微生物浓度对SFBR工艺去除营养物的影响

Effect of Concentration of Microorganism on Nutrient Removal in Sequential Fed-batch Reactor

采用序半连续式反应器(SequentialFed-batchReactor,简称SFBR,下同。)就不同微生物初始浓度对人工配置废水营养物去除效率的影响进行了研究。探讨了微生物初始浓度对COD、氮化合物(NH4-N和NO3-N)除去和微生物生长的影响。结果表明,当微生物初始浓度为140.4g/L时,COD有最高除去率(69.5%)。当微生物初始浓度≥46.8g/L,总氮除去率可达100%。菌体初始浓度对废水中营养物的去除有利。过高浓度的微生物生长,受营养物和供氧的限制。用一组涉及多个微生物反应的动力学模型,分析了微生物初始浓度对同时去除碳、氮化合物效率和微生物生长的影响。

Nitrogenous substrate was removed by sequencing nitrification and denitrification in a cycle of sequential fed-batch reactor(SFBR)operation.The effect of initial concentration of microorganism on removal efficiency of COD and nitrogenous compounds was investigated.Results indicated that the highest removal efficiency of COD was 69.5% when initial concentration was 140.4g/L while removal efficiency of total nitrogen was up to 100% at the initial concentration of microorganism above 46.8g/L.The multiple microbial reactions involved in the simultaneous removal process of carbonaceous and nitrogenous components in SFBR system were analysed using a set of kinetic mathematical model.