Abstract
A system and a method for treating a salt-containing glycerin wastewater, wherein the system for treating the salt-containing glycerin wastewater includes a mixing tank, a filtering device, a distillation column and a water supply device. The mixing tank is used to mix a salt-containing glycerin wastewater and a concentrated hydrochloric acid to obtain a mixture. The filtering device is communicated with the mixing tank, and the mixture is filtered by the filtering device to obtain an acidic filtrate and a precipitated salt. The distillation column is communicated with the filtering device and receives the acidic filtrate from the filtering device. The water supply device supplies water to the acidic filtrate. The system and method for treating the salt-containing glycerin wastewater can effectively recycle hydrochloric acid.