Method for removing anion surfactant from waste water

Abstract

The present invention discloses a method to wipe off the activator on the surface of the negative ion in the wastewater. The present invention is characterized in that: the wastewater is treated by the technical of acidification, filter, and polysaccharide adsorption of the fibrin solid shell; the acidification to filter to polysaccharide adsorption of the fibrin solid shell. The technical of the polysaccharide adsorption of the fibrin solid shell is to dissolve the shell polysaccharide in the acid water solution first and then to adjust the solution to the alkalescence by the alkali, finally, the shell polysaccharide is separated out on the fibrin to become an adsorption material. The content of the shell polysaccharide in the adsorption material is 1-6 percent. The polysaccharide adsorption of the fibrin solid shell is put into the PolyvinylChloride tube to make a composite adsorption pole. The treatment process for the wastewater is that: the acid water solution is added into the wastewater first, and then the pH value of the wastewater is adjusted to 5 plus or minor 0.5, and the wastewater is deposited and filtered. And then the wastewater flows through the composite adsorption pole of the polysaccharide adsorption of the fibrin solid shell to be treated. The polysaccharide adsorption of the fibrin solid shell after being used is washed by the alkaline water solution and then to be recycled. The present invention has the advantages of short treating process, simple treating device, low energy consumption, fast adsorption speed, recyclable and reusable composite adsorption and low treating cost and so on.

Description

technical field [0001] The invention relates to a method for removing anionic surfactants in waste water. Specifically, relate to a kind of polluted by one or more anionic surfactants in anionic surfactants such as sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, etc. wastewater treatment methods. Background technique [0002] At present, the methods commonly used to treat this kind of wastewater mainly include coagulation sedimentation method, activated carbon adsorption method, foam separation method, membrane method, catalytic oxidation, micro-electrolysis method and biological method. Although these methods are applied to varying degrees when treating this type of wastewater, they all have certain limitations and need to be further improved: the coagulation and sedimentation method is a more commonly used method, and the commonly used coagulants include iron salts, aluminum Salt and organic polymers, but because it will produce a large amount of waste residue a...

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Problems solved by technology

Although these methods are applied to different degrees when treating this type of wastewater, they all have certain limitations and need to be further improved: the coagulation and sedimentation method is a more commonly used method, and the commonly used coagulants include iron salts, aluminum Salt and organic polymers, but because it will produce a large amount of waste residue and sludge, it is easy to cause secondary pollution; the activated carbon adsorption method has a good adsorption effect on surfactants at room temperature, but the regeneration of activated carbon consumes a lot of energy, and regeneration The final adsorption capacity will be reduced to varying degrees, which limits its application; the foam separation method uses the characteristics of surfactants, especially anionic surfactants, which are easy to generate foam, and separates them from water by gas adsorption. Due to the need for a large amount of gas, Therefore, the energy consumption is high, and the investment in fixed equipment is large; the membrane separation method mainly uses the permeability of the membrane to achieve the purpose of separating ions, molecules and some particles in the mixture (such as a solution). However, the membrane is expensive and the membrane is easy to clog , Higher requirements for wastewater pretreatment is its main disadvantage

The catalytic oxidation method is an improvement and strengthening of the traditional chemical oxidation method, but it is not suitable for large-scale promotion and application due to large equipment investment, high energy consumption, and high operating costs.

The micro-electrolysis method is suitable for the pretreatment of refractory industrial wastewater, but this method consumes a lot of electricity, and when the hydrolysis is intensified, a large number of bubbles are generated, which affects the electrolytic removal rate

The biological method can directly treat alkaline surfactant wastewater, but the treatment cycle is long, and the toxic substances contained in the wastewater will seriously reduce the treatment effect

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