Five kinds of industrial wastewater treatment processes
01
Biological treatment
Biological treatment methods mainly include activated sludge method, biological aerated filter, constructed wetland and so on. Among them, activated sludge method is a common biological treatment method, by adding a certain amount of microbial flora in the reaction tank for degradation, the organic matter in the wastewater decomposition into harmless carbon dioxide, water and organisms, etc
02
Physicochemical treatment
Physical and chemical treatment methods include precipitation method, filtration method, adsorption method, oxidation method, etc. Precipitation method is one of the most common physical and chemical treatment methods. By adding a certain amount of chemical agents to react with pollutants in wastewater, the pollutants are transformed into solid substances that are easy to precipitate and removed in subsequent treatment.
03
Membrane treatment
Membrane technology mainly includes ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, etc., which has the advantages of high efficiency and energy saving. In the process of treatment, the wastewater passes through the membrane separation device, which can separate the dissolved ions and suspended matter in the wastewater, so as to achieve the purpose of purification.
04
Activated carbon adsorption treatment
Activated carbon adsorption treatment method is mainly to use activated carbon of high specific surface area, large aperture and other characteristics, adsorption of organic matter and trace heavy metals in wastewater, so as to achieve the purpose of purification.
05
Electrochemical treatment
Electrochemical treatment mainly includes electrodeposition, electrolytic oxidation, electrolytic reduction and so on. Among them, electrodeposition can be used to remove heavy metal ions, electrolytic oxidation can be used to remove refractory organic matter, electrolytic reduction is mainly used to recover metal ions in wastewater.
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