Technique for pretreating aniline-containing wastewater by adopting resin adsorption method

Abstract

The invention relates to a technique for pretreating aniline-containing wastewater by adopting a resin adsorption method. The technique comprises the following steps: (1) feeding the aniline-containing wastewater into a pre-stage raw wastewater tank through a first-level filter, conveying the wastewater in the raw wastewater tank into a fine filter, and filtering out the mechanical impurities; (2) after filtering out the mechanical impurities, continuously feeding wastewater into a first resin absorbing tower and a second resin absorbing tower in turn through a circulating pump, performing two-stage continuous absorption on the aniline-containing wastewater entering the resin absorbing towers through the resin columns in the absorbing towers, and absorbing the aniline in the wastewater to the upper surface; and (3) after absorbing the resin, feeding the pretreated wastewater into a wastewater treating pond through a wastewater pump, activating the treated resin columns and recycling. The invention has the advantages that the resin adsorption method is adopted for absorbing the aniline in the aniline wastewater, and the treating method can effectively treat the wastewater and can realize the waste resource recycling.

Description

technical field [0001] The invention relates to a waste water treatment process, in particular to a resin adsorption method for pretreatment of waste water containing benzene [0002] Amine Wastewater Process. Background technique [0003] At present, BTA is mainly synthesized by one-step pressurized reaction of o-phenylenediamine and sodium nitrite, and TTA is mainly synthesized by one-step pressurized reaction of methyl-o-phenylenediamine and sodium nitrite. However, in the production process, organic pollutants with complex structure, deep color, difficult biodegradation, high biotoxicity and poor biodegradability will be generated, so that the content of anilines in wastewater sometimes reaches as high as 8000-10000mg / L. Aniline wastewater usually has the following characteristics: [0004] (1) The structure of pollutants is complex and the concentration is high [0005] This type of wastewater generally has a complex pollutant structure and high solubility in water, ...

AI Technical Summary

Problems solved by technology

[0004] (1) The structure of pollutants is complex and the concentration is high

[0005] This type of wastewater generally has a complex pollutant structure and high solubility in water, so the concentration and COD of this type of wastewater in water are several thousand to tens of thousands mg/L

[0006] (2) High salt content

[0008] (3) Wastewater is highly acidic (alkali)

[0009] (4) deep color

The BOD/COD value of aniline substances in water is low, generally inhibits the growth of microorganisms, and has poor biodegradability. It is difficult to achieve the desired effect with conventional biochemical methods.

[0013] (6) High biological toxicity

For example, in the extraction treatment method, the extraction agent is easily lost and causes secondary pollution, and at the same time, the energy consumption is high, and the operation is relativel