River sediment in-situ remediation method

Abstract

The invention discloses an in-situ remediation method of sediment in rivers, which comprises the steps that: (1) aboriginal microorganism liquid, biological growth stimulation liquid and biological detoxification liquid are fully mixed according to a weight ratio of 8-10: 0.8-1.5: 0.8-1.2; (2) a spray hopper gun or an injection method is adopted to inject the mixed liquid obtained in step (1) to the bottom of the sediment in rivers and the concentration of the aboriginal microorganism liquid is 0.010 multiplied by 10<-6>- 0.015 multiplied by 10<-6>g / m<3>; (3) after 5-7 days, the biological growth stimulation liquid is injected into the sediment in rivers each day and the weight of the biological growth stimulation liquid is the same with the weight of the mixed liquid in step (1); then the biological growth stimulation liquid is injected in a halved amount each day for 25-30 days. The method of the invention has good treatment and remediation effect, simple operation and little influence on normal municipal administration and the life of residents. A river flow aerobic self-purification ecological system established can keep persistent good state; good conditions are created for the establishment of the river flow aerobic self-purification ecological system so as to completely eliminate malodorous black river.

Description

technical field [0001] The invention relates to a method for controlling pollution, in particular to an in-situ restoration method for river bottom mud. Background technique [0002] Black and smelly rivers are a common phenomenon in urban river networks in my country. Due to social and economic development, a large amount of industrial wastewater and domestic sewage without effective treatment are discharged into urban rivers and lakes, causing water environmental pollution. Black and odorous rivers and eutrophication of rivers and lakes are common phenomena in my country's urban water environment. According to the survey, among the 138 monitored river sections flowing through cities, only 23% meet the water quality standards of Class II and III, 19% meet the water quality standard of Class IV, 20% meet the water quality standard of Class V, and the water quality exceeds Class V. Standard accounts for 38%; 90% of water bodies flowing through urban rivers do not meet drinki...

AI Technical Summary

Problems solved by technology

[0008] 1. Expensive and slow to implement

Sewage interception and dredging usually require the mobilization and coordination of several departments, resulting in high project costs and slow progress

[0009] 2. The construction process is too cumbersome, which will affect the normal municipal management and residents' life

Since the treatment method is mainly physical dredging, there is no ecological restoration function, especially for urban or suburban rivers that cannot effectively intercept sewage, and the maintenance time after dredging is short