Oxidative decomposition method of organic pollutant in water
A technology for the oxidative decomposition of organic pollutants, applied in the field of oxidative decomposition of organic pollutants in water, can solve the problems of low catalytic efficiency, high price, and difficult practical application, and achieve the effects of saving dosage, flexible and convenient use, and easy operation and management
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Embodiment 1
[0024] A gas plant produces an average of 2,000 cubic meters of wastewater per day, and the main organic pollutants are phenols, including unit phenols and polyphenols. After secondary biological treatment of wastewater, the residual COD concentration is around 300-400mg / L, which is difficult to discharge up to the standard. Diatomaceous earth catalytic ozonation technology is used for advanced treatment of wastewater, and it is found that organic matter in wastewater can be effectively decomposed. Under a certain oxidation time condition, the biodegradability (BOD / COD value) of the treated water is significantly improved, and then biologically activated carbon is added. process (BAC) (eg figure 2 shown), the treated effluent can meet the national first-level discharge standard (COD<100mg / L).
Embodiment 2
[0026] The tank truck of a chemical transportation company cleans the organic wastewater, the water volume is small and the chemical composition is complex (as shown in Table 1). The transported chemicals such as chloroform, dichloroethane, diethylene glycol, ethylene glycol, diethanolamine, butanone, crude benzene, acrylonitrile, etc. are all refractory substances. The use of diatomite catalytic ozonation technology to decompose organic matter can significantly improve the biodegradability of wastewater, followed by biologically activated carbon technology, the microorganisms grow well, the treated water can meet the discharge standards, and can even be reused for car washing.
[0027] Table 1 Types of organic chemicals transported in tanks
[0028] serial number
[0029] 8
[0030] 11
Embodiment 3
[0032] A method for oxidative decomposition of organic pollutants in water in a factory. This method uses diatomite and its modified products as catalysts for ozonation and decomposition of organic pollutants in water. Pollutants in the water and ozone are fully contacted and reacted. The advanced oxidation reactor is divided into two parts: the reaction zone and the precipitation zone connected up and down. Pollutants in water are mixed and reacted to form a diatomite catalytic ozonation process. In the precipitation zone, the catalyst is separated from the treated water, and the separated catalyst is returned to the reaction zone.
[0033] The diatomite is natural diatomite with a particle size of 5 microns and a relatively fast self-settling speed. It is separated from water in the precipitation area set in the advanced oxidation reactor and returned to the reaction area for repeated use, with a long service life. .
[0034] The modified product of diatomite includes surfa...
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