Wastewater treatment device and method

Abstract

The invention relates to the technical field of food additive emulsifier wastewater treatment, in particular to a wastewater treatment device and method. The apparatus comprises: an apparatus body; the device comprises a film evaporator, a saponification heating kettle, first molecular distillation equipment and second molecular distillation equipment, wherein the liquid discharge end of the filmevaporator is connected with the liquid inlet end of the saponification heating kettle, the liquid discharge end of the saponification heating kettle is connected with the liquid inlet end of the first molecular distillation equipment, the liquid discharge end of the first molecular distillation equipment is connected with the liquid inlet end of the second molecular distillation equipment, and the liquid inlet end of the film evaporator is connected with a waste liquid buffer device. The wastewater treatment device is used for carrying out advanced treatment on wastewater, so that the problems of high COD concentration, difficulty in treatment and large impact on a sewage treatment system caused by direct discharge of the wastewater are relieved, light and heavy component fatty acids prepared from the wastewater are recycled, waste utilization is realized, the input cost of raw materials is relatively reduced, and certain benefits are improved.

Description

technical field [0001] The invention relates to the technical field of food additive emulsifier wastewater treatment, in particular to a wastewater treatment device and method. Background technique [0002] Countries around the world have different definitions of food additives. The United Nations Food and Agriculture Organization (FAO) and the World Health Organization (WHO) Joint Food Regulation Committee define food additives as: food additives are consciously added to food in small amounts to improve food. Non-nutritive substances of appearance, flavor and texture or storage properties. [0003] Emulsifier is the most common type of food additive. Emulsifier is a class of compounds that can make a mixed liquid of two or more components that are immiscible with each other form a stable emulsion. The principle of its action is that during the emulsification process, the dispersed phase is dispersed in the continuous phase in the form of droplets (micron scale), and the ...

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Problems solved by technology

[0004] In actual production, many food additive emulsifiers will produce waste water during the production process. The waste water contains a certain amount of organic matter such as glycerin, fatty acid, and oil. The waste water is directly discharged into the sewage treatment system. These organic matter have high COD concentration and are difficult to treat. The sewage treatment system has a large impact, resulting in the enterprise's wastewater discharge not meeting the standard

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