Plant root layered membrane-forming enhanced water body repairing method for biological denitrification

Abstract

The invention provides a plant root layered membrane-forming enhanced water body repairing method for biological denitrification, and relates to the technical field of the biological denitrification of surface water. The invention provides the plant root layered membrane-forming enhanced water body repairing method for the biological denitrification, which comprises the following steps of: based on the conventional ecological floating island and floating bed, adequately using the developed plant root system to be taken as a carrier for growing and breeding denitrified microorganism, respectively carrying out the layered fixation of anaerobic denitrifying bacteria and aerobic denitrifying bacteria, and adequately using the plant root exudates to be taken as a denitrification carbon source, so that the aim of the biological denitrification of the enhanced water body can be achieved. According to the method, after the plant is acclimatized and formed with the membrane in a layered way, the part which is nearer to the root region forms into an anoxic region which is applicable to the growing and the breeding of the facultative or anaerobic microorganism, to promote the anaerobic denitrification of the microorganism; and the part which is further away from the root region forms into an aerobic region which is applicable to the growing and the breeding of the aerobic microorganism, to promote the nitratlon reaction of the microorganism.

Description

technical field [0001] The invention relates to the technical field of biological denitrification of surface water, in particular to a method for plant root layering film-hanging to strengthen water restoration for biological denitrification. Background technique [0002] my country's lakes, reservoirs, rivers and other water bodies are seriously polluted, and the eutrophication of water bodies is intensifying. Taking the Taihu Lake Basin as an example, looking at the water environment quality of major cities, the water quality is not optimistic. Total nitrogen, ammonia nitrogen, total phosphorus, and COD are the primary pollutants, and nitrogen pollution is the most serious. River denitrification has become one of the key points of comprehensive improvement of urban water environment. The whole nitrogen cycle process in water mainly includes ammonification, nitrification, denitrification and nitrogen fixation, among which ammonification, nitrification and denitrification a...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that as the treatment progresses, the weight of the film-hanging material hanging under the floating bed is increasing day by day, mainly due to the weight of the carrier after it has been soaked in water for a long time and the weight caused by the absorption of suspended impurities in the water body and the interception of garbage. , resulting in too heavy load on the floating bed, and even sinking of the floating bed

In addition, for urban rivers with a small water area, large areas of suspended materials along the water depth direction affect hydraulic flow to a certain extent, resulting in local channel blockage and poor water flow.