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In-situ modification and repair method of riverbed sediments in black-smelly river courses

A technology of in-situ modification and river bed sediment, applied in the field of environmental governance, can solve the problems of large engineering volume, failure of cultivation, slow effect, etc., and achieve the effect of short governance period, strong operability and obvious effect

Inactive Publication Date: 2019-03-15
南京恒嘉坤科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problem is that the project volume is large, a large amount of cleaning sediment is required, and the source is difficult
Its limitation is that the periodical growth of microorganisms leads to slow effect of the technology, and the complexity of the environment leads to the failure of microorganisms to survive and culture failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add EM bacteria fermentation broth (about 40 g / m2), which is configured by water, brown sugar, and EM strains (cyanobacteria and Bacillus glaciens) according to a weight ratio of 20:1:0.02~0.1, and after 30 ~40℃ closed fermentation for about 5 days.

[0032] Spray the soil improvement agent (55 parts of clay, 18 parts of plant cellulose, 15 parts of plant lignin, 12 parts of agricultural sludge) on the surface of silt (approximately 600 g / m2). After spraying, let it stand for 40 minutes and stir for 1 minute. After 30 minutes of stirring. Sampling to detect the structure of the sludge: pore volume 0.25~0.45ml / g, specific surface 200~300m2 / g, pore diameter 6~10nm.

[0033] After the treatment, the sludge composition was detected, and the organic matter was about 2.5%, Cu was about 31mg / kg, and Pd was about 21mg / kg.

Embodiment 2

[0035] The raw material silt and the restoration steps are basically the same as in Example 1, except that the soil improvement agent is replaced with: 55 parts of sepiolite, 18 parts of plant straw, 15 parts of plant lignin, and 12 parts of lime.

[0036] Sampling to detect the structure of the sludge: pore volume 0.25~0.35ml / g, specific surface 200~250m2 / g, pore diameter 5~8nm.

[0037] After the treatment, the sludge composition was detected. The organic matter was about 2.9%, Cu was about 35mg / kg, and Pd was about 22mg / kg.

Embodiment 3

[0039] The raw material sludge and the restoration steps are basically the same as those in Example 1, except that the soil improvement agent is replaced with: 55 parts of weathered coal, 18 parts of resin glue, 15 parts of plant lignin, and 12 parts of zeolite.

[0040] Sampling and testing the structure of the sludge: pore volume 0.25~0.38ml / g, specific surface 200~260m2 / g, pore diameter 5~9nm.

[0041] After the treatment, the sludge composition was detected, and the organic matter was about 2.8%, Cu was about 38mg / kg, and Pd was about 28mg / kg.

[0042] According to the test data of Example 1, Example 2, and Example 3, it can be seen that the formula of the soil improving agent is: 55 parts of clay, 18 parts of plant cellulose, 15 parts of plant lignin, and 12 parts of agricultural sludge. .

[0043] 2. EM fermentation broth research experiment

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PUM

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Abstract

The invention discloses an in-situ modification and repair method of riverbed sediments in black-smelly river courses and solves the problems that at present, the river courses in many cities are muddy and smelly, the river management effect is worse, and the recurrence phenomenon can also exist even if the management for a short period of time is qualified. The sediment surface repaired by the adopting the method disclosed by the invention is of a dense cluster structure and can prevent the situation that heavy metals and other harmful substances contained in a silt layer enter a water body to cause the pollution; an original ecological environment cannot be destroyed; the secondary pollution cannot be caused; the management is thorough, and no recurrence exists basically.

Description

Technical field [0001] The invention belongs to the technical field of environmental treatment, and specifically relates to an in-situ modification and repair method of black and smelly river bed sediment. Background technique [0002] At present, the phenomenon of black and smelly water bodies in many cities is serious and cannot be effectively controlled. Even if the treatment meets the standard for a short time, there will be recurrences. A considerable part of these recurrences is caused by the continuous emission of poisonous silt from the bottom of these river beds to the water body. Caused by harmful substances. Therefore, in order to repair the river water thoroughly, the bottom mud at the bottom of the river bed must be effectively treated. [0003] As one of the three major environmental elements (water quality, aquatic organisms and sediment) of the aquatic ecosystem, bottom mud is responsible for the dual functions of receiving exogenous pollutants and releasing nutrie...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F3/34C02F3/32C02F101/20
CPCC02F11/02C02F3/32C02F3/34C02F2101/20
Inventor 解云英赵双宝
Owner 南京恒嘉坤科技有限公司
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