摘要
以 PVA为载体 ,采用冷冻法混合固定硝化菌和反硝化菌 ,研究硝化菌与反硝化菌的比例、有机碳源、p H值、碱度、温度和DO等因素对单级脱氮过程的影响 .试验结果表明 :当硝化菌 /反硝化菌 =1 .5∶ 1～ 3.6∶ 1 ( W∶ W)时 ,脱氮速率最快 .在甲醇、乙醇、醋酸和葡萄糖 4种有机碳源中 ,以乙醇为碳源时脱氮速率最快 .最适的温度、p H值和 DO分别是 30℃、8.2和 2 mg/L～ 6mg/L.碱度与氨氮的比例越高 ,脱氮速率越快 ,但当碱度 /氨氮 >9.0时 ,脱氮速率趋于稳定 .
The effects of the ratio of nitrifying bacteria/denitrifying bacteria,organic carbon source,pH,alkalinity,temperature and DO on single stage biodenitrification process by coimmobilized nitrifying bacteria and denitrifying bacteria were studied in this paper.The results showed that the total inorganic nitrogen(TIN)removal rate was the quickest while the ratio of nitrifying bacteria/denitrifying bacteria was between 1 5/1 and 3 6/1( W/W ) and organic carbon source was ethanol out of methanol,acetic acid and glucose.The optimal pH,DO,and temperature was about 8 2,2mg/L～6mg/L and 30℃ respectively.The activation energy of the single stage biodenitrification process was calculated as 28 6 kJ/mol.The TIN removal rate increased as the ratio of alkalinity/ammonia nitrogen increased,but when the ratio of alkalinity/ammonia nitrogen was over 9 0,the TIN removal rate tended to be stable.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第3期40-41,共2页
Environmental Science
基金
国家自然科学基金资助项目 ( Project Supported by theNational Natural Science Foundation of China) :2 97770 0 7
关键词
生物脱氮
硝化细菌
反硝化细菌
固定化
废水处理
biodenitrification,nitrifying bacteria,denitrifying bacteria,immobilization.
