摘要
以Corynebacterium sp.NNC-3为受试菌株,就初始细胞密度对苯酚降解反应的影响进行了研究。结果表明,初始苯酚浓度为100～600 mg/L,初始细胞密度在0.05～0.30(OD600)范围内时,随着初始细胞密度的增大,菌株NNC-3降解苯酚的平均速率迅速增加;进一步增大初始细胞密度,菌株NNC-3降解苯酚的速率不再随初始细胞密度的增大而升高,菌株NNC-3降解苯酚的能力趋于饱和状态;初始苯酚浓度为600～800 mg/L时,菌株NNC-3降解苯酚的能力趋于饱和状态,且苯酚的降解速率呈现逐渐下降趋势,表明此时底物浓度为菌株NNC-3降解苯酚的限制性因素。研究成果对高效处理受酚污染环境具有一定的参考价值。
The effect of initial cell density on phenol degradation by Corynebacterium sp. NNC-3 was studied. The experimental results showed that as the initial cell density increased the average rate of phenol biodegradation increased at the initial phenol concentration of 100 ~ 600 mg/L and the initial cell density of 0. 050 - 0. 300 （ OD600 ）. However, further increase in initial cell density did not cause the change of phenol biodegradation rate. It was indicated that the initial cell density was the suppression factor of phenol biodegradation. The rate of strain NNC-3 biodegrading phenol declined gradually at the initial phenol concentration of 600 -800 mg/L. It was suggested substrate concentration was th results contributed to the biod e suppression factor of phenol biodegrading by strain NNC-3. egradation efficiency of phenol in contaminated environment. that All not was the the
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2013年第3期663-667,共5页
Journal of Guangxi University（Natural Science Edition）
基金
广西青年基金资助项目(桂科青0728005)
广西高等学校科研基金资助项目(200I03YB004)
广西大学科研基金资助项目(XB2100099)
广西环境工程与保护评价重点实验室开放课题(桂科能0804K018)
广西研究生教育创新计划资助项目(105931003024)
南宁市科学研究与技术开发资助项目(201102093G)
