A method for deep removal of organic phosphorus in wastewater
A technology for organic phosphorus and wastewater, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problems of large dosage of chemicals, harsh reaction conditions, poor removal of organic phosphorus substances, etc. Achieve the effect of improving removal rate, low operating cost and mild reaction conditions
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Embodiment 1
[0028] Take the boiler circulating sewage containing organic phosphorus, the initial total phosphorus is 5.0mg / L, based on the volume of the sewage, add 100g / L of porous molecular sieve catalyst loaded with copper oxide and a particle size of 0.5mm, and adjust the sewage with dilute sulfuric acid The pH value of the solution is 8, feed 100mg / L of ozone gas, add 20mg / L concentration of 28% hydrogen peroxide, and react at room temperature for 0.5 hours.
[0029] After the reaction, the organic phosphorus content in the detected waste water is lower than 0.1mg / L, and the removal rate is greater than 97%. After the oxidation treatment, the total concentration of 200mg / L polyaluminum and PAM mixture was added to the wastewater. After precipitation and filtration, the total phosphorus in the wastewater was reduced to 0.23mg / L.
Embodiment 2
[0031] Take the boiler circulating sewage containing organic phosphorus, the initial total phosphorus is 5.0mg / L, based on the volume of the sewage, add 200g / L of porous molecular sieves loaded with iron oxide and a particle size of 1.0mm, and adjust the concentration of the sewage with dilute sulfuric acid The pH value is 9, feed 120mg / L of ozone gas, add 30mg / L of sodium persulfate, and react at room temperature for 1 hour.
[0032] After the reaction, the organic phosphorus content in the detected waste water is lower than 0.08mg / L, and the removal rate is greater than 98%. After the oxidation treatment, the total concentration of 150mg / L poly-iron and polyaluminum mixed agent was added to the wastewater. After sedimentation and filtration, the total phosphorus in the wastewater was reduced to 0.24mg / L.
Embodiment 3
[0034] After biochemical treatment, the production wastewater of a pesticide factory that produces glyphosate by the alkyl ester method has an initial total phosphorus of 42 mg / L. Based on the volume of the sewage, 500 g / L of nickel oxide and copper oxide are added, and the particle size is 0.2 mm. Porous molecular sieve, adjust the pH value of the sewage with dilute sulfuric acid to 8.5, feed 1000mg / L of ozone gas, add 100mg / L of 28% hydrogen peroxide and 150mg / L of sodium persulfate, and react at room temperature for 1.5 hours.
[0035] After the reaction is finished, it is detected that the organic phosphorus content in the waste water is lower than 0.22mg / L, and the removal rate is greater than 99%. Add 1500mg / L of ferric chloride to the wastewater after oxidation treatment, and after sedimentation and filtration, the total phosphorus in the wastewater is reduced to 0.43mg / L.
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