Potassium hypermanganate and chloride united controlled milipore filter algae pollution pretreating method
A potassium permanganate, combined control technology, used in water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of high ozone infrastructure costs and equipment investment, affecting drinking water safety, and inappropriate Emergency treatment and other problems to achieve the effect of improving algae removal rate, reducing self-use water consumption, and reducing infrastructure investment
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[0015] Example 1
[0016] Add potassium permanganate and chlorine to the algae-containing water of the reservoir, the dosage of potassium permanganate is 0.3-2mg / l, and the dosage of chlorine is 0.2-3mg / l. The combination of the two can achieve a better treatment effect. Under different dosage ratios, both have a better algae removal effect. Compared with pre-chlorination alone, the removal rate of organic matter can be increased by more than 20%. The removal rate of manganese is increased by more than 30%, and the removal rate of algae is increased by more than 40%.
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[0017] Example 2
[0018] Add potassium permanganate and chlorine two oxidants to the water containing algae. The dosage of potassium permanganate is 0.3~2mg / l, and the dosage of chlorine is 0.2~3mg / l. Both oxidants are added at the same time. Add coagulant basic aluminum chloride 1~10mg / l, after the pipeline is quickly mixed, after 5~10 minutes flocculation reaction, the supernatant is pumped into the ultrafiltration membrane by the lift pump, and filtered through the crossflow of the ultrafiltration membrane module , The reflux ratio is controlled at 80-90%. The ultrafiltration membrane used is of hollow fiber structure and organic synthetic material. The operating pressure of the ultrafiltration membrane during operation is 0.05~0.2MPa, the backwash period is 45~120 minutes, and the backwash intensity is 200~300L / m 2 h, the backwash time is 30 to 90 seconds. Compared with pre-chlorination alone, the ultrafiltration membrane backwash cycle can be extended by 15 to 45 minutes, th...
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[0019] Example 3
[0020] The difference between this example and example 2 is that the coagulant used is ferric chloride, the dosage is 3-15mg / l, the flocculation reaction time is 10-20 minutes, and the reflux ratio is controlled at 80-95 %. The backwash time is 30 to 120 seconds. Compared with pre-chlorination alone, the ultrafiltration membrane backwash cycle can be prolonged by 20 to 45 minutes, the removal rate of organic matter, iron, and manganese can be increased by more than 20%, and the removal rate of the influent algae of the ultrafiltration membrane can be increased by more than 45%. Others are the same as in Example 2.
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