高氨氮味精废水的亚硝化/反亚硝化脱氮研究

A study on removing nitrogen from highly nitrogenous MG wastewater with process of shortened nitrification/denitrification

两段SBR法处理经稀释的味精废水有良好的有机质降解和脱氮效果 .整个生物处理过程可分为碳氧化阶段和三个亚硝化 /反亚硝化阶段 .碳氧化阶段主要是有机质的降解和曝气吹脱除氮 ,随后通过亚硝化 /反亚硝化反应实现生物脱氮和有机物的降解 .SBRⅠ碳氧化阶段废水中有机质浓度较高 ,在降解过程中消耗废水中的溶解氧 ,竞争性抑制了亚硝化反应的发生 .而亚硝化 /反亚硝化反应的形成是由于游离氨 (FA)

The dilute N rich monosodium glutamate(MG)wastewater was treated by two stage SBR process.The process can be divided into carbon oxidation stage and three shortened nitrification/denitrification stages.The pathway of nitrogen removal from N rich MG wastewater was proved to be via stripping with carbon oxidation stage and shortened nitrification/denitrification subsequently.In the carbon oxidation stage,DO was consumed by high concentrations of organic compound so that nitrification was repressed,Inhibition of nitrite oxidation by free ammonia(FA)resulted in the formation of shortened nitrification/denitrification process.