Method for in-situ remediation of riverbed sludge sediment

An in-situ modification and riverbed sediment technology, which is applied in the field of environmental management, can solve the problems of inability of microorganisms to survive, a large amount of clean sediment, difficulty in sources, etc., and achieve the effect of good fertilizer supply performance, good nutrient status, and many quick-acting nutrients.

Inactive Publication Date: 2017-07-28
南京必蓝环境技术有限公司
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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 periodic...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add EM bacteria fermentation broth (about 40 g / m 2 ), which is prepared by preparing water, brown sugar and EM strains (cyanobacteria and colloid bacillus) according to a weight ratio of 20:1:0.02-0.1, and is prepared through closed fermentation at 30-40°C for about 5 days.

[0033] Spray the soil improvement agent (55 parts of clay, 18 parts of plant cellulose, 15 parts of plant lignin, 12 parts of agricultural sludge) to the surface of the mud (amount of about 600 g / m 2 ), after the spraying is completed and left to stand for 40 minutes, stir for 1 minute. 30 minutes after stirring is complete. Sampling to detect the structure of sludge: pore volume 0.25-0.45ml / g, specific surface 200-300m 2 / g, pore size 6-10nm.

[0034] After the treatment, the sludge composition was detected, and the organic matter was about 2.5%, Cu about 31mg / kg, and Pd about 21mg / kg.

Embodiment 2

[0036] The raw material sludge and restoration steps are basically the same as those 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.

[0037] Sampling to detect the structure of sludge: pore volume 0.25-0.35ml / g, specific surface 200-250m 2 / g, pore size 5-8nm.

[0038] After the treatment, the sludge composition was detected, and the organic matter was about 2.9%, Cu about 35mg / kg, and Pd about 22mg / kg.

Embodiment 3

[0040] The raw material sludge and restoration steps are basically the same as those in Example 1, except that the soil improvement agents are replaced with: 55 parts of weathered coal, 18 parts of resin glue, 15 parts of plant lignin, and 12 parts of zeolite.

[0041] Sampling to detect the structure of sludge: pore volume 0.25-0.38ml / g, specific surface 200-260m 2 / g, pore size 5-9nm.

[0042] After the treatment, the sludge composition was detected, the organic matter was about 2.8%, the Cu was about 38mg / kg, and the Pd was about 28mg / kg.

[0043] Through the test data of Example 1, Example 2, and Example 3, it can be seen that the formulation of the soil improvement agent is: 55 parts of clay, 18 parts of plant cellulose, 15 parts of plant lignin, and 12 parts of agricultural sludge. .

[0044] 2. Research experiment of EM bacteria fermentation broth

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Abstract

The invention discloses a method for in-situ remediation of riverbed sludge sediment. The method solves the problem that at present, in many cities, river water is muddy and smelly, riverway treatment effects are poor and the treated qualified river water goes bad after a short period after treatment. The surface of the sludge sediment treated by the method has a compact cluster structure. The method can prevent harmful substances such as heavy metals in the sediment layer from entering water and polluting water. The method does not destroy the original ecological environment, does not cause secondary pollution, realizes thorough treatment and basically prevents recurrence.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to an in-situ modification method of riverbed bottom mud. Background technique [0002] At present, the phenomenon of black and odorous water bodies in many cities is relatively serious, and cannot be effectively treated. Even if the treatment reaches the standard in a short time, there will be recurrences. caused by harmful substances. Therefore, in order to completely restore the river water, the sediment at the bottom of the river bed must be effectively treated. [0003] Sediment, as one of the three environmental elements (water quality, aquatic organisms and sediment) of the aquatic ecosystem, undertakes the dual functions of receiving exogenous pollutants and releasing nutrients into the water body, and plays a vital role in the material cycle and energy of the aquatic ecosystem. important role in the flow process. The sediment is composed of a ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02
CPCC02F11/00C02F11/02
Inventor 刘永启叶根喜蒋斌蒋宇波周宏武胡海如李小荷
Owner 南京必蓝环境技术有限公司
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