Microbial composite carrier material for wastewater treatment and preparation method thereof

[0036] Preparation of a microbial composite carrier material for waste water treatment:

[0037] S1: Straw pretreatment, take the straw and add it to a round bottom flask filled with 0.5M NaOH solution (the solid-to-liquid ratio of straw to NaOH solution is 1g: 80mL), stir in an oil bath at 65°C for 1 hour, and then filter the product. After washing with ionic water to neutrality, dry at 50°C;

[0038] S2: Graft straw with [carboxymethyl-(2,4-dihydroxybenzyl)amino]acetic acid, weigh the pretreated straw, [carboxymethyl-(2,4-dihydroxybenzyl)amino]acetic acid and potassium dihydrogen phosphate (the mass ratio of pretreated straw, [carboxymethyl-(2,4-dihydroxybenzyl) amino] acetic acid, and potassium dihydrogen phosphate is 1:0.15:0.125) in 50% ethanol (the solid-to-liquid ratio of the pretreated straw and ethanol is 1g:40mL), and then placed in a 110°C oven for 3 hours, the product was washed with 50% ethanol several times and then dried at 50°C to obtain the product M;

[0039]...

[0041] The difference between the preparation of a microbial composite carrier material for waste water treatment and Example 1 is:

[0042] The mass ratio of the pretreated straw, [carboxymethyl-(2,4-dihydroxybenzyl)amino]acetic acid, and potassium dihydrogen phosphate in step S2 is 1:0.13:0.123; the reaction temperature is 105°C, The time is 3.5h;

[0043] In step S3, the mass ratio of product M to potassium persulfate is 1:0.23; the mass ratio of product M to N-methacryloylglycine is 1:13.6; during the heat preservation and constant temperature treatment process of liquid A, the constant temperature is 75°C, and the heat preservation time is For 1h; the reaction time is 4.5h.

[0045] The difference between the preparation of a microbial composite carrier material for waste water treatment and Example 1 is:

[0046] The mass ratio of the pretreated straw, [carboxymethyl-(2,4-dihydroxybenzyl)amino]acetic acid, and potassium dihydrogen phosphate in step S2 is 1:0.17:0.13; the reaction temperature is 115°C, The time is 2.8h;

[0047] In step S3, the mass ratio of product M to potassium persulfate is 1:0.32; the mass ratio of product M to N-methacryloylglycine is 1:14.6; during the heat preservation and constant temperature treatment process of liquid A, the constant temperature is 70°C, and the heat preservation time is For 0.8h; the reaction time is 5h.