摘要
对驯化微生物处理对硝基苯酚（p-NP）模拟废水进行研究，考察p—NP初始浓度、菌种投加量、葡萄糖添加量、溶液pH值、反应温度等因素对p-NP降解效果的影响．结果表明，当p—NP浓度大于125mg·L^-1时，开始表现出对微生物的抑制作用；当p—NP浓度增高到200mg·L^-1后，微生物降解效果不理想；而当p—NP浓度为150mg·L^-1时，微生物接种量大于2．75g·L^-1，可获得最大平均降解速率．此外，适量添加葡萄糖，可促进微生物对p-NP的降解。但葡萄糖浓度超过0．55g·L^-1以后，底物竞争会对p-NP的降解形成抑制．实验最后得出，生物降解p—NP的适宜pH值为7．0～8．0，适宜温度范围为25～35℃．
The effect of the initial concentration of p-nitrophenol, biomass inoculation, the adding amount of glucose, pH and temperature on the degradation of p-nitrophenol by the cultivated microorganisms were investigated in the flask culture experiments. The results showed that substrate inhibition appeared when the concentration of p-nitrobenzopheol was higher than 125 mg·L^-1 , and the bio-degradation was suppressed when p-nitrophenol concentration reached 200 mg·L^-1. The maximal degradation rate was achieved when the biomass inoculation was more than 2.75 g·L^-1 with an initial p-nitrophenol concentration of 150 mg·L^-1. The bio-degradation of p-nitrophenol could be accelerated with the addition of certain amount of glucose （less than 0.55 g·L^-1 ）. The bio-reduction could be achieved efficiently in the temperature range of 25～35℃ and a pH range of 7.0～8.0.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2006年第4期418-421,共4页
Journal of Huaqiao University(Natural Science)
关键词
对硝基苯酚
废水处理
生物降解
驯化微生物
p-nitrophenol, wastewater treatment, bio-degradation, cultivated microorganism
作者简介
周作明（1975-），男，讲师，主要从事环境生物技术的研究．E-mail：zhoujing@hqu．edu．cn
