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A method for in-situ chemical treatment and restoration of heavily polluted black and odorous water sediment

A technology for black and odorous water and heavy pollution, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, special treatment targets, etc. Visible, easy-to-use effects

Active Publication Date: 2018-04-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The landscape effect of the water body can be quickly improved by adding chemical agents, but there are certain skills in the use of agents, otherwise it is easy to cause chemical residues, which will cause secondary pollution while improving the water environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add saturated sodium carbonate solution to the bottom mud of the black and odorous water body, and the amount of saturated sodium carbonate solution is 500ml / m according to the bottom area of ​​the bottom mud 2 . Inject evenly into the bottom mud by continuous spraying.

[0030] (2) First mix sodium silicate, sodium percarbonate and water into a sodium percarbonate preparation solution in a weight ratio of 1:2:100, and then mix manganese dioxide and sodium percarbonate preparation solution in a weight ratio of 0.5:80 , made of sodium percarbonate liquid.

[0031] Add sodium percarbonate liquid to the bottom mud of black and odorous water bodies. The amount of sodium percarbonate liquid used is calculated according to the thickness of the bottom mud layer. When >5cm, use 1600ml per square meter. Inject evenly into the bottom mud by continuous spraying.

[0032] (3) Add trichloroisocyanuric acid to black and odorous water, add 1 kilogram of trichloroisocyanuric ac...

Embodiment 2

[0035] (1) Add saturated sodium carbonate solution to the bottom mud of the black and odorous water body, the amount of saturated sodium carbonate solution is 650ml / m according to the bottom area of ​​the bottom mud 2 . Inject evenly into the bottom mud by continuous spraying.

[0036] (2) First mix sodium silicate, sodium percarbonate and water into a sodium percarbonate preparation solution in a weight ratio of 1.2:2.5:130, then mix manganese dioxide and sodium percarbonate preparation solution in a weight ratio of 0.7:90 , made of sodium percarbonate liquid.

[0037] Add sodium percarbonate liquid to the bottom mud of black and odorous water bodies. The amount of sodium percarbonate liquid used is calculated according to the thickness of the bottom mud layer. When >5cm, use 1300ml per square meter. Inject evenly into the bottom mud by continuous spraying.

[0038](3) Add trichloroisocyanuric acid to the black and odorous water body, add 2 kilograms of trichloroisocyanur...

Embodiment 3

[0041] (1) Add saturated sodium carbonate solution to the bottom mud of the black and odorous water body, the amount of saturated sodium carbonate solution is 800ml / m according to the bottom area of ​​the bottom mud 2 . Inject evenly into the bottom mud by continuous spraying.

[0042] (2) First mix sodium silicate, sodium percarbonate and water into a sodium percarbonate preparation solution in a weight ratio of 1.5:3:150, and then mix manganese dioxide and sodium percarbonate preparation solution in a weight ratio of 1.0:100 , made of sodium percarbonate liquid.

[0043] Add sodium percarbonate solution to the bottom mud of black and odorous water bodies. The amount of sodium percarbonate solution is calculated according to the thickness of the bottom mud layer. The specific dosage is: when the thickness of the bottom mud layer is ≤ 5cm, the dosage is 600ml per square meter; When >5cm, use 1000ml per square meter. Inject evenly into the bottom mud by continuous spraying. ...

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Abstract

A method for in-situ chemical treatment and remediation of heavily-polluted black and odorous water bottom mud comprises the following steps that firstly, a saturated sodium carbonate solution is added into the black and odorous water bottom mud; secondly, a sodium percarbonate working solution is added into the black and odorous water bottom mud; thirdly, symclosene is added into black and odorous water; fourthly, non-ionic polyacrylamide is added into the black and odorous water so that the ecological transparence of the black and odorous water can be larger than 40 cm. According to the method, the environment-friendly chemicals of sodium carbonate, sodium silicate, manganese dioxide, sodium percarbonate, sodium symclosene and polyacrylamide are adopted, singles and compounds are used in combination, biological degradation and abiotic degradation are combined, a heavily-polluted water area is subjected to comprehensive ecological remediation, black and odorous bottom mud organic matter of the polluted water is subjected to in-situ remediation by increasing dissolution oxygen, the chemical regents can take effect fast after being added into the water, the black and odorous phenomenon in the water can be relieved in a short time, the adding mode is simple, the environment-friendly chemicals are used, secondary pollution to the water is avoided, and toxicity is very low.

Description

technical field [0001] The invention relates to a chemical restoration method for treating heavily polluted black and odorous water bottom sludge, and belongs to the technical field of urban black and odorous water treatment. Background technique [0002] Urban black and odorous water not only brings extremely poor sensory experience to the masses, but also a prominent water environment problem that directly affects the production and life of the masses. In areas with dense population, high pollution load intensity, and imperfect infrastructure, the dissolved oxygen concentration in the water body rapidly decreases to anaerobic conditions due to excessive pollutants being directly discharged into the river, exceeding its water environment capacity. During the process of anaerobic decomposition of organic matter in water bodies and sediments, black deposits such as ferrous sulfide will be produced, and malodorous gases such as hydrogen sulfide and ammonia will be produced at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/50C02F1/56C02F3/30C02F9/00C02F2303/04
Inventor 梁爽张建孙丰凯柳翠
Owner SHANDONG UNIV
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