Method for preparing nitrogen-phosphorus co-doped carbon catalyst by utilizing residual sludge of membrane bioreactor
A membrane bioreactor, excess sludge technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of secondary pollution, difficult to be widely used, etc. Enhanced adsorption performance, broad practical application prospects, and the effect of short catalytic time
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Embodiment 1
[0044] A method for preparing a nitrogen-phosphorus co-doped carbon catalyst using excess sludge from a membrane bioreactor according to an embodiment of the present invention, the specific steps include:
[0045] Step 1, wash the remaining sludge with deionized water for 3 times, and dry it in a vacuum box furnace at 80°C for 36 hours;
[0046] Step 2, grinding and pulverizing the dried sludge, and then sieving with a 150-mesh screen to obtain dry sludge powder;
[0047] Step 3, prepare K 2 CO 3 Aqueous solution, the dry sludge powder obtained in step 2 is added to K 2 CO 3 A suspension is formed in an aqueous solution, which is used to prepare K 2 CO 3 K in aqueous solution 2 CO 3 The mass ratio of the mass to the added dry sludge powder is 2:1, the suspension is vigorously stirred with a stirrer for 0.5h, and then placed in a vacuum box furnace for 36h at 80°C;
[0048] Step 4, grinding and pulverizing the dry mixture obtained after the treatment in step 3, and then...
Embodiment 2
[0051] A method for preparing a nitrogen-phosphorus co-doped carbon catalyst using excess sludge from a membrane bioreactor according to an embodiment of the present invention comprises the following steps:
[0052] The first step is to take 20g of the remaining sludge from the membrane bioreactor, wash it with deionized water for 3 times, put it into a drying dish, and dry it in a vacuum box furnace at 80°C for 36h;
[0053] In the second step, the dried sludge is ground and pulverized, and then sieved with a 150-mesh sieve to obtain dry sludge powder;
[0054] The third step, 2gK 2 CO 3 Dissolve in 10ml of deionized water until completely dissolved, then take 1g of the dried sludge powder obtained in the second step and add it to K 2 CO 3 A suspension was formed in the aqueous solution, and the suspension was vigorously stirred with a stirrer for 0.5h, and then placed in a vacuum box furnace at 80°C for 36h;
[0055] In the fourth step, the dry mixture obtained after the...
Embodiment 3
[0059] A method for preparing a nitrogen-phosphorus co-doped carbon catalyst using excess sludge from a membrane bioreactor according to an embodiment of the present invention comprises the following steps:
[0060] The first step is to take 20g of the remaining sludge from the membrane bioreactor, wash it with deionized water for 3 times, put it into a drying dish, and dry it in a vacuum box furnace at 80°C for 36h;
[0061] In the second step, the dried sludge is ground and pulverized, and then sieved with a 150-mesh sieve to obtain dry sludge powder;
[0062] The third step, 2gK 2 CO 3 Dissolve in 10ml of deionized water until completely dissolved, then take 1g of the dried sludge powder obtained in the second step and add it to K 2 CO 3 A suspension was formed in the aqueous solution, and the suspension was vigorously stirred with a stirrer for 0.5h, and then placed in a vacuum box furnace at 80°C for 36h;
[0063] In the fourth step, the dry mixture obtained after the...
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