耐酸性酵母菌筛选及强化污泥生物沥浸预处理研究  

Screening of an Acid-resistant Yeast Strain for Enhancement of Sludge Bioleaching Pretreatment

作　　者：覃海光 张军[1,2,3] 鲍雨[1,2,3] 王敦球 张华[1,2,3] 孙晓杰[1,2,3] QIN Hai-guang;ZHANG Jun;BAO Yu;WANG Dun-qiu;ZHANG Hua;SUN Xiao-jie(College of Environmental Science and Engineering,Guilin University of Technology Guilin 541004,China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Water Polution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [3]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004

出　　处：《中国给水排水》2022年第9期94-99,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51868011、51638006);广西科技重大专项(桂科AA18118013);广西自然科学基金资助创新研究团队项目(2018GXNSFGA281001);“广西特聘专家”专项经费资助项目。

摘　　要：针对水溶性有机物对硫杆菌的毒害作用导致生物沥浸效率降低的问题,开展了耐酸性酵母菌生理生化特性研究,并验证了其强化污泥生物沥浸预处理的可行性。结果表明,菌株BJ-1属于红酵母菌属,其适宜的温度和pH范围分别为28~30℃和3.0~7.0,说明酵母菌BJ-1为中温耐酸性菌。当酵母菌BJ-1初始接入浓度为1×10^(6)个/mL时,能够较好地加速生物沥浸进程,并使沥浸污泥的脱水性能提升5~6倍,经过其处理后污泥的沉降率提高3.1倍,毛细吸水时间缩短51%,污泥比阻降至1.0×10^(12) m/kg以下。脱水效果最佳时间是沥浸2 d。The toxic effect of water-soluble organic compounds on Thiobacillus leads to the decrease of its bioleaching efficiency.The physiological and biochemical characteristics of the acid-resistant yeast were investigated,and its feasibility for enhancing the bioleaching pretreatment of sludge was verified.The strain BJ-1 belongs to Erythemyces,and its suitable temperature and pH range were 28-30℃and 3.0-7.0,respectively,indicating that yeast BJ-1 is a moderate temperature and acid-resistant bacterium.When the initial concentration of yeast BJ-1 was 1×10^(6) CFU/mL,the bioleaching process could be accelerated,and the dewatering performance of the leached sludge could be improved by 5-6 times.After the treatment,the sedimentation rate of the sludge increased by 3.1 times,the capillary suction time was shortened by 51%,and the sludge specific resistance decreased to less than 1.0×10^(12) m/kg.The best dewatering performance was obtained when the leaching time was 2 days.

关 键 词：耐酸性酵母菌 生物沥浸 城市污泥 脱水 

分 类 号：TU992[建筑科学—市政工程]