nitrogen, nitrogen-nitrogen, total phosphorus and pathogeny microbes; and thirdly, the tail water in the second step enters a constructed wetland to be subjected to strengthening treatment, thereby building a suitable waterfront surroundings landscape, or the tail water is recycled by serving as reclaimed water. The combined process has the following advantages: firstly, the system hydraulic loading is high, and the surface hydraulic loading can reach 1m<3> / m<2>*d, thereby greatly saving land; and secondly, under the high hydraulic loading, the total nitrogen removal rate of the system can reach more than 85 percent; the removal rates of other materials in the system are all more than 90 percent, the effluent reaches the primary standard of the national sewage comprehensive emission standard (GB8978-1996), and reaches the miscellaneous domestic water quality standard of the PRC construction standard (CJ25.1-89), thereby being able to be recycled by serving as the reclaimed water.

Description

technical field [0001] The invention relates to the treatment of domestic sewage, in particular, the domestic sewage and runoff pollution produced in relatively concentrated residential areas in villages and towns are treated by using a combined process of a tower type earthworm ecological filter combined with an artificial wetland. Background technique [0002] Promoting the prevention and control of rural water pollution and ensuring the safety of water supply are important measures for building a new socialist countryside. In 2005, the Ministry of Construction organized a survey of some villages across the country, showing that 96% of the villages did not have drainage ditches and sewage treatment systems; at the same time, with the development of tourism and real estate in my country, a large number of tourist attractions, sanatoriums, villas, and residential areas were built. . However, after these facilities solved the water supply problem, due to various reasons, they...

AI Technical Summary

Problems solved by technology

[0003] At present, there are the following problems in the treatment of sewage in villages and towns: (1) Technically, there are few decentralized treatment processes that can meet the large amount of sewage

[0004] If these problems are not solved and matured technically, they will definitely affect the process of sewage treatment in villages and towns, and will inevitably affect the process of eutrophication control in key river basins.

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