CAJ | 학술논문

　　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。
　　이Corynebacterium sp.NNC-3위수시균주，취초시세포밀도대분분강해반응적영향진행료연구。결과표명，초시분분농도위100～600 mg/L，초시세포밀도재0.05～0.30（ OD600）범위내시，수착초시세포밀도적증대，균주NNC-3강해분분적평균속솔신속증가；진일보증대초시세포밀도，균주NNC-3강해분분적속솔불재수초시세포밀도적증대이승고，균주NNC-3강해분분적능력추우포화상태；초시분분농도위600～800 mg/L시，균주NNC-3강해분분적능력추우포화상태，차분분적강해속솔정현축점하강추세，표명차시저물농도위균주NNC-3강해분분적한제성인소。연구성과대고효처리수분오염배경구유일정적삼고개치。
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 not the suppression factor of phenol biodegradation .The rate of strain NNC-3 biodegrading phenol was declined gradually at the initial phenol concentration of 600~800 mg/L.It was suggested that the substrate concentration was the suppression factor of phenol biodegrading by strain NNC -3 .All the results contributed to the biodegradation efficiency of phenol in contaminated environment .