Method for sewage treatment in compound tower-type ecological filtering pool

Abstract

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method for sewage treatment in a compound tower-type ecological filtering pool. The method disclosed by the invention comprises the following steps of: collecting the domestic sewage of residents by a sewage tube network, removing suspended substances in the sewage via thick and thin grids, and pre-treating the sewage; pumping the sewage in the compound tower-type ecological filtering pool formed by connecting a one-stage high-level water distribution anaerobic filtering pool and a multi-stage earthworm trickling filtering pool in series via a sewage pump; automatically flowing, collecting and distributing the sewage via the action of gravity; and achieving the purpose of purifying the sewage via the synergistic effect of microorganisms, filter material, animals (earthworms) and plants in the filtering pool. The method for sewage treatment in a compound tower-type ecological filtering pool disclosed by the invention combines with traditional sewage treatment process and land treatment method, has the advantages of being good in water yielding effect, simple in operation and management, small in floor area, low in construction cost and the like, and has good economic effects and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and in particular relates to a method for treating dispersed sewage by using an ecological filter. Background technique [0002] The outbreak of cyanobacteria in the lake water body leads to the decrease of the transparency of the lake, the degradation of the ecosystem structure and function, the water quality and water shortage, and causes serious economic losses. The main reason is the input of nutrients such as N and P from the rivers entering the lake. Domestic sewage (including urban and rural domestic sewage), aquaculture wastewater, agricultural non-point sources and soil erosion in the watershed are the main forms of lake exogenous pollution, bringing a large amount of N and P nutrients into the lake. In the watersheds of different regions, the input ratios of various forms of N and P are different. For example, studies have shown that in the Taihu Lake ...

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Problems solved by technology

[0003] Rural domestic sewage is treated differently from urban domestic sewage. Urban residents live in a concentrated manner, which is conducive to the establishment of a complete sewage pipe network to collect sewage for centralized treatment. However, rural residents are relatively scattered, and the investment in building a large-scale sewage pipe network is relatively large, and the long-distance Sewage transportation is more serious, and the sewage collection rate is not high, so it is not suitable to adopt the method of urban sewage treatment for centralized treatment

The vast rural areas in my country mainly adopt decentralized small-scale domestic sewage treatment processes, which have been developed and divided into two categories according to different treatment methods: one is the traditional sewage treatment method, including A / O process, aeration / micro-aeration Biofilter, etc. This type of treatment process has stable water output, low infrastructure costs, and small footprint, but high operating costs and complicated operation and management; the second is land treatment methods, such as artificial wetlands, biological ponds, etc., with good water output effects , Simple operation and management, low operating cost, but the disadvantage is that it occupies a large area and the infrastructure cost is relatively high