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A technology for in-situ restoration of river sediments, applied in the field of pollution control, can solve the problems of normal municipal management and residents' lives, slow progress, high cost, etc. Effect
Inactive Publication Date: 2008-07-23
广州市净水有限公司
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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 no
Method used
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Embodiment 1
[0028] Using the river bottom mud, with a variety of organic and inorganic nutrients as the substrate, the indigenous microbial liquid mainly composed of denitrifying bacteria is formed through anaerobic fermentation.
[0029] The indigenous microorganism liquid, the humic acid solution and the chelated iron are fully mixed in a weight ratio of 8:1.0:1.2.
[0030] The resulting mixed solution was pressed by the indigenous microbial liquid 0.010×10 through a high-pressure spray gun. -6 g / m 3 The concentration is directly injected into the bottom of the sediment.
[0031] Five days later, inject the humic acid solution into the bottom mud of the river in the same amount as the injected mixed solution every day, and then inject half the amount every day for 30 days.
[0032] After treatment, the bottom mud gradually floated up, and under the action of indigenous microorganisms, a white oxide layer appeared on the surface of the bottom mud. Remove the organic matter in the oxid...
Embodiment 2
[0034] Using the river bottom mud, with a variety of organic and inorganic nutrients as the substrate, the indigenous microbial liquid mainly composed of denitrifying bacteria is formed through aerobic fermentation.
[0035] The indigenous microorganism liquid, the humic acid solution and the chelated zinc are fully mixed in a weight ratio of 10:0.8:1.0.
[0036] The resulting mixed solution was pressed by the indigenous microbial liquid 0.015×10 through a high-pressure spray gun. -6 g / m 3 The concentration is directly injected into the bottom of the sediment.
[0037] After seven days, inject the humic acid solution into the bottom mud of the river in the same amount as the injected mixed solution every day, and then inject half the amount every day for 25 days.
[0038] After treatment, the bottom mud gradually floated up, and under the action of indigenous microorganisms, a white oxide layer appeared on the surface of the bottom mud. Remove the organic matter in the oxid...
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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...
Claims
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