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In-situ treatment system and method of black and odorous water

A technology for in-situ treatment of black and odorous water, applied in the field of water treatment, can solve the problems of high treatment cost, large floor space, and high energy consumption, and achieve the effects of improving treatment efficiency, reducing floor space, and increasing residence time.

Active Publication Date: 2018-02-09
中交生态环保投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although with the development of science and technology, the original technology has been improved in practical application, but many problems are still unresolved
The use of chemical treatment (coagulation treatment) only transfers pollutants without removal and removal, and has limited treatment effects on organic matter and nitrogen. Artificial dosing of chemical treatment agents will cause accumulation of adverse effects on the ecosystem and should not be advocated; Restoration has great advantages, such as cost saving, no or less energy consumption, but single addition of microbial treatment may have disadvantages such as unsatisfactory removal of nitrogen and phosphorus and insufficient dissolved oxygen; moreover, many water treatment processes still have Disadvantages of large area and high energy consumption
Although the advantages of various treatment methods have been combined and the in-situ combination process is adopted, the mobile emergency treatment system can achieve rapid treatment effects for small areas of black and odorous water bodies during in-situ treatment, but for large-scale river pollution, The treatment cost is too high, and the goal of complete cure cannot be achieved; simple addition of biological bacteria or artificial aquatic plants cannot solve the dissolved oxygen in water, and the loss of bacteria with water flow is serious, requiring a large amount of dosage

Method used

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  • In-situ treatment system and method of black and odorous water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The water quality of black and odorous water body in a certain river course, COD is 223mg / L; total phosphorus is 3.88mg / L; ammonia nitrogen is 13.75mg / L; dissolved oxygen is 0.31mg / L; transparency is 10cm; SS (suspended solids) is 183.4mg / L.

[0071] 1) Fenton oxidation experiment

[0072] Investigate the reaction time, hydrogen peroxide dosage and H 2 o 2 / Fe 2+ The effect of molar ratio on the treatment effect, the reaction temperature is room temperature 24.3 ℃, the pH value of influent water is 7.93, and the temperature and pH value are not adjusted during the reaction process.

[0073] The experimental results show that the reaction time is 30min, the dosage of hydrogen peroxide is 7mmo / L, the H 2 o 2 / Fe 2+ The treatment effect is the best when the molar ratio is 5:1. At this time, COD is 91mg / L; total phosphorus is 0.397mg / L; ammonia nitrogen is 11.86mg / L.

[0074] 2) Coagulation experiment

[0075] Polyferric sulfate was used as coagulant, and polyacrylam...

Embodiment 2

[0082] Pilot test:

[0083] The water quality of black and odorous water body in a certain river course, COD is 223mg / L; total phosphorus is 3.88mg / L; ammonia nitrogen is 13.75mg / L; dissolved oxygen is 0.31mg / L; transparency is 10cm; SS (suspended solids) is 183.4mg / L.

[0084] Embed the baffle reactor into the simulated river, the width of the baffle reactor and the simulated river is 1m, the depth is 0.5m, the baffle reactor is up and down, there are ten folds, and the length of the bend in the vertical direction is 1m , the length in the horizontal direction is 1m, and the length in the vertical direction of the baffle is 0.75m;

[0085] 1) According to figure 1 In the baffled reactor, a coarse grid and a fine grid are installed inside the baffle reactor. The gap between the coarse grid and the fine grid is 2 mm. The pretreatment area and the separation area respectively occupy a folding channel. The flow velocity of the simulated river is 0.2m / s, the water temperature is...

Embodiment 3

[0093] The water quality of the black and odorous water body in the river course, COD is 203-342mg / L; total phosphorus is 2.96-3.88mg / L; ammonia nitrogen is 11.91-13.75mg / L; dissolved oxygen is 0.31-0.55mg / L; transparency is 10-13cm; SS( Suspended matter) is 183.4-203.7mg / L.

[0094]In the upper reaches of the above-mentioned black and odorous water channel, the river channel is reconstructed in the gentle slope area down the riverbed in the direction of water flow, and the up and down deflection of the river water is realized by setting diversion walls. The black and odorous water in-situ treatment system includes a processing unit, the processing unit A total of 10 diversion walls are set up, with a total of nine bends, 5 upward flow diversion walls, and 5 downward flow diversion walls; the width of the channel is 5m, the average depth is 2.1m, and the bends are vertical The length in the direction is 3m, the length in the horizontal direction is 5m; the vertical length of t...

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Abstract

The invention provides an in-situ treatment system of black and odorous water and a method of using the system to treat black and odorous water. The in-situ treatment system of black and odorous watercomprises a pretreatment zone, an in-situ treatment zone and a separation zone; a certain section of a river channel is modified, more deflections are added to water flows, the water has longer stayin a unit zone, and the land around is scarcely used; in-situ restoration is mainly dependent on a biological method assisted by physicochemical methods, and the quality of the black and odorous wateris finally improved. In the method, the in-situ restoration of the black and odorous water is confined in a smaller area so that the concentration of microbes in the water of this area is increased,reflow can be achieved, contaminants in the water gain full time to degrade, treatment cost is lowered, and treatment is fast, efficient and free of secondary contamination.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an in-situ treatment system and method for black and odorous water. Background technique [0002] Black and odorous water body is a serious water pollution phenomenon, which makes the water body lose its self-purification function and affects the ecological environment and human health. Black and odorous water is caused by chemical, physical and biological actions of organic pollutants under anoxic or anaerobic conditions. According to the survey, the main sources of pollution that cause black and odorous water bodies are: organic pollutants, sediment resuspension, and thermal pollution of water bodies. [0003] At present, the treatment methods for black and odorous water bodies mainly include: pollution source control, water quality purification and ecological restoration in the water body, and hydrodynamic improvement; among them, the water quality purific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/44C02F1/488C02F1/5281C02F1/72C02F3/082C02F3/10C02F3/34C02F9/00C02F2001/007C02F2103/007C02F2203/006C02F2209/08C02F2209/10C02F2209/14C02F2301/046C02F2301/08C02F2303/14C02F2305/026
Inventor 张桐孙笑非王永吉王越博曹大伟薄修齐
Owner 中交生态环保投资有限公司
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