Water treatment method for ultrasonically improving oxidation of pollutant with permanganate

A technology of permanganate and ultrasonic enhancement, applied in the field of water treatment, can solve the problems of poor dispersion of nascent nano-manganese dioxide, slow oxidation speed of permanganate, unstable treatment effect, etc. Stable and easy-to-control effects

Inactive Publication Date: 2011-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of slow permanganate oxidation speed, unstable treatment effect, easy penetration, and poor dispersion of newborn nano-manganese dioxide in the oxidation process of permanganat

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific embodiment one: this embodiment utilizes the water treatment method of supersonic strengthening permanganate to oxidize pollutants to carry out according to the following steps: one, the water to be treated enters the pretreatment unit, dosing permanganate and 2. The effluent of the pretreatment unit flows into the mixing tank, and coagulant is added, mixed and stirred, flows into the flocculation tank for flocculation, and then flows into the sedimentation tank; 3. The effluent of the sedimentation tank enters the clear water tank after being filtered, and is disinfected After that, the water treatment of pollutants oxidized by ultrasonic enhanced permanganate is completed; the pretreatment unit in step 1 uses a pipeline or a separate pool as the reactor, and when the pipeline is used as the reactor, the flow rate is 1-1.5m / s, When a single tank is used as a reactor, the tank is connected to the mixing tank; in step 1, the dosage of permanganate is 0.1-10 mg / L,...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the dosage of permanganate in step one is 0.1mg / L, the ratio of inducer and permanganate is 1:10, and the ultrasonic power density is 1W / cm 2 , Ultrasonic action time is 5min. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the dosage of permanganate in step one is 10mg / L, the ratio of inducer and permanganate is 1:1, and the ultrasonic power density is 200W / cm 2 , Ultrasonic action time is 10s. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a water treatment method, particularly a water treatment method for ultrasonically improving oxidation of pollutants with permanganates, and aims to solve the problems in the prior art the speed of oxidation with permanganates is slow, the treatment effect is not stable, the dispersion of produced manganese dioxide nanoparticles is poor and the catalytic rate is low. The method has three forms. The first form comprises the following steps of: pre-treating water; feeding the effluent into a mixing pond, a flocculation pond and a precipitation pond in sequence; filtering the effluent; feeding to a clear water pond and sterilizing. The second form comprises the following steps of: feeding the water into a mixing pond and then pre-treating the water, feeding the effluent to a flocculation pond and then a precipitation pond, filtering the effluent, feeding to a clear water pond and sterilizing. The third form comprises the following steps of: feeding the water into a mixing pond; adding permanganates, inducers and coagulants under ultrasonic action; feeding the effluent to a flocculation pond and then a precipitation pond; filtering the effluent; feeding to a clear water pond and sterilizing. The method has stable operating effects, is favorable for the dispersion of manganese dioxide nanoparticles which are used as the reduction product of permanganates, improves the catalytic ability of manganese dioxide in oxidation of permanganates, and promotes the decomposition of permanganates to produce highly-active intermediate-state manganese.

Description

technical field [0001] The invention relates to a water treatment method. Background technique [0002] Toxic and harmful pollutants (such as persistent pollutants, endocrine disruptors, medicines and personal care products, etc.) introduced in the process of human production and life pose a serious potential threat to the safety of drinking water in cities. Conventional water treatment processes cannot meet the new Sanitary Standards for Drinking Water, and new technologies are urgently needed to ensure water quality safety. Existing urban water supply plants generally use permanganate and permanganate compound agent oxidation process, which has been widely used in water plants in my country, which can remove odor, color, turbidity, algae toxins, and disinfection by-products in water Precursor, controlling the growth of algae and stabilizing the quality of effluent. At the same time, this process also has the problems of slow oxidation speed of permanganate, unstable treat...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 马军杨晶晶赵吉江进
Owner HARBIN INST OF TECH
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