Falling dry type constructed wetland grey water treatment system and method in grey-black separation mode

Abstract

The invention relates to an ash-black separation mode falling dry type constructed wetland ash water treatment system and method, the falling dry type constructed wetland treatment system comprises water collection sedimentation tank falling dry type constructed wetlands which are sequentially communicated through sewage pipelines; a peristaltic pump with a timer is arranged on the sewage pipeline; the dry type constructed wetland comprises a pool body, a substrate layer arranged in the pool body and a plant layer arranged on the substrate layer, the substrate layer comprises a ceramsite layer, a zeolite layer, a river sand layer and a large gravel layer which are sequentially arranged from bottom to top, and a water outlet is formed in the bottom of the pool body. The sewage treatment efficiency is high, the operation method is simple and convenient, maintenance is easy, and the operation cost is low.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a gray water treatment system and method for a dry-type constructed wetland in a gray-black separation mode. Background technique [0002] Domestic sewage is a key task in the improvement of rural living environment. At present, the common rural domestic sewage treatment mode chooses to uniformly manage various types of sewage generated by households, and sends the sewage to terminal treatment facilities for treatment through a complex pipe network. This method of sewage treatment for rural areas with low population density and scattered living, the cost of pipeline network construction must be extremely huge. In addition, in the mixed collection of sewage, the huge difference between grey water and black water is ignored, that is, the problem of "dilution is pollution", which not only increases the difficulty of sewage treatment, but also discards nutrients in sewage ...

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Problems solved by technology

For rural areas with low population density and scattered living in rural areas where this method is used for sewage treatment, the cost of pipe network construction is bound to be extremely huge

In addition, in the mixed collection of sewage, the huge difference between gray water and black water is ignored, which brings about the problem of "dilution is pollution", which not only increases the difficulty of sewage treatment, but also discards the nutrients in sewage , which cannot be recycled, resulting in a great waste of resources and energy

[0003] As a mature ecological treatment technology, the falling dry constructed wetland has certain advantages in treating gray and black separated gray water in situ or nearby, and reducing the cost of sewage transportation and treatment. However, at present, the traditional falling dry Constructed wetland technology often limits the efficiency of its sewage treatment due to insufficient oxygen supply, especially for the treatment of organic matter and ammonia nitrogen; and the use of artificial aeration and tidal flow to solve the lack of dissolved oxygen in Luogan constructed wetlands causes high operating costs The cost and complex control system are not suitable for application in rural areas with low economic, technological and operational management levels in our country. Therefore, it is necessary to develop a gray-black sewage treatment system with high sewage treatment efficiency, simple operation method, simple maintenance and low operating cost. It is very important to solve the problem of gray water treatment in rural areas based on gray and black separation mode by falling dry constructed wetland gray water treatment system and method in separation mode

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