Method for in-situ remediation of sediment in black and odorous water body

A technology for in-situ restoration of black and odorous water bodies, applied in chemical instruments and methods, water/sludge/sewage treatment, water aeration, etc. Long construction time and other issues, to achieve the effect of increasing water transparency, restoring water ecological environment, and short construction time

Inactive Publication Date: 2020-05-01
中国市政工程西北设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing in-situ restoration technology has defects such as complicated steps, long construction time, and unsatisfactory ecological restoration effect. In the treatment of black and odorous water bodies, the existing in-situ treatment technology has unsatisfactory treatment effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1; select the sediment sampling 0.4 m of a certain black and smelly river course 3 , water sample 0.6 m 3 , placed in a rectangular plexiglass tank for indoor testing, the plexiglass tank is 1 m 3 cube. The bottom mud sampled is black in color and has obvious peculiar smell. Follow the steps below to proceed:

[0020] 1. Weigh 20g of zeolite powder, 50g of calcium peroxide, 50g of high-efficiency polyaluminum chloride, 3g of natural mineral composite material, 15g of modified diatomite, and 30g of modified attapulgite; Evenly put in zeolite powder, calcium peroxide, high-efficiency polyaluminum chloride, natural mineral composite materials, modified diatomite and modified attapulgite in sequence, wherein high-efficiency polyaluminum chloride is formulated into an aqueous solution with a mass percentage of 15%, and Evenly sprinkled into the bottom mud by continuous spraying, the six materials were added in 80 minutes; during the adding process, stirring wa...

Embodiment 2

[0024] Embodiment 2; select the sediment sampling 0.5 m of a certain black and smelly river course 3 , water sample 0.5 m 3 , placed in a rectangular plexiglass tank for indoor testing, the plexiglass tank is 1 m 3 cube. The bottom mud sampled is black in color and has a particularly obvious peculiar smell. Follow the steps below to proceed:

[0025]1. Weigh 40g of zeolite powder, 75g of calcium peroxide, 100g of high-efficiency polyaluminum chloride, 6g of natural mineral composite material, 50g of modified diatomite, and 80g of modified attapulgite; Evenly put in zeolite powder, calcium peroxide, high-efficiency polyaluminum chloride, natural mineral composite materials, modified diatomite and modified attapulgite in sequence, wherein high-efficiency polyaluminum chloride is prepared as an aqueous solution with a mass percentage of 25%, and Evenly sprinkled into the bottom mud by continuous spraying, the six kinds of materials were added in 110 minutes; during the adding...

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Abstract

The invention relates to the technical field of treatment of sediment in rivers and lakes, and provides a method for in-situ remediation of sediment in a black and odorous water body. The method comprises the following concrete steps: sequentially adding zeolite powder, calcium peroxide, highly-efficient polyaluminium chloride, a natural mineral composite material, modified diatomite and modifiedattapulgite into the sediment, carrying out stirring while adding, and completing addition within 1-2 hours; continuing stirring for 20-40 minutes after completion of material addition; adding an activated denitrifying bacteria agent, a photosynthetic bacteria agent and a bacillus subtilis agent into the sediment, and carrying out bottom aeration for 1-4 hours; and after 3-7 days, planting submerged plants. The method provided by the invention is simple and practicable, short in construction time and good in ecological effect, removes sediment pollutants in situ, recovers the water area environment of an overlying water body at the same time, eliminates the black and odorous water body in a short period of time, improves the transparency of a water body, solidifies and eliminates pollutants in the sediment, reduces the contents of COD, ammonia nitrogen and total phosphorus in the overlying water body, and recovers the water ecological environment in a short period of time.

Description

technical field [0001] The invention relates to the technical field of river and lake sediment treatment, in particular to a method for in-situ restoration of black and odorous water sediment. Background technique [0002] After the rivers and lakes are polluted, a small part of the pollutants can be digested through the self-purification of the water body, and most of them will settle to form the bottom sediments to form the bottom sediment of the river and lake. [0003] Polluted sediment control technologies mainly include ex-situ treatment technology and in-situ treatment technology. The ex-situ treatment technology mainly includes sediment dredging technology, which has the advantages of quick results, mature technology, professional dredging equipment and dredging process, but the cost of sediment dredging technology is relatively high, and the depth of dredged sediment is required to be accurate, such as dredging Improper treatment will not only fail to effectively c...

Claims

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Application Information

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IPC IPC(8): C02F9/00C02F11/00C02F11/143C02F11/02C02F11/04C02F101/10C02F101/16C02F101/20C02F101/30
CPCC02F1/281C02F1/5245C02F3/32C02F3/34C02F7/00C02F9/00C02F11/00C02F11/008C02F11/02C02F11/04C02F2101/105C02F2101/16C02F2101/20C02F2101/30C02F2103/007C02F2305/06C02F11/143
Inventor 雷克刚杨婧
Owner 中国市政工程西北设计研究院有限公司
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