Circulating zero-valent iron biofilter for strengthened treatment of rural domestic wastewater
A biofilter and domestic sewage technology, applied in aerobic process treatment, sustainable biological treatment, biological water/sewage treatment, etc., to achieve the effects of low cost, convenient construction, and simple engineering structure
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[0020] A circulating zero-valent iron biofilter for intensive treatment of rural domestic sewage. Its structure is to set up multiple sewage disposal units underground; collect rural domestic sewage into the sewage disposal units through the water pipeline system for circulation and enhanced treatment. The final domestic sewage is used as agricultural irrigation water or supplemented groundwater or is directly discharged into the river; the sewage treatment unit includes: pretreatment pool, circulation pool and zero-valent iron biofilter. The structures of each treatment unit are independent of each other. The two parts are connected through pipelines; the zero-valent iron biological filter is divided into two parts: a common biological filter and a built-in zero-valent iron enhanced reaction tank.
[0021] The plurality of sewage treatment units are set underground in a fully buried or half buried manner.
[0022] The pretreatment pool mainly removes suspended solids in the r...
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