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
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[0047] Example 1:
[0048] A preparation method of an in-situ ecological restoration agent for sediment includes 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 the high-speed powder mixer at 650rpm and stir for 60 minutes. Mix evenly to obtain the in-situ solidified bioremediation agent precursor of the bottom mud;
[0050] 2) Mix 200 parts of the bottom mud material with the in-situ solidified bioremediation agent precursor prepared in the previous step, and place it in a bacterial culture medium with a pH of 7-8 at 30°C under dark conditions, soak and stir for 200S , Mix well; every two days, replace with fresh bacterial culture medium and mix well, after 7 days of cultivation, filter and complete;
[0051] The microbial abundances of photosynthetic bacteria, nitrifying bacteria, denitrifying bacteria, Bacillus subtilis, Pseudomonas...
Example Embodiment
[0052] Example 2:
[0053] A preparation method of an in-situ ecological restoration agent for sediment includes 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, rotate at 1000 rpm, and stir for 50 minutes. Evenly mixing, the in-situ solidified bioremediation agent precursor is obtained.
[0055] 2) Mix 300 parts of the bottom mud material with the precursor of the bioremediation agent for in-situ solidification of the bottom mud prepared in the previous step, and place it in a bacterial culture medium with a pH of 7-8 at 35°C under dark conditions, soak and stir for 150S , And mix well; every two days, replace with fresh bacterial culture medium and mix well. After 7 days of cultivation, filter and complete.
Example Embodiment
[0056] Example 3:
[0057] In order to verify the improvement effect of the remediation agent prepared in the above embodiments on the contaminated bottom sludge, experiments were carried out on the contaminated bottom sludge of a river channel where domestic sewage and industrial wastewater are often discharged on both sides of a place and has a foul smell.
[0058] Take 1Kg of mud sample and place each 0.5Kg in two large beakers, add an appropriate amount of deionized water, stir into a slurry, and then add the ecological restoration agent prepared in Examples 1 and 2 to one of the beakers 2.5g each, stir quickly to mix evenly, observe the effect of the mud sample after 2 minutes, and see Table 1 for sampling and detection index results after the test. The other beaker served as a control group.
[0059] Table 1
[0060]
[0061] The carbon, nitrogen, and phosphorus indicators in the bottom sludge before and after the above experiment were tested. The test results are shown in Tabl...
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