System and method for treating rural sewage by using ecological system based on multi-submerged plant combinations

Abstract

The invention discloses a system and method for treating rural sewage by using an ecological system based on multi-submerged plant combinations. From the water inlet to the water outlet, the system sequentially comprises three regions in a pond, wherein a submerged plant combination A, which comprises more than any two of hydrilla, waterweed, Najas minor, curly pondweed and bog pondweed, is planted in the first treatment region; a submerged plant combination B, which at least comprises Vallisneria spiralis and vallisneria spinulosa, is planted in the second treatment region; and a submerged plant combination C, which comprises more than any two of hydrilla, waterweed, Najas minor, Vallisneria spiralis, vallisneria spinulosa, curly pondweed, bog pondweed, watermilfoil and hornwort, is planted in the third treatment region. The system and method are simple to implement, have the advantages of low cost and favorable effect, and do not need additional pipe network engineering and land; and the effluent water can achieve Grade 1 A above in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. The system can be used as a natural landscape, and has the advantages of high transparency of the water body, high biodiversity and high ecological landscape value.

Description

technical field [0001] The invention relates to a sewage treatment system and method, in particular to an artificially established ecological system based on a combination of various submerged plants containing zooplankton, microorganisms, fish, shellfish, snails and shrimps Rural sewage treatment systems and methods. It belongs to the technical field of sewage treatment. Background technique [0002] With the development of society, the adverse impact of rural sewage on the surrounding environment of rural areas and the environmental problems caused by it are becoming more and more obvious. The treatment of rural sewage has become an important issue of environmental protection. At present, the traditional rural sewage treatment method is mainly to build sewage collection pipe network and decentralized rural sewage treatment station to realize decentralized treatment, and the treatment process is mainly integrated buried sewage treatment system (aerobic or anaerobic biologi...

AI Technical Summary

Problems solved by technology

The purification capacity of these fish ponds and rivers is low, so that not only the fish ponds or rivers are polluted, but also the discharged water will still pollute the environment

[0006] 3. The construction of treatment stations requires engineering construction. The noise, solid and liquid waste, and flying dust during the construction period still have great adverse effects on the environment and people's lives. The landscape effect of the engineering facilities after completion is not good. Requires additional landscaping investment

[0007] 4. The sewage treatment station still needs some follow-up maintenance and management, and it is prone to failure. For example, the constructed wetland is prone to blockage after a long time of use

[0008] 5. Lack of effective pure ecological governance technology

There is no attempt to use a variety of submerged plants in organic combinations for sewage treatment, and there is no precedent for using an ecosystem based on a variety of submerged plants in organic combinations to treat sewage

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