A circulating zero-valent iron biofilter for enhanced treatment of rural domestic sewage

Abstract

The invention discloses a circulating zero-valent iron biofilter for strengthened treatment of rural domestic wastewater. The circulating zero-valent iron biofilter is structurally characterized in that a plurality of wastewater treatment units are arranged underground; the rural domestic wastewater is collected into the wastewater treatment units for circulating and strengthened treatment through a water pipeline system; the treated domestic wastewater is used as agricultural irrigation water or for supplementing groundwater or is directly discharged into a river; each wastewater treatment unit comprises a pretreatment pool, a circulating pool and a zero-valent iron biofilter; and the treatment units are structurally independent of one another and communicate through pipes. The circulating zero-valent iron biofilter has the advantages of low maintenance, low energy consumption, water quality impact resistance and high wastewater treatment efficiency; the advantages of intensive and ecological technical routes are coupled through only one pump, complicated drainage conditions of rural areas are coped with easily and the stability of effluent quality is ensured; and meanwhile, surface land resources are saved and the circulating zero-valent iron biofilter is simple and applicable, and is convenient to operate and manage and low in cost.

Description

technical field [0001] The invention relates to a circulating zero-valent iron biofilter for strengthening the treatment of rural domestic sewage, which can be directly applied to the treatment of rural domestic sewage or small-scale domestic sewage in villages and towns, and can also be used for the degradation of rural non-point source pollutants and water purification. It belongs to the field of environmental protection sewage treatment. Background technique [0002] Rural sewage has become an important pollution source of river and lake water pollution due to scattered areas, large population, and difficult collection. It is also an important part of rural non-point source pollution; rural sewage contains a large amount of organic matter and organic matter such as nitrogen and phosphorus. Salt, untreated rural domestic sewage is directly discharged into natural water bodies, which not only affects crop yields, but also seriously harms the ecological environment and the w...

AI Technical Summary

Problems solved by technology

As far as the current situation is concerned, there are still some limitations in the rural domestic sewage treatment system put into practical application.

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