Process method for stairway composite ecological bed clarified sewage and ecological bed thereof

Abstract

The invention discloses a treatment method for purifying sewage with a ladderlike integral ecological bed. Sewage flows through a three-step integral ecological bed to be treated as nitrification, denitrification, denitrogenation and oxygen enrichment and phosphorus removal, thereby ensuring the stability of the purified outlet water. A water inlet pipe of the ladderlike integral ecological bed is communicated with a perforated water-distributing pipe above the first grade integral ecological bed and a water-gathering weir between the second grade and the third grade of the integral ecological bed, and the sewage is distributed in a free overfall method; the bottom part of the first integral ecological bed is provided with a perforated water-collecting pipe which is communicated with the perforated water-distributing pipe of the second ecological bed; the bottom part of the second integral ecological bed is provided with a water-collecting pipe to guide the outlet water into the water-gathering weir, and the outlet hole of the water-gathering weir is communicated with the perforated water-distributing pipe above a third grade integral ecological bed which is provided with the perforated water-collecting pipe at the bottom part to be communicated with the water outlet pipe. Optimizing the bed structure and the water-distributing system, and adopting the technique of enforcing natural reoxygenation without energy consumption, the invention has the advantages of low cost and steady treatment effect.

Description

Technical field [0001] The invention relates to the purification and restoration technology of polluted water bodies, in particular to a method for the restoration of polluted water bodies and the purification treatment of domestic sewage under the optimized combination of fillers and different enhanced natural reoxygenation methods, and a stepped composite ecological bed. Background technique [0002] Eco-bed is a system used for sewage treatment based on the form of constructed wetland for the purpose of increasing system load, reducing floor space and filling costs. For the restoration of polluted water bodies and the treatment of small-scale, low-concentration point and non-point source sewage in cities and towns (villages and towns), ecological bed technology has attracted more and more attention due to its low investment, low operating cost, and convenient management. [0003] According to the different water surface position and water flow direction of the sewage in the ec...

AI Technical Summary

Problems solved by technology

Therefore, its application will be limited in large cities with tight land use

[0006] ②The intercepted suspended matter accumulates in the ecological bed, and the continuous growth of microorganisms in the bed will weaken the seepage capacity of the matrix layer, eventually causing blockage, turning the subsurface flow ecological bed into a surface flow ecological bed, resulting in a decline in treatment capacity; Moreover, the continuous accumulation of organic matter will gradually move to the ecological bed and the outlet, which will eventually affect the quality of the effluent.

[0007] ③The ecological bed system usually has the problem of insufficient oxygen supply, which directly leads to the low removal rate of nitrogen, phosphorus, especially nitrogen in the system, and affects the treatment effect of the ecological bed

Although the measures of artificial oxygen increase such as oxygen supply have been adopted, the traditional oxygen increase method has the defect of high energy consumption, which reduces the economic advantages of the ecological bed

[0008] In addition, the Chinese patent number is ZL200510057047.2, and the title of the invention is "baffled wetland filter + lateral subsurface flow wetland bed sewage treatment system and method", which discloses a sewage treatment system with high volume utilization rate and no need for additional power supply. Its water flow is horizontal baffle flow, and reoxygenates the plane atmosphere; compared with the water flow, which is vertical flow and falling water reoxygenation, the efficiency is lower; and there is a problem of complex structure

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