In-situ biochemical repairing agent for bottom mud of black and odorous water body, preparation method and repairing method
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A technology for black and odorous water body and repair agent, which is applied in chemical instruments and methods, water treatment parameter control, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of improving the dissolved oxygen level and microbial activity of the sediment, reducing the pollution of the sediment, and reducing the price.
Inactive Publication Date: 2018-02-02
HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST +1
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The ex-situ restoration method of sediment is limited due to the large amount of engineering, high cost, and difficult treatme...
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Embodiment 1
[0020] Use a grab sampler to collect polluted sediment from a black and odorous river in Changsha City, prepare two plexiglass reactors of 20×20×40 cm, spread 10 cm thick contaminated sediment in the reactors, and inject 20 cm High river course with black and smelly water. One is the blank group and the other is the experimental group. In the experimental group, 200g of sediment in-situ biochemical restoration agent was spread according to the addition amount of 5kg of restoration agent / square meter of sediment, and the blank group was not spread.
[0021] Preparation of sediment in-situ biochemical restoration agent:
[0029] Use a grab sampler to collect polluted sediment from a black and odorous pond in Changsha City, prepare two cylindrical plexiglass reactors with a diameter of 20 cm and a height of 40 cm, and spread 8 cm thick contaminated sediment in the reactors , and inject 24cm high pond black and smelly water. One is the blank group and the other is the experimental group. In the experimental group, about 120g of in-situ biochemical restoration agent was spread according to the addition amount of 4kg restoration agent / square meter of sediment, and the blank group was not added.
[0030] Preparation of sediment in-situ biochemical restoration agent:
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Abstract
The invention relates to an in-situ biochemical repairing agent for bottom mud of a black and odorous water body. The in-situ biochemical repairing agent is prepared from the following raw-material constituents in parts by weight: 30 to 40 parts of modified biological charcoal powder, 20 to 60 parts of aggregate, 15 to 20 parts of microbial bacterial agent and 10 to 15 parts of co-substrate. The biochemical repairing agent provided by the invention is combined with physical absorption, chemical treatment and biological treatment; all components have mutual synergistic effects; the effect of reducing the pollution by the bottom mud is obvious, wherein modified biological charcoal can be used for effectively adsorbing a heavy metal and part of organic matters, which are released by the bottom mud; diatomite and montmorillonite, which serve as the aggregate, on one hand, can be used for effectively adsorbing part of pollutants, and on the other hand, can be used for providing an attachment carrier for the growth of a microbe together with the modified biological charcoal at the same time; the co-substrate can be used for promoting the growth of the microbe and activating the activityof the microbial bacterial agent; the repairing agent for the bottom mud is spherical, is difficult to flow away along with water, and can sufficiently exert an effect, and in addition, the in-situ biochemical repairing agent for bottom mud, which is provided by the invention, is wide in material source and low in cost and has practical popularization and application conditions.
Description
technical field [0001] The invention relates to an in-situ biochemical restoration agent for black and odorous water body bottom mud, a preparation method and a use method thereof, and belongs to the technical field of water environment restoration. Background technique [0002] In the process of accelerating urbanization and industrialization in my country, due to the lagging of water pollution control and treatment measures, a large amount of industrial, agricultural and domestic wastewater is discharged into urban water bodies, and a large area of water bodies is polluted. There is a black and smelly phenomenon. The pollutants in the sediment will be continuously released to the overlying water and become the endogenous pollution of the water body. Especially when the external environment changes, the release of pollutants in the sediment to the overlying water will cause serious secondary pollution and deteriorate the water quality. Therefore, in today's increasingly ...
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