Biological stimulant for in-situ remediation of polluted water bodies and sediments and method of use thereof

A technology for in-situ remediation and polluted sediment, applied in the field of environmental remediation, can solve the problems of weak organic matter metabolism, low microbial activity, and reduced remediation capacity of polluted water bodies, and achieves the effect of promoting aerobic metabolism and improving aerobic metabolism. The effect of promoting aerobic respiration

Active Publication Date: 2020-08-18
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under anaerobic or anoxic conditions, microorganisms in polluted river water and sediments have the problems of low microbial activity and low organic metabolism, which greatly reduces the ability to repair polluted water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A semi-enclosed polluted river in Minhang District, Shanghai, with an area of ​​about 13,000 square meters, has been polluted by the surrounding domestic sewage for a long time. The average water depth is 1.5 meters (excluding the bottom mud layer). There are domestic garbage and branches and fallen leaves floating on the surface of the water body, and the water quality is turbid. For the polluted water body, first prepare a biostimulant according to the ratio of 50% calcium nitrate, 40% vitamin (vitamin B12), 5% coenzyme Q, and 5% NADH, dissolve it in distilled water, and stir it for 40 minutes at a speed of 500 rpm. Minutes, the mother liquor concentration is 40g / l. Spray the fully dissolved solution evenly in the water body to be treated with a high-pressure sprayer, and the final concentration of the biostimulant added is 10g / m 3 . The intermittent aeration method is used to aerate the polluted river water for 2 hours at intervals of 14 hours. During the aeration p...

Embodiment 2

[0036] A semi-enclosed polluted river in Minhang District, Shanghai, with an area of ​​about 13,000 square meters, has been polluted by surrounding domestic sewage for a long time. The average water depth is 1.5 meters. There are domestic garbage and branches and fallen leaves floating on the surface of the water body, and the water quality is turbid. For the bottom mud of the polluted river, first prepare a biological stimulant according to the ratio of 70% calcium nitrate, 20% vitamin (vitamin B1), 5% coenzyme Q, and 5% NADH, and dissolve it in distilled water at a speed of 1000 rpm. , stirred for 20 minutes, and the mother liquor concentration was 60g / l. The fully dissolved solution is evenly injected into the river sediment to be treated with a high-pressure water pump, the injection depth is 25cm, and the final concentration of the biostimulant is 50g / m 3 . The polluted river course is aerated by intermittent aeration, and the aeration is performed for 1.5 hours at inter...

Embodiment 3

[0038] A semi-enclosed polluted river in Minhang District, Shanghai, with an area of ​​about 13,000 square meters, has been polluted by the surrounding domestic sewage for a long time. The average water depth is 1.5 meters (excluding the bottom mud layer). There are domestic garbage and branches and fallen leaves floating on the surface of the water body, and the water quality is turbid. For the polluted water body, first prepare a biological stimulant according to the ratio of 55% calcium nitrate, 25% vitamin (vitamin B7), 10% coenzyme Q, and 10% NADH, dissolve it in distilled water, and stir it for 30 minutes at a speed of 800 rpm. Minutes, the mother liquor concentration is 50g / l. Spray the fully dissolved solution evenly in the water body to be treated with a high-pressure sprayer, and the final concentration of the biostimulant added is 5g / m 3 . Use the intermittent aeration method to aerate the polluted river water body, aerate for 1 hour every 10 hours, and control the...

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Abstract

The invention provides a biological activator for in situ repair of polluted water bodies and sediments and a use method thereof. The activator is prepared from, by mass, 50-70% of calcium nitrate, 20-40% of vitamin, 5-15% of coenzyme Q and 5-10% of reduced coenzyme I. The method comprises the steps of S1, preparing the biological activator according to a ratio, dissolving the biological activatorin water, and sufficiently dissolving to obtain mother liquid of the biological activator; S2, scattering the mother liquid in the water bodies to be treated and / or injecting to the polluted sediments of the water bodies to be treated; S3, intermittently aerating the polluted sediments of the water bodies to be treated and / or the water bodies to be treated which are already treated by step S2. The biological activator can promote the rapid growth of microorganisms in a poor environment, form a good microbial mass, and promote the ability of metabolizing organic substances, thereby improving the efficiency of microbial degradation of organic pollutants and improving water body and sediment treatment effect.

Description

technical field [0001] The invention relates to the technical field of environmental remediation, in particular to a biological stimulant for in-situ restoration of polluted water bodies and sediments and a method for using the same, mainly for the purification of polluted rivers, lakes, landscape water bodies and stabilization of sediments Preparation and application of biostimulants. Background technique [0002] Urban waterways play an important role in urban life and production, as well as in the regulation and improvement of the local environment and climate. However, with the development of society and economy, urban builders pay more attention to improving the flood control and drainage capacity of river channels, and carry out cutting and straightening of river channels and channelization projects, resulting in simplification of river sections and smooth and hardened riverbed surfaces. The continuous interference has caused serious damage to the structure and ecolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F11/02C02F101/30
CPCC02F3/302C02F11/02C02F2101/30C02F2103/007
Inventor 袁海平寿宗奇吴比马君妍俞璐
Owner SHANGHAI JIAOTONG UNIV
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