New method for combined remediation of compound contaminated soil
A compound pollution and joint restoration technology, applied in the field of compound polluted soil and joint restoration of compound polluted soil, can solve the problems of poor restoration effect of compound pollution polluted soil, unfavorable large-scale application, long restoration period, etc., so as to shorten the restoration time, The effect of low residual rate and simple repair method
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[0030] Example 1
[0031] Select 100g of composite contaminated soil contaminated by heavy metals and polycyclic aromatic hydrocarbons, and then add humic acid and activated sludge, where the added amount of humic acid is 0.5% of the dry weight of the composite contaminated soil, and the added amount of activated sludge is the dry weight of the soil Then adjust the pH to 6.5, and then dilute to 200mL, then put it in a shaker, control the culture temperature at a constant temperature of 35 ℃, shake culture for 48 hours after repair, that can realize the compound contaminated soil Repair, get the repaired soil.
[0032] The above-mentioned activated sludge is obtained by culturing the sludge in the aeration tank of the sewage treatment plant. The specific cultivation method is:
[0033] Add the sludge selected from the aeration tank of the sewage treatment plant to the culture solution, control the temperature at 35°C, and the shaker speed of 200r / min, perform shaking culture, and pre...
Example Embodiment
[0035] Example 2
[0036] Select 100g of composite contaminated soil contaminated by heavy metals and polycyclic aromatic hydrocarbons, and then add humic acid and activated sludge. The addition of humic acid is 1.0% of the dry weight of composite contaminated soil, and the addition of activated sludge is the dry weight of soil Then adjust the pH value to 7.5, and then dilute to 200mL, put it in a shaker, control the culture temperature at a constant temperature of 26℃, shake culture for 56 hours after repairing, it can realize the compound contaminated soil Repair, get the repaired soil.
[0037] The above-mentioned activated sludge is activated sludge after cultivation. The specific cultivation method of activated sludge is:
[0038] Add the sludge selected from the aeration tank of the sewage treatment plant to the culture solution, control the temperature at 30℃, and the shaker speed of 150r / min. Perform shaking culture, and press BOD regularly during the culture process 5 : Nit...
Example Embodiment
[0040] Example 3
[0041] Select 100g of composite contaminated soil contaminated by heavy metals and polycyclic aromatic hydrocarbons, and then add humic acid and activated sludge, where the addition of humic acid is 0.1% of the dry weight of the composite contaminated soil, and the addition of activated sludge is the dry weight of the soil Then adjust the pH value to 8.5, and then dilute to 200mL, put it in a shaker, control the culture temperature at a constant temperature of 20℃, shake culture and repair for 60 hours, which can realize the repair of the compound contaminated soil , Get the repaired soil.
[0042] The above-mentioned activated sludge is activated sludge after cultivation. The specific cultivation method of activated sludge is:
[0043] Add the sludge selected from the aeration tank of the sewage treatment plant to the culture solution, control the temperature at 40℃, and the shaker speed of 250r / min. Perform shaking culture, and press BOD regularly during the cul...
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