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River-bottom in-situ remediation agent and preparation method thereof

A technology of in-situ remediation agent and bioremediation agent, applied in chemical instruments and methods, biological sludge treatment, fixed/solidified sludge treatment, etc., can solve problems such as sediment solidification, achieve fast solidification speed and improve decomposition ability , the effect of strong environmental adaptability

Active Publication Date: 2019-08-09
ZHANG ZHOU HALTH VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides an in-situ restoration agent for the river bottom and its preparation method, which realizes the in-situ fixation of the sediment by mixing the polluted sediment with the present invention without destroying the natural circulation of the water body. , It provides a good stable environment for the bottom mud restoration agent, and also creates favorable conditions for the recovery of the river ecosystem, thereby fundamentally eliminating water pollution, to solve the problem of not being able to solidify the inside of the bottom mud in the prior art, and internal pollution The technical problem of solid lock without precipitation

Method used

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  • River-bottom in-situ remediation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing an in-situ ecological restoration agent for bottom mud comprises the following steps:

[0049] 1) Weigh 350 parts of ceramsite, 250 parts of fly ash, 20 parts of polyacrylamide, 100 parts of magnesium oxide, and 80 parts of iron filings; put the above powder into a high-speed powder mixer at a speed of 650 rpm, and stir for 60 minutes. Mix evenly to obtain the precursor of the sediment in-situ solidification bioremediation agent;

[0050] 2) Mix 200 parts of the bottom mud material with the precursor of the bottom mud in-situ solidification bioremediation agent prepared in the previous step, and then soak and stir for 200 seconds at 30°C in a bacterial culture medium with a pH of 7-8 , and mix well; every two days, replace the fresh bacterial culture medium and mix well, after cultivating for 7 days, filter and complete;

[0051] The microbial abundances of photosynthetic bacteria, nitrifying bacteria, denitrifying bacteria, Bacillus subtilis, Ps...

Embodiment 2

[0053] A method for preparing an in-situ ecological restoration agent for bottom mud comprises the following steps:

[0054] 1) Weigh 300 parts of ceramsite, 300 parts of fly ash, 30 parts of polyacrylamide, 120 parts of magnesium oxide, and 100 parts of iron filings; put the above powder into a high-speed powder mixer at a speed of 1000 rpm, and stir for 50 minutes. Mix evenly to obtain the precursor of the sediment in-situ solidified bioremediation agent.

[0055] 2) Mix 300 parts of the bottom mud material with the precursor of the bottom mud in-situ solidification bioremediation agent prepared in the previous step, and then soak and stir in a bacterial culture medium with a pH of 7 to 8 at 35°C for 150 seconds. , and mix well; every two days, replace the fresh bacterial culture medium and mix well, after cultivating for 7 days, filter and complete.

Embodiment 3

[0057] In order to verify the improvement effect of the remediation agent prepared in the above examples on the polluted bottom mud, an experiment was carried out on the polluted bottom mud of a river course that often has domestic sewage and industrial wastewater discharged into both sides of a certain place and has a foul smell.

[0058] Get mud sample 1Kg, each get 0.5Kg and place in two large beakers respectively, add appropriate amount of deionized water, stir into slurry, then to one of the beakers, add the ecological restoration agent prepared in Examples 1 and 2 2.5g each, stir quickly to mix evenly, observe the effect of the mud sample after 2 minutes, and the results of sampling and detection indicators after the test are shown in Table 1. Another beaker served as a control group.

[0059] Table 1

[0060]

[0061] The carbon, nitrogen and phosphorus indicators in the sediment before and after the above experiment were detected, and the results of the detection i...

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Abstract

The invention provides a river-bottom in-situ remediation agent and a preparation method thereof. The river-bottom in-situ remediation agent is prepared by culturing a river-bottom in-situ remediationagent precursor and a bottom mud material in a bacterium culture medium after mixing, wherein the bottom mud material is sludge on the surface layer of the bottom of a to-be-remedied polluted water body, and the river-bottom in-situ remediation agent precursor is prepared by mixing ceramsite, fly ash, polyacrylamide, magnesium oxide and scrap iron. On the basis that the natural circulation of thewater body is not destroyed, polluted bottom mud is mixed with the remediation agent, in-situ fixation of the bottom mud is achieved, a good stable environment is provided for the bottom mud remediation agent, favorable conditions are created for establishment of a river ecosystem, water body pollution is eliminated fundamentally, and thus the technical problems are solved that the inside of bottom mud cannot be solidified and internal pollutant locking-in without precipitation cannot be achieved in the prior art.

Description

technical field [0001] The invention relates to the technical field of water environment treatment and restoration, in particular to a river bottom in-situ restoration agent and a preparation method thereof. Background technique [0002] Our country has a vast territory and many rivers, resulting in many river courses. River courses are the routes through which rivers flow, usually referring to navigable waterways. However, with the acceleration of urbanization, the amount of sewage discharge has increased significantly, and a large amount of sewage and domestic waste are directly discharged into the river. Coupled with rainfall, the runoff, sediment and sewage produced on the surface re-enter the river circulation system, resulting in river pollution. The situation is serious, damaging river biological resources, damaging river water and river environmental quality, and endangering human health. [0003] People try every means to control the pollution of river channels. Th...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02C02F101/30C02F101/16C02F101/10
CPCC02F11/008C02F11/02C02F2101/30C02F2101/16C02F2101/105C02F2303/02
Inventor 陈桐君黄仲庆曹林枝林燕燕
Owner ZHANG ZHOU HALTH VOCATIONAL COLLEGE
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