Catalyst for regeneration and reuse of printing and dyeing wastewater, preparation method and application thereof
A printing and dyeing wastewater and catalyst technology, which is applied in the direction of biochemical equipment and methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high processing cost, forced shutdown, and inability to recycle wastewater, and achieve obvious effects Effect
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Embodiment 1
[0040] Feeding according to the following weight percentages: 0.1% of nano-titanium oxide, 16% of alkaline protease, 40% of sodium silicate, 4% of sodium bicarbonate, 7% of sodium percarbonate, 9% of sodium carbonate, and 23.9% of water;
[0041] a) Dispersion of nano-titanium oxide:
[0042] Take nano-titanium oxide, use a high-shear disperser, add water and disperse for 10 minutes at 10,000 rpm; then move to a homogeneous stirring device, add alkaline protease and homogeneously stir at 20°C for 15 minutes minute; then slowly reduce the number of revolutions to 80 revs / min, add sodium bicarbonate and continue to stir evenly, and the resulting colloidal solution passes through a sieve for subsequent use;
[0043] b) Compounding of dust-free bodies:
[0044] Start the homogeneous mixer, slowly add sodium silicate and sodium percarbonate under the condition of 60 rpm and stir for 15 minutes, then slowly pour in the above colloidal solution, stir homogeneously and set aside;
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Embodiment 2
[0048] Feeding according to the following weight percentages: 1.5% of nano-titanium oxide, 17% of alkaline protease, 29% of sodium silicate, 3.5% of sodium bicarbonate, 10% of sodium percarbonate, 8% of sodium carbonate, and 31% of water.
[0049] a) Dispersion of nano-titanium oxide:
[0050] Take nano-titanium oxide, use a high-shear disperser, add water at 25,000 rpm and disperse for 5 minutes; then move to a homogeneous stirring device, add alkaline protease and homogeneously stir at 15°C for 20 minute; then slowly reduce the number of revolutions to 60 revs / min, add sodium bicarbonate and continue to stir evenly, and the resulting colloidal solution passes through a sieve for subsequent use;
[0051] b) Compounding of dust-free bodies:
[0052] Start the homogeneous mixer, slowly add sodium silicate and sodium percarbonate under the condition of 80 rpm and stir for 10 minutes, then slowly pour in the above colloidal solution, and set aside after homogeneous stirring;
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Embodiment 3
[0056] Feeding according to the following weight percentage: nano-titanium oxide 2.5%, alkaline protease 13%, laccase 2%, sodium silicate 42%, sodium bicarbonate 2.5%, sodium percarbonate 8%, sodium carbonate 6%, water 24% .
[0057] a) Dispersion of nano-titanium oxide:
[0058] Take nano-titanium oxide, use a high-shear disperser, add water at 20,000 rpm and disperse for 25 minutes; then move to a homogeneous stirring device, add alkaline protease and homogeneously stir at 40°C for 25 minutes minutes; then add laccase and rotate forward for 30 minutes under the condition of 300 rpm, then reverse for 25 minutes; then slowly reduce the number of revolutions to 50 rpm, add sodium bicarbonate and continue to stir evenly, the obtained colloidal solution pass through a sieve for use;
[0059] b) Compounding of dust-free bodies:
[0060] Start the homogeneous mixer, slowly add sodium silicate and sodium percarbonate under the condition of 90 rpm and stir for 30 minutes, then slo...
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