In-situ biological enhancing and benthic environment biological repairing method for bottom mud

A bio-enhancement and ecological restoration technology, applied in chemical instruments and methods, biological sludge treatment, biological water/sewage treatment, etc., can solve the problem of insufficient tracking and evaluation of biological ecological environment, without considering the complexity of the black and odorous water body sediment environment , the speed of repair is slow, etc., to achieve the effect of improving water quality and sediment environment, improving microbial diversity, and improving adaptability

Inactive Publication Date: 2019-08-02
中机恒通环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not take into account the complexity of the sediment environment in black and odorous water bodies, and cannot guarantee the survival of microorganisms on the volcanic rock carrier, and thus cannot guarantee the restoration effect on the sediment, and the restoration speed of this method is relatively slow
[0006] To sum up, in-situ bioaugmentation treatment technology is commonly used in China to realize in-situ treatment of polluted sediment, but in the implementation process of existing technology, it is generally necessary to aerate the sediment in the early stage or disturb the high-pressure spray gun to realize or improve the treatment effect , which will inevitably cause secondary release of pollutants and secondary pollution of the water environment
Moreover, the tracking and evaluation of the biological ecological environment in the sediment environment after treatment is insufficient, resulting in repeated pollution.
After the biodegradation of the polluted sediment in the water environment, the subsequent impact on the benthic environment has not been tracked and evaluated

Method used

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  • In-situ biological enhancing and benthic environment biological repairing method for bottom mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of an immobilized microbial carrier filler: after mixing zeolite and bottom mud material at a mass ratio of 1: (2-10), place it in a room with a pH of 7-8 at 28-35°C under dark conditions. Soak and stir in the bacterial culture medium for 80-150 seconds, and continue the culture on a shaking table; every two days, replace the fresh bacterial culture medium and mix well, and after 10 days of culture, filter and complete; the number of bacteria obtained is at least 1.0×10 8 CFU / g. The particle size of the zeolite powder is 100-500 mesh, and the bottom mud material contains indigenous microbial flora, and the indigenous microbial flora consists of lactic acid bacteria, yeast flora, photosynthetic flora, bacillus flora, and nitrifying flora. The microbial abundances of lactic acid bacteria, yeast flora, photosynthetic flora, bacillus flora, and nitrifying flora in the native microbial flora are 12.52%, 8.36%, 11.25%, 9.28%, and 15.20%, respectively.

[0061] Th...

Embodiment 2

[0063] A biological solidification restoration agent for bottom mud, by weighing 300-400 parts of zeolite powder, 150-200 parts of calcium peroxide, 250-350 parts of fly ash, 20-50 parts of polyacrylamide, magnesium oxide 100-150 parts, 80-100 parts of iron oxide, put the above powder into a high-speed powder mixing device, stir at a speed of 500-1300rpm, mix and stir for 5-60 minutes, and mix evenly to get ready.

Embodiment 3

[0065] Select the polluted sediment of a river in a city as the implementation object, and conduct experiments on the isolated area of ​​the river with a length and width of 2m and 3m, that is, an area of ​​6㎡. The polluted sediment outside the isolated area is used as a comparative experiment. Perform the following steps on the experimental area:

[0066] 1. According to the preliminary judgment that the accumulation depth of pollutants is about 30cm, sprinkle the sediment biosolidification restoration agent into the contaminated test section, and the dosage is 300g / ㎡;

[0067] 2. Use a tillage boat to turn over and mix, the operating depth is 20-30cm, turn back and forth twice, measure the pH of the mud, the control range is 6.8-7.3, and the reaction time is 1-3 days. Observe the properties of the improved bottom mud , there is obvious mud-water separation;

[0068] 3. Then add the immobilized microbial carrier filler, the dosage is 200g / ㎡, use the mechanical plowing boat to ...

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Abstract

The invention provides an in-situ biological enhancing and benthic environment biological repairing method for bottom mud. The method comprises the following steps: 1) scattering a bottom mud biological curing repair agent into polluted bottom mud in a natural water domain and fully and uniformly stirring the mixture for 8-10 min to biologically modifying the bottom mud; 2) leaving the mixture tostand for 5-10 min after stirring, observing the character of the bottom mud which is modified, carrying out a next step if obvious mud-water separation is available, and otherwise, leaving the mixture to stand for 3-5 min continuously; 3) adding immobilized microbial carrier filler, and leaving the mixture to stand after full and uniform stirring. The method provided by the invention inhibits pollutant release of the bottom mud and degradation of the pollutants by means of the bottom mud biological curing repair agent and an immobilized microbial combination technique on a basis of not destroying the natural circulation of the water body, so that pollution of the overlying water body is reduced.

Description

technical field [0001] The invention relates to the technical field of water environment treatment and restoration, in particular to a method for in-situ biological enhancement of sediment and ecological restoration of benthic environment. Background technique [0002] With the rapid development of my country's urban economy, the scale of cities is expanding day by day, the urban environmental infrastructure is increasingly insufficient, the discharge of urban sewage is increasing, a large number of pollutants flow into the river, the concentration of nitrogen, phosphorus and other pollutants in the water body exceeds the standard, and the water body of the river is seriously polluted. Seasonal or year-round black and odorous water bodies. The ecosystem structure of urban black and odorous water bodies is seriously unbalanced, affecting the landscape, human production and health, and has become an extremely prominent urban water environment problem. [0003] The pollution of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F3/34
CPCC02F11/02C02F3/34
Inventor 刘许童白培峰施晓伟
Owner 中机恒通环境科技有限公司
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