Columnar activated carbon can be used for sewage treatment, and the method of using columnar activated carbon for different sewage will be different. Today I will introduce the difference between refinery sewage and petrochemical sewage purification!
In oil refinery sewage, the adsorbed substances of columnar activated carbon are mainly hydrocarbons. In petrochemical plant sewage, the adsorbed substances contained in it are many kinds and messy.
In refinery wastewater and petrochemical plant wastewater, process wastewater or oily wastewater is a general treatment target. coal activated carbon pellets Because this kind of sewage contains floating oil and suspended matter, it is not suitable to treat it directly with columnar activated carbon.
Therefore, in the treatment of sewage from oil refineries and petrochemical plants, it is necessary to pre-treat by coagulation sedimentation, coagulation pressurization and flotation, sand filtration and their combination methods to remove oil and suspended matter first, and then use activated carbon for treatment. More effective.
In petrochemical plant sewage, there are often no floating substances, but sometimes the BOD value is high or the BOD/COD ratio is high, so it is not necessary to use agglomeration and filtration methods for pretreatment, but it is necessary to use columnar activated carbon adsorption method and activated sludge method, etc. Cooperative use of biochemical treatment methods.
The columnar activated carbon adsorption process can be used alone or in combination with physical and chemical processes or biochemical processes. When biophysical method is used instead of biochemical method and combined with activated carbon adsorption method to treat refinery wastewater, COD drops by 64%, BOD drops by 24%, and solids content drops by 44%. Following the removal of detergents in sewage and exposure The degree of foaming in the gas pool and the corresponding power consumption have also been reduced, without much investment and additional floor space.https://www.chinactivecarbon.com/
At the same time, it is easy to control and adjust the dosage of activated carbon. Following the microorganisms that can regenerate activated carbon, its adsorption activity declines much slower than when activated carbon is filled. At the same time, powdered activated carbon is half cheaper than granular activated carbon, but powdered activated carbon consumes more.