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Method for inhibiting offensive odor of riverway water body and bottom mud

A water and river technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve the problems of accelerating the oxidative decomposition of malodorous substances, troublesome operation, difficult to add, etc., and achieve inhibition of sulfate reduction. Responsiveness, small amount of use, and the effect of not easily draining

Inactive Publication Date: 2009-10-28
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbial method is to speed up the oxidative decomposition of malodorous substances by adding beneficial microbial preparations. However, it needs to be combined with oxygenation means, which is generally difficult to achieve in shallow water. In addition, the operation is more troublesome and the cost is relatively high.
The method of adding nitrate has a significant effect on inhibiting the reduction of sulfate and reducing the release of sulfur-containing gas. The disadvantage is that it is not easy to add to the river sediment, easy to lose, and easy to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The test was carried out in a small urban polluted river channel about 600 meters long and 8 meters wide. The water flow of the river is slow, and the water from the urban rainwater pipe and a small amount of domestic sewage are its main water sources. The water depth is about 0.2 meters, and the bottom mud thickness is about 0.2-0.3 meters. The lower half of the channel is affected by the tide of the Pearl River twice a day. During the whole test period, the temperature was 21-32°C, and the pollution holding conditions were basically the same. At the beginning of the test, 20 kg of ferric oxide and sodium humate composite preparation (proportioning 60% of ferric oxide and 40% of sodium humate) were added, and after being adjusted into a suspension with 200 kg of water, the whole river Sprinkle evenly in the section, and then add 20 kg of ferric oxide and sodium humate compound preparation every 30 days (use 200 kg of water to make a suspension and sprinkle evenly in ...

Embodiment 2

[0043] The experiment was carried out in an urban polluted river channel with a length of about 1000 meters and a width of 10 meters. The water flow of the river is slow, and the water from the urban rainwater pipe and a small amount of domestic sewage are its water sources. The water depth is about 0.3 meters, and the bottom mud thickness is about 0.2-0.4 meters. The whole river course is affected by the tide of the Pearl River twice a day. During the entire 60-day test period, the temperature was 21-30°C, and the pollution receiving conditions were basically the same. At the beginning of the test, 30 kg of ferric oxide and sodium humate composite preparation (proportioning 70% of ferric oxide and 30% of sodium humate) were added, and evenly poured into a suspension with 300 kg of water. Sprinkle, and add 30 kg of ferric oxide and sodium humate compound preparation every 30 days (use 300 kg of water to make a suspension and sprinkle evenly across the river). At the beginni...

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Abstract

The invention provides a method for suppressing the stench of river water and bottom mud. The method is characterized by adding ferric oxide and sodium humate composite preparations to the river water, and the amount of each addition is 10-10% per cubic meter of water. 30 grams, the weight percentage proportioning of described ferric oxide and sodium humate composite preparation is: ferric oxide 50-70%, sodium humate 30-50%. By using the method of the invention, the release of volatile odorous substances in the water and bottom mud can be obviously suppressed, and the degree of nuisance to the residents can be reduced.

Description

technical field [0001] The invention relates to a method for suppressing release of volatile malodorous substances in river course water. Background technique [0002] Due to the impact of domestic sewage and non-point source pollution, it is common for urban rivers to turn black and stink to disturb residents. Studies have shown that hydrogen sulfide and volatile sulfur-containing organic compounds are the main substances that cause river stench. The decomposition and sulfate reduction reaction of sulfur-containing organic compounds in water and sediments under anoxic conditions are the main production pathways of hydrogen sulfide and volatile sulfur-containing organic compounds (methyl mercaptan, methyl sulfide, dimethyl disulfide, etc.). The fundamental solution to the river stench problem is to improve the river water environment by intercepting sewage, dredging, and replenishing ecological water. In the case that it is difficult to implement engineering measures on a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F11/00
Inventor 陈繁忠桂红艳盛彦清付广义
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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