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An ecological restoration method for water rich in high-pollution colloidal particles

A technology of colloidal particles and ecological restoration, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the high cost of ecological water replenishment for clean water sources, reduce the concentration of suspended solids in water bodies, and have no operability To achieve the effect of reducing the frequency and intensity of human interference, strong technical operability and low price

Active Publication Date: 2021-08-13
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Suspended particles in water, especially fine particles, silty clay and colloidal substances of organic particles, are easy to suspend in water due to their small particle size and light specific gravity, or settle slowly at the bottom of the water in a short period of time. The resuspension process is very easy to occur under the disturbance of living organisms, which accelerates the re-turbidity of the water body
For polluted water bodies, the current technologies mainly include flocculation, replenishment with fresh water, aeration and other measures. Although some technologies can improve water transparency to a certain extent in the short term, there are cost-effectiveness problems. For example, adding flocculants can quickly improve transparency in the short term , and after the turbidity drops in a short period of time, the frequent addition of flocculants will increase the secondary pollution of the water body; in addition, clean water replenishment may be an effective method in the case of clean water sources, but according to the 2016 Water Resources Survey Bulletin, my country's eutrophication The number of lakes accounts for 78.6%, and the surface water of rivers and rivers accounts for about 15% of Class V and inferior Class V water bodies. These water bodies all have a certain degree of pollution.
The cost of ecological replenishment of clean water sources is high, and many places do not have operability. Aeration can inhibit the growth of algae in the water body and reduce the concentration of suspended solids in the water body to a certain extent. However, the existing technology is not effective for long-term and low-cost continuous solution to water body pollution. To overcome this technical difficulty

Method used

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  • An ecological restoration method for water rich in high-pollution colloidal particles
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  • An ecological restoration method for water rich in high-pollution colloidal particles

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Effect test

Embodiment 1

[0056] According to the present invention, for the highly polluted water body formed by fine particle colloids in the water body, the technical solution provided by the present invention can be used for on-site spraying, which can reduce the concentration of water colloid particles and significantly improve the transparency of the water body in a short period of time, combined with the restoration of submerged plant turf , can keep the water long-lasting clarification.

[0057] The specific implementation plan is as follows:

[0058] 1) The water body in a park in Huzhou, Zhejiang Province is gray and dark yellow in dirty state. The fluidity of the water body is small, the transparency of the water body is 20~30cm, and the turbidity of the water body is 80~120NTU.

[0059] For this water body, a composite flocculant is prepared first. A mixed solution of starch, dimethyldiallyl ammonium chloride solution, and NaOH (wherein the mass fraction of starch is 50%, and the molar ra...

Embodiment 2

[0063] According to the present invention, for the highly polluted water body formed by the fine particle colloid of the river water body, the technical solution provided by the present invention is used for on-site spraying, which can reduce the concentration of the water colloid particle, significantly improve the transparency of the water body in a short period of time, combined with the submerged plant turf in the later stage Restoration can keep the water body clarified for a long time.

[0064] The specific implementation plan is as follows:

[0065] 1) After a heavy rain in a river in Huzhou, Zhejiang, the water color was dark yellow and turbid with a small amount of algae. The fluidity of the water body is small, the transparency of the water body is 30~40cm, and the turbidity of the water body is 65~75NTU.

[0066] For this water body, a composite flocculant is prepared first. A mixed solution of starch, dimethyldiallyl ammonium chloride solution, and NaOH (wherein ...

Embodiment 3

[0070] According to the present invention, for the highly polluted water body formed by the fine particle colloid of the pond water body, the technical solution provided by the present invention is used for on-site spraying, which can reduce the concentration of the water colloid particle, significantly improve the transparency of the water body in a short period of time, and combine the submerged plant turf in the later stage Restoration can keep the water body clarified for a long time.

[0071] The specific implementation plan is as follows:

[0072] 1) In a pond in Huzhou, Zhejiang, the water color is light gray and turbid with a small amount of algae. The fluidity of the water body is small, the water body transparency is 20cm, and the water body turbidity is 55~90NTU.

[0073] For this water body, a composite flocculant is prepared first. A mixed solution of starch, dimethyldiallyl ammonium chloride solution, and NaOH (wherein the mass fraction of starch is 60%, and th...

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Abstract

The invention discloses an ecological restoration method for a water body rich in high-pollution colloidal particles, which comprises: spreading and stirring a composite flocculant on the water surface; Covering: After covering with a thin layer, the submerged plant turf is used for whole block transplanting under water to restore the submerged plant community at the bottom of the water. The present invention is aimed at the water body after dredging, the water body after the flood with high content of sediment and colloidal substances, and the water body is rich in certain algae, has a good water quality improvement effect, and can be used in urban rivers, small reservoirs and ponds. Particles and algae need to improve the water quality of the water body, and can achieve the purpose of long-term restoration of the transparency of the polluted water body quickly and continuously for a long time.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a restoration method for improving the water quality of highly polluted water bodies, in particular to a method for rapidly improving the water quality of urban rivers or small urban lakes and reservoirs. Background technique [0002] Suspended particles in water, especially fine particles, silty clay and colloidal substances of organic particles, are easy to suspend in water due to their small particle size and light specific gravity, or settle slowly at the bottom of the water in a short period of time. The resuspension process is very easy to occur under the disturbance of living organisms, which accelerates the re-turbidity of the water body. For polluted water bodies, the current technologies mainly include flocculation, replenishment with fresh water, aeration and other measures. Although some technologies can improve water transparency to a certain extent in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/5263C02F1/5236C02F3/32C02F3/322C02F2103/007C02F2209/11C02F1/36C02F1/56C02F1/66C02F3/327
Inventor 古小治陈开宁马书占
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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