Emulsified oil waste water is produced in production processes such as steel and mechanical processing, with a small drainage volume but a high COD concentration of up to 10000 to 37000 meters per year Although traditional treatment techniques such as chemical coagulation have a high removal rate for emulsified oil wastewater, the large amount of sludge produced can easily cause secondary pollution; After wastewater treatment, it cannot be reused, resulting in significant waste of cleaning agents and water; Due to the high content of oil and organic substances in emulsion wastewater, a large amount of coagulants are required, resulting in high operating costs.
The use of ultrafiltration technology to treat emulsified oil wastewater can achieve wastewater reuse and also solve the problem of secondary sludge pollution. Currently, there are many studies in China that use ultrafiltration membranes or microfiltration membranes to treat emulsified oil wastewater, including reports on flat membranes, hollow fiber membranes, ceramic tubular membranes, etc;
But the flux of flat membrane and hollow fiber membrane is low, and the price of ceramic tubular membrane is expensive This article studies the treatment of emulsified oil wastewater using PVDF tubular membranes, which are relatively inexpensive, and provides a technically and economically feasible method for treating emulsified oil wastewater.
