Special composite mimic enzyme for advanced treatment of pulping and paper-making waste water, and preparation method and application thereof
A wastewater treatment, pulping and papermaking technology, which is applied in the direction of processing wastewater treatment, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of difficult synthesis of ligands, low catalytic efficiency, poor specificity, etc.
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Embodiment 1
[0019] Dissolve ferrous sulfate heptahydrate in distilled water, the mass concentration of ferrous sulfate heptahydrate is 20%, then control the temperature of the solution at 25°C, slowly add tetrasodium edetate to the solution under stirring conditions, and add The molar ratio of added tetrasodium edetate to ferrous sulfate heptahydrate is 1:15. After the addition is completed, stir and react for 30 minutes, and the mixed solution is a special compound imitation enzyme.
[0020] Application example: A pulp and paper company in Shandong that uses poplar as raw material, pulps chemically, and produces cultural paper from the secondary sedimentation tank, COD Cr It is 368mg / L, the color is 400 times, and the pH is 7.8. Adopt the special-purpose compound imitation enzyme depth treatment of this pulping and papermaking wastewater of embodiment 1, add 1.08mmol / L compound imitation enzyme (molar number is Fe in the waste water) 2+ Ion meter) and other conventional agents (other co...
Embodiment 2
[0022] Dissolve ferrous sulfate heptahydrate in distilled water, the mass concentration of ferrous sulfate heptahydrate is 15%, then control the temperature of the solution at 23°C, slowly add tetrasodium edetate to the solution under stirring conditions, and add The molar ratio of added tetrasodium edetate to ferrous sulfate heptahydrate is 1:20. After the addition is completed, stir and react for 30 minutes, and the mixed solution is a special compound imitation enzyme.
[0023] Application example: A pulp and paper company in Shandong that uses waste paper as raw material to produce newsprint, the water output from the secondary sedimentation tank, COD Cr It is 146mg / L, the color is 200 times, and the pH is 7.3. Adopt the special-purpose compound imitation enzyme advanced treatment of this pulping and papermaking wastewater of embodiment 2, add 1.18mmol / L compound imitation enzyme (molar number is Fe 2+ ion meter) and other agents (concentrated sulfuric acid 180mg / L, hydro...
Embodiment 3
[0025] Dissolve ferrous sulfate heptahydrate in distilled water, the mass concentration of ferrous sulfate heptahydrate is 20%, then control the temperature of the solution at 25°C, slowly add tetrasodium edetate to the solution under stirring conditions, and add The molar ratio of added tetrasodium edetate to ferrous sulfate heptahydrate is 1:20. After the addition is completed, stir and react for 30 minutes, and the mixed solution is a special compound imitation enzyme.
[0026] Application example: A pulping and papermaking enterprise in Shandong uses wheat straw as raw material, pulps semi-chemically, and produces container board paper. Cr It is 455mg / L, the color is 500 times, and the pH is 7.7. Adopt the special compound imitation enzyme depth treatment of this pulping and papermaking waste water of embodiment 3, add 1.30mmol / L compound imitation enzyme (molar number is Fe 2+ Ion meter) and other chemicals (concentrated sulfuric acid 120mg / L, hydrogen peroxide 200mg / L, ...
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