【摘要】 一般来说硝化细菌对环境条件的变化比较敏感,而在低浓度氨氮系统中,硝化细菌对环境条件变化的敏感度比高浓度系统更大,而且其影响规律也有所不同。用富集培养的硝化细菌就温度、pH和碱度对高、低浓度氨氮硝化的影响做了研究。结果表明,低浓度氨氮硝化的温度系数(θ=1.105)大于高浓度(θ=1.099),温度对低浓度氨氮硝化的影响较高浓度大;偏碱性的环境更有利于低浓度氨氮硝化的进行,因此低浓度氨氮硝化的最优pH和Alk/N值都较高浓度高。和温度相比,pH和碱度是影响低浓度氨氮硝化过程的主要因素。更多还原

【Abstract】 Nitrifying bacteria are very sensitive to the changes of environmental conditions, especially at a low ammonia concentration environment. Effects of temperature, pH and alkalinity on nitrification were determined using enriched nitrifying bacteria. The temperature effect was slightly greater at NH₃-N = 3 vs. 100 mg/L. The alkaline condition was favorable to achieve complete nitrification at a low ammonia concentration. pH and alkalinity had greater impacts than temperature on nitrification at low ammonia concentration.更多还原