Industrial wastewater treatment method

Abstract

The invention discloses an industrial wastewater treatment method. The industrial wastewater treatment method comprises the following steps: S1, pretreatment; s2, feeding water into an adsorption tank I, and adsorbing organic matters through resin; s3, stopping feeding water after the first adsorption tank reaches the working exchange capacity, feeding water into the second adsorption tank and adsorbing, and feeding the resin in the first adsorption tank into a desorption tank through a resin transfer pipe to desorb the resin in the desorption tank; s4, after the resin in the desorption tank is desorbed, transferring the resin to an adsorption tank I through a resin transfer pipe; s5, stopping feeding water after the second adsorption tank reaches the working exchange capacity, feeding water into the first adsorption tank and adsorbing, and feeding the resin in the second adsorption tank into a desorption tank through a resin transfer pipe to desorb the resin in the desorption tank; s6, after the resin in the desorption tank is desorbed, the resin is transferred to an adsorption tank II through a resin transfer pipe; and S7, repeating the steps S2-S6. According to the technical scheme, the process of adsorption and desorption in a resin tank in the prior art is improved into the process of in-vivo adsorption and in-vitro desorption, and the desorption effect of polluted resin is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a method for treating industrial wastewater. Background technique [0002] Industrial wastewater, especially phenol cyanide wastewater, needs to be treated before it can meet the discharge standards. The conventional treatment methods of phenol cyanide wastewater require biochemical treatment, advanced treatment and salt separation treatment. Contains organic matter, and the organic matter accumulated during the membrane filtration step can block the filter pores in the membrane, thereby seriously affecting the service life of the membrane. In the prior art, it has been disclosed to use an organic adsorption device to treat wastewater to reduce the organic content in it. However, in the conventional adsorption device and method, when a medium with weak adsorption is used for adsorption, the desorption effect is good, but the adsorption effect is relatively low. ...

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Problems solved by technology

[0002] Industrial wastewater, especially phenol cyanide wastewater needs to be treated to meet the discharge standards. The conventional treatment methods of phenol cyanide wastewater need to carry out biochemical treatment, advanced treatment and salt separation treatment. Contains organic matter, and the accumulated organic matter during the membrane filtration step will block the filter pores in the membrane, which will seriously affect the service life of the membrane

It has been disclosed in the prior art to use an organic matter adsorption device to treat wastewater to reduce the organic matter content therein. However, in conventional adsorption devices and methods, when a medium with weak adsorption is used for adsorption, the desorption effect is good but the adsorption effect is relatively low. Poor, when the medium with strong adsorption is used for adsorption, the desorption effect is insufficient, resulting in high cost

For example, the existing adsorption method is to use a resin tower to adsorb organic matter. After the resin has been adsorbed for a certain period of time, it needs to perform in-situ desorption in the resin tower to restore the adsorption capacity of the resin. However, due to the structural characteristics of the adsorption tower, the When the desorption device is installed in the adsorption tower, the desorption effect is not satisfactory, and the desorption device needs to be matched with the adsorption device, resulting in high cost

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