味精稀废水水解──接触氧化──混凝处理

Treatment of Low Concentration Monosodium Glutamate Wastewater by Hydroysis - Contact Oxidation

采用水解──膜法──混凝处理系统，进水CODcr，2300mg／L，调节废水pH至7．5，以水解14h，以气水比25：1，曝气22h后，出水CODcr140mg／L，CODcr去除率达94％，再经混凝处理，以0．4kg／m3废水投PAC，出水CODcr44mg／L，CODcr去除率85％，整套系统CODcr去除率达99％，出水达到污水综合排放标准（GB888－96）一级标准．

This paper presents hydrolvsis-film-coagulation treatment system. The result shows that under 7. 5 of pH hvdrolvsis with 14 hours 25: 1 of air- water rate and aefahon with 22 hours, CODcr can be reduced from 2300 mg/L to 140mg/L with 94 %of retnoval rate . Furthermore. CODcr can be reduced to 44 mg/L with 85% of removal rate by coagulauon treatrnem dosmg PAC with 0. 4 kg/m3 of wastewater the removal raate of whole system is 99 %. The emuent can meet the first grade standard of nahonal tmegrated Wastewater Discharge Standard.