全文下载: 202103004.pdf
文章编号: 1672-6987(2021)03-0022-05; DOI: 10.16351/j.1672-6987.2021.03.004
王希桐, 杨庆昊, 王宇航, 张霞玲, 吴涵, 王孟琦, 周贵忠*(青岛科技大学 环境与安全工程学院,山东 青岛 266042)
摘要: 从青岛市市南区栈桥海滩采集的底泥和水生植物中获得微生物进行驯化研究,以期筛选出高效降解纤维素的耐盐型菌株并应用于含纤维素高盐度废水的处理中。使用盐度为3%的含纤维素模拟废水对微生物进行梯度驯化,CODCr去除率最高达624%。运用选择性培养基和刚果红染色法对菌株进行初步筛选、DNS法测定FPA酶活进行复筛后,得到4株具有良好处理效果的耐盐型产纤维素菌株。4株菌株在30 ℃,pH=7的外界环境条件下生长良好,其FPA酶活分别为0047,0052,0065,0120 U·mL-1。
关键词: 耐盐菌; 降解纤维素; 刚果红染色法; DNS法
中图分类号: X 703文献标志码: A
引用格式: 王希桐, 杨庆昊, 王宇航, 等. 耐盐型纤维素酶产生菌的驯化与筛选[J]. 青岛科技大学学报(自然科学版), 2021, 42(3): 22-26.
WANG Xitong, YANG Qinghao, WANG Yuhang, et al. Domestication and screening of salt-tolerant cellulase producing bacteria[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2021, 42(3): 22-26.
Domestication and Screening of Salt-tolerant Cellulase Producing Bacteria
WANG Xitong, YANG Qinghao, WANG Yuhang, ZHANG Xialing,
WU Han, WANG Mengqi, ZHOU Guizhong
(College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: In this dissertation, microorganisms were obtained from substrate sludge and aquatic plants collected from Zhanqiao Beach, Shinan District, Qingdao City for domestication studies, with a view to screening out salt-tolerant strains that efficiently degrade cellulose and apply them to the treatment of cellulose-containing high-salinity wastewater. They were acclimated using a cellulose-containing simulated wastewater gradient with a salinity of 3%, and the CODCr removal rate was as high as 624%. After preliminary screening of the strains with selective medium and Congo red staining method, and rescreening of FPA enzyme activity by DNS method, 4 strains of salt-tolerant cellulose-producing strains with good treatment effect were obtained. The four strains grew well at 30 ℃, pH=7, and their FPA enzyme activities were 0047,0052,0065 and 0120 U·mL-1.
Key words: salt-tolerant bacteria; cellulose degradation; Congo red dyeing method; DNS
收稿日期: 2020-06-04
基金项目: 山东省自然科学基金项目(ZR2018LB034);青岛科技大学大学生创新创业训练计划项目(2019).
作者简介: 王希桐(1995—),男,硕士研究生.*通信联系人.