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In-situ treatment and repair method for polluted bottom mud

A technology of polluted sediment and in-situ treatment, applied in sludge treatment, biological sludge treatment, fixed/solidified sludge treatment, etc. Excellent effect, controllable release rate, and low engineering investment cost

Active Publication Date: 2019-11-29
清上(苏州)环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of nitrate will lead to an increase in the total nitrogen index of the water body
More importantly, nitrate has a high solubility and will be quickly exchanged into the water body through concentration gradients, hydrodynamic forces, etc., affecting its efficiency in sediment remediation

Method used

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  • In-situ treatment and repair method for polluted bottom mud
  • In-situ treatment and repair method for polluted bottom mud
  • In-situ treatment and repair method for polluted bottom mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1. Preparation of restoration agent

[0060] (1) preparation molar concentration is the silicate solution of 4mol / L (silicate is sodium silicate, and solvent is water);

[0061] (2) Stir with a magnetic stirrer, control the magnetron speed at 400rpm, slowly add an acid solution (the acid solution is hydrochloric acid, the concentration is 1mol / L) to the silicate solution, and monitor the pH value of the system;

[0062] (3) When the pH value is 4, use a magnetic stirrer to stir, control the magnetic sub-rotating speed at 400rpm, and add oxygen-containing anion salt particles (the oxygen-containing anion salt particles are calcium nitrate) into the system; wherein, oxygen-containing The molar ratio of anion salt to silicate is 5:1;

[0063] (4) Stir with a magnetic stirrer, control the rotation speed of the magnet at 100rpm and continue to add the acid solution (the acid solution is hydrochloric acid, the concentration is 1mol / L) until the pH is 2.5, and react for 80min...

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Abstract

The invention provides an in-situ treatment and repair method for polluted bottom mud, and the method comprises the following steps: (1) contacting or mixing a repair agent with the polluted bottom mud; (2) standing for reaction for 2-5 days; (3) contacting or mixing an immobilized composite microbial material with the polluted bottom mud; (4) standing for reaction for 5-20 days; and (5) during the process of the steps (1) and (3), oxygenating the polluted bottom mud for 2-3 times, wherein each time of oxygenating takes 15-30 minutes, and the 2-3 times of oxygenating are performed at time intervals of 30-60 minutes. Compared with dredging and other engineering methods, the in-situ remediation method for treating the polluted river bottom mud has the advantages of low engineering investmentcost, no influence on the surrounding environment in the process of engineering implementation, and gradual improvement of river microbial and microecological structures, and has excellent effect andlow cost by comprehensive utilization of physical, physical chemical, microbial and other means for treatment.

Description

technical field [0001] The invention belongs to the technical field of water environment treatment, and in particular relates to a method for in-situ treatment and repair of polluted bottom mud. Background technique [0002] In the past 30 years, the rapid economic and social development of our country has caused serious pollution of water bodies such as rivers and lakes in many cities or regions. Many rivers show the characteristics of black odor or even moderate black odor, and many lakes and urban inland rivers show eutrophication. It will seriously affect the health of the water ecosystem and the improvement of the quality of the water environment, and reduce the quality of life of the surrounding residents and the improvement of the demand for a beautiful environment. Harnessing the river water environment is an important task for my country's current water environment governance and comprehensive improvement of water quality. [0003] The silt that stays at the bottom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/06C02F101/30
CPCC02F11/02C02F11/148C02F11/008C02F2101/16C02F2209/04Y02W10/10
Inventor 郭鹏王晶晶
Owner 清上(苏州)环境科技有限公司
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