Slaughterhouse existing septic tanks can play a treatment effect, Golog sewage treatment, but the existing effluent concentrations remain high and oil entrainment section, in order to reduce the load on the subsequent treatment facilities, so consider the front end of a grease pool to remove grease. Facilities aerobic - anoxic alternate operating environment to achieve nitrification and denitrification - alternating operation to achieve the effect of nitrogen and phosphorus removal, here by setting the subsequent aerobic pool acid hydrolysis process water back to the pool acid hydrolysis to achieve.