异养硝化好氧反硝化菌对食品工业废水的降解特性研究

Research on Degradation Characteristics of Heterotrophic Nitrification-aerobic Denitrifying Bacteria in Food Industry Wastewater

通过用模拟的食品工业废水来培养8株异养硝化-好氧反硝化菌,以研究8株菌的生化及脱氮除磷性能,为提高食品工业废水处理效率提供理论基础.以琥珀酸钠为碳源、硫酸铵为氮源、磷酸氢二钾为磷源,将8株菌接种于实验室配制的模拟培养基,每隔24 h测定水中OD600、COD、NH3-N、TN和TP浓度.实验结果表明,8株菌生长情况良好并且均具有良好的生化能力和脱氮能力,在初始进水COD为2 310 mg/L、TN为87 mg/L的情况下,COD和TN的去除率最高分别可达到97.2%和89.2%,但除磷效果不明显.说明这8株菌能够在磷源低消耗的情况下,正常生长并表现出良好生化能力和脱氮能力,适合处理N/P较高的食品废水.

In this paper, eight strains of heterotrophic nitrification-aerobic denitrifying bacteria were cultivated in simulated food wastewater, in order to study the degradation characteristics of eight strains. In this experiment, eight strains were cultivated in simulated food wastewater, with sodium suecinate as carbon source, ammonium sulfate as nitrogen source, and dipotassium hydrogen phosphate as phosphorus source, and OD6oo, COD, NH3-N, TN, and TP were detected every 24 hours. The results showed that eight strains of bacteria grew well in simulated food ability. In the initial water with COD of 2 310 mg/L and TN can reach 97.2% and 89.2% respectively, wastewater and have good biochemical and denitrify and TN of 87 mg/L, the highest removal rate of COD but phosphorus removal effect was not obvious. It indicated that this eight strains could degrade COD and TN in low consumption of phosphorus source, and they were suitable for processing food wastewater of high N/P without supplement phosphorus source.