Method for processing negative ion surface active agent in wastewater

Abstract

The invention discloses a method for processing negative ion surface active agent in wastewater, belonging to the field of chemical environmental protection and adopting the steps of wastewater acidification pretreatment, filtration, quaternary ammonium cationic cellulose composite adsorption column adsorption, and the like; and the process route of treatment is short, and the concentration of negative ion surface active agent in the treated water is greatly lower than the national wastewater discharge standard. The processing method of the invention has the advantages of simple process equipment, low energy consumption, high adsorption speed and large adsorption capacity, adsorbent can be used in the way of regeneration and circulation, the processing cost is low, and raw materials used for preparing the quaternary ammonium cationic cellulose has low production cost and wide range of acquisition, is non-toxic, can not cause secondary pollution to environment, etc.

Description

Technical field: [0001] The invention relates to a method for treating anionic surfactants in waste water, which belongs to the field of chemical environmental protection. Background technique: [0002] At present, the methods commonly used to treat this kind of wastewater mainly include activated carbon adsorption method, foam separation method, photocatalytic oxidation method, ultrasonic degradation method, membrane filtration technology, chemical flocculation method and microbial method. Although these methods have varying degrees of application in the treatment of this type of wastewater, they all have certain limitations and need to be further improved: the activated carbon adsorption method has a better adsorption effect at room temperature, but the regeneration energy consumption of activated carbon is large, and the adsorption after regeneration The capacity will be reduced to varying degrees, which limits its application; the foam separation method is simple in proc...

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Problems solved by technology

Although these methods have varying degrees of application in the treatment of this type of wastewater, they all have certain limitations and need to be further improved: the activated carbon adsorption method has a better adsorption effect at room temperature, but the regeneration energy consumption of activated carbon is large, and the adsorption after regeneration The capacity will be reduced to varying degrees, which limits its application; the foam separation method is simple in process, easy to operate, and stable in operation, but this method will cause the transfer of anionic surfactants during the treatment process, pollute the air, and cause disease. Bacteria also spread together, thereby increasing the risk of epidemics; photocatalytic oxidation method needs to be continuously aerated into it during the treatment process to ensure sufficient dissolved oxygen, and the operating cost is high; the degradation ability of ultrasonic degradation method is affected by pH Larger, the degree of degradation increases with the increase of ultrasonic power and action time; membrane filtration technology has high separation efficiency and simple process, but the membrane is expensive and easy to block; chemical flocculation method has a certain treatment effect on anionic surfactants, However, in the process of treatment, calcium oxide needs to be used as a coagulant, and waste residue and sludge will be generated, and improper treatment will cause secondary pollution; the investment and operation costs of microbial treatment are relatively low, but its application conditions and availability The selection of microorganisms is limited, and low concentrations of anionic surfactants will cause microbial proliferation, and high concentrations of anionic surfactants will inhibit the growth of organisms

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