Method for improving sewage purification effect of combined vertical subsurface flow type artificial wetland

Abstract

The invention belongs to the technical field of environmental engineering, and particularly relates to a method for improving the sewage purification effect of a combined vertical subsurface flow type artificial wetland. The method comprises the following steps: firstly, artificially simulating carbon-load-different influent water concentrations of sewage; secondly, combining vertical subsurface flow type artificial wetlands two by two; then, testing the sewage purification effect of each combined vertical subsurface flow type artificial wetland under the condition of different influent water carbon load ratios, and determining the optimal influent water carbon load ratio and the combination type of the vertical subsurface flow type artificial wetlands; and finally, by using a method of adding methanol or urea or a method of mixing domestic sewage and industrial waste water in the actual sewage treatment process, enabling the pollutant load of raw sewage to reach the previously determined optimal influent water carbon load ratio, and treating with the previously determined combination type of the vertical subsurface flow type artificial wetlands. According to the method, the sewage purification effect of the combined vertical subsurface flow type artificial wetland can be obviously improved; and the method is simple and easy to implement and convenient to operate, and has good economic returns.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a method for improving the sewage purification effect of a combined vertical underflow artificial wetland. Background technique [0002] At present, constructed wetlands have become a very promising way to deal with pollutants. Constructed wetlands are often used to treat sewage to purify ecosystems, and are developing rapidly because of their good economic benefits. Constructed wetlands can be used in conjunction with natural wetlands, sewage treatment plants and other treatment facilities, which can better treat organic matter in sewage under different pollutant loads. However, for single-stage constructed wetlands, although the removal rate of Chemical Oxygen Demand (COD) is high, the removal rate of Total Nitrogen (TN) and Total Phosphorus (TP) is always difficult. reach a higher level. In particular, the treatment capacity of constructed wetl...

AI Technical Summary

Problems solved by technology

However, for single-stage constructed wetlands, although the removal rate of Chemical Oxygen Demand (COD) is high, the removal rate of Total Nitrogen (TN) and Total Phosphorus (TP) is always difficult. reach a higher level

In particular, the treatment capacity of constructed wetlands fluctuates greatly for sewage with various influent carbon load ratios, because the aerobic and anaerobic environments of single-stage constructed wetlands are poor

For example, a single-stage constructed wetland cannot provide aerobic and anaerobic environmental conditions at the same time, so it is difficult to obtain a relatively high TN removal rate under the condition of high-load carbon (C) and nitrogen (N) element inflow.

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