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Compared with the conventional method, the wet oxidation method has the following characteristics
.
(1) High processing efficiency.
Choose appropriate temperature, pressure and catalyst.
WAO can degrade more than 99% of organic matter
.
The effluent of WAO cannot be discharged directly, but its biodegradability is significantly improved, and the toxicity is significantly reduced, which provides a guarantee for the efficiency of its subsequent biological treatment process
(2) Wide range of application WAO can effectively treat all kinds of high-concentration organic wastewater, especially suitable for all kinds of wastewater that are highly toxic and difficult to treat by conventional methods.
It can also be used for the regeneration of adsorbents, the recovery of electroplated metals, and the treatment of radioactive waste.
and so on
.
WAO's application range for the concentration of influent organic matter is also quite wide.
(3) The oxidation rate is fast and the device is small.
The WAO reaction rate depends on the type, concentration and operating conditions of the organic matter
.
Most WAO reactions are completed within 30 to 60 minutes
(4) Low secondary pollution The gas phase products produced by WAO are mainly N 2 , H 2 O, CO 2 , O 2 and a small amount of volatile organic compounds and CO after the reaction , without producing NO and SO 2
.
Usually, no complicated exhaust gas purification system is needed, and the pollution to the atmosphere is the lowest
(5) The WAO process operates under higher temperature and pressure conditions and requires high temperature, high pressure and corrosion resistant equipment
.
Therefore, the one-time investment is relatively large, and the requirements for operation and management technology are relatively high, but the operating costs are relatively low
(6) Recoverable energy and useful substances The reaction heat of WAO system can be used to heat the feed, so that the system maintains heat self-sufficiency.
The higher the feed water concentration, the higher the attainable reaction temperature
.
The reacted high-temperature and high-pressure tail gas can be used to generate electricity and low-energy steam, and the mechanical energy can be used to drive air compressors and high-pressure pumps
