Treatment of washing & bleaching effluent from wheat straw pulping with combined techniques of EGSB,oxidation ditch and advanced oxidation

Washing bleaching eff luent from wheat straw pulping was treated by combined technologies of medium temperature EGSB reactor and oxidation ditch as major units,and advanced oxidation as supplementary unit.The practical results show that after the improvement of the combination process,ammonia nitrogen and total nitrogen can be accordance with the requirement of relevant standards.When COD Cr at the inlet of the system is7880~9600mg/l,the COD Cr after the treatment through major units is less than 210mg/l,with the removal rate up to98.6%;after the advanced oxidation,COD Cr is less than 79mg/l and chroma less than 37.The combined process is stable in water quality at outlet,the final discharge can be accordance with the standard,which can be widely used in the practical application for wheat straw pulp wastewater treatment.