Method for preparing heavy metal adsorbent by sludge bioleaching-pyrolysis combined treatment
A technology of sludge and biochar, which is applied in the field of resource utilization of solid waste, can solve problems such as biochar, achieve high adsorption capacity, and improve adsorption performance
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[0028] (1) Take fresh sludge from the sludge concentration tank of a sewage treatment plant in Guangxi, add 500mL of fresh sludge to a 1000mL serum bottle, and add 5g of FeSO 4 ·7H 2 O is the substrate, and the culture is shaken at 25°C and 180 r / min until the pH value of the sludge drops and stabilizes to 2.0 to obtain the sludge bacterial solution.
[0029] (2) Take 50mL of the sludge bacterial solution obtained in step (1) and add it to 500mL of fresh sludge, add 5g of FeSO 4 ·7H 2 O, at 25°C, 180r / min shaking culture, until the pH value is stable to 2.0, repeat the above steps 5 times, to inoculate the sludge bacterial liquid; with the increase of the number of inoculations, each time the bacterial liquid is cultivated until the stable growth period Time gradually shortened to 5 days.
[0030] (3) Take the fresh sludge from the sludge thickening tank of a certain sewage treatment plant in Guangxi, adjust the sludge solid content to 2.2%; put 300mL of the above fresh slu...
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