How to treat cosmetic wastewater? What type of flocculant is the most suitable? You can first understand the main pollutants in cosmetic wastewater to determine the appropriate treatment methods and water treatment agents.
Through investigation and research, the pollutants of cosmetics wastewater mainly include oil, detergent, biodegradable substances, pigments, spices and so on. Among them, the grease mainly comes from the detergent used in the production process of cosmetics, which contains Yin and cationic detergents, and these detergents contain grease components. Biodegradable substances are mainly glycerol octadecyl alcohol, glycerol semi-stearate and other oil pollutants and some cosmetic additives, these substances have a high degree of emulsification, containing toxic and harmful substances. Cosmetics wastewater contains ingredients such as pigments and fragrances. In addition, the COD and BOD values of cosmetic wastewater are low and contain a certain amount of ammonia nitrogen. Due to the complex composition of raw materials and long production process, the composition of polluting substances in sewage is varied and complicated, which increases the difficulty of sewage treatment.
To sum up, cosmetic wastewater treatment is a multi-step process that aims to remove various harmful substances contained in wastewater to meet discharge standards and recycling requirements. The following are the main steps of cosmetic wastewater treatment:
Pretreatment: This is the first step in wastewater treatment, including the regulation of pH, separation of organic and inorganic mixtures, heavy metals, etc. In addition, the wastewater needs to be extracted to facilitate the subsequent treatment process.
Regulating tank: The wastewater first enters the regulating tank, and then adjusts the amount of water stored according to the daily output of the cosmetics factory.
Flocculation reaction: The regulated wastewater is flocculated by adding an agent (such as a flocculant decolorizing agent), and the resulting flocculant is then transported to the diaphragm filter press for centrifugal dehydration.
Biochemical treatment: The wastewater treated by flocculation will enter the biochemical stage, including anaerobic tanks, sedimentation tanks, anoxic tanks, etc., to remove organic matter in it. The water after the biochemical reaction will be sent to the activated carbon resin pool for adsorption. After the adsorption reaches a certain degree, the system will automatically regenerate the reagent.
Membrane treatment: In some cases, membrane treatment technology is also applied for filtration to further remove impurities and suspended matter.
Discharge treatment: The treated water needs to meet local discharge standards and meet limits on the total amount of pollutants discharged from wastewater.
Sludge treatment: The use of sedimentation tanks for sludge separation to reduce the production of sludge and the complexity of the treatment process.
Decolorization and deodorization: The content of organic matter can be reduced by light, ion exchange, activated carbon adsorption, reverse osmosis and other methods to achieve the purpose of decolorization and reduce odor.
Other treatment technologies: biological contact oxidation, ion exchange, photocatalytic oxidation and other technologies may also be used to further treat wastewater.
In the flocculation reaction stage of the above water cosmetics wastewater treatment process, flocculating decolorants are recommended for the types of wastewater pollutants. The organic polymer complex with multiple functions such as decolorization, flocculation, COD reduction and BOD is a flocculating decolorization water treatment agent, which has a wide range of wastewater decolorization and does not affect the biochemical system. The product has, adds small amount, decolorization flocculation settling speed is fast. Professional for wastewater color problems, high decolorization rate, COD removal, less sludge, no secondary pollution and other advantages. Reduce the cost of cosmetic wastewater treatment and ease the pressure on enterprises to protect the environment.
中文
English
