两步法混合培养保加利亚乳杆菌和嗜热链球菌提取重金属的强化作用。
Enhanced extraction of heavy metals in the two-step process with the mixed culture of Lactobacillus bulgaricus and Streptococcus thermophilus.
机构信息
Division of Applied Sciences, College of Environmental Technology, Graduate School of Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Hokkaido, Japan.
出版信息
Bioresour Technol. 2012 Jan;103(1):477-80. doi: 10.1016/j.biortech.2011.09.059. Epub 2011 Sep 20.
For biological extraction of heavy metals from chromated copper arsenate (CCA) treated wood, different bacteria were investigated. The extraction rates of heavy metals using Lactobacillusbulgaricus and Streptococcusthermophilus were highest. The chemical extraction rates were depended on the amounts of pyruvic acid and lactic acid. Especially, the extraction rates using mixed pyruvic acid and lactic acid were increased compared to those of sole one. They were also enhanced in the mixed culture of L. bulgaricus and S. thermophilus. To improve the extraction of CCA, a two-step processing procedure with the mixed culture of L. bulgaricus and S. thermophilus was conducted. A maximum of 93% of copper, 86.5% of chromium, and 97.8% of arsenic were extracted after 4 days. These results suggest that a two-step process with the mixed culture of L. bulgaricus and S. thermophilus is most effective to extract heavy metals from CCA treated wood.
为了从铬酸铜砷酸处理过的木材中生物提取重金属，研究了不同的细菌。使用保加利亚乳杆菌和嗜热链球菌提取重金属的提取率最高。化学提取率取决于丙酮酸和乳酸的含量。特别是，与单独使用一种酸相比，使用混合丙酮酸和乳酸的提取率有所提高。在保加利亚乳杆菌和嗜热链球菌的混合培养物中，提取率也得到了提高。为了提高 CCA 的提取率，采用保加利亚乳杆菌和嗜热链球菌混合培养物进行了两步处理程序。经过 4 天，铜的提取率最高为 93%，铬的提取率为 86.5%，砷的提取率为 97.8%。这些结果表明，使用保加利亚乳杆菌和嗜热链球菌的混合培养物进行两步处理程序是从 CCA 处理过的木材中提取重金属最有效的方法。
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