高浓度含铬(Ⅵ)污染物的微生物培养条件及解毒特性

环境污染物的生物降解具有高效、低成本等优势，但高浓度六价铬污染物对微生物有抑制作用.探讨了微生物解毒六价铬的效果，并优化微生物赖以生存的培养基组成，得到微生物适宜的组分构成.经厌氧条件与兼性条件的对比实验，确定了微生物解毒的外部环境.测定微生物生长曲线，得到该种微生物的对数生长期在2 d左右，为微生物的快速解毒提供了理论基础.强化微生物对高浓度Cr⁶⁺的解毒效果，对于200 mg/L以下Cr⁶⁺污染物微生物解毒完全.对于高浓度的Cr⁶⁺污染物效果也明显,Cr⁶⁺含量600 mg/L经过5 d后可降至82 mg/L.

Culture Condition and Detoxification Characteristic of Microorganisms in High-Chromium(Ⅵ) Pollutant

Biodegradation of environmental pollutants has the advantages of high effect and low cost,but high concentration chromium(Ⅵ) can restrain microorganism.The detoxification effect of microbe is discussed and the constitutes of culture medium are optimized to fit for microorganism detoxification in high-chromium pollutants.The exterior environment of microorganism is provided between anaerobic and aerobic condition,which takes advantage over industry application.The logarithm growth curve of microbe is determined and its growth period is two days,which provides the theoretical base of quick detoxification.Finally consolidation detoxification of microbe is studied and results show that the microbe can effectively remove low concentration chromium(Ⅵ) (below 200 mg/L) and reduce high concentration from 600 mg/L to 82 mg/L over five days.