生态环境学报2017，Vol.26Issue(10)：1768-1775,8.DOI:10.16258/j.cnki.1674-5906.2017.10.017
小分子有机物对自养型氧化硫硫杆菌与异养型胶红酵母菌共培养的影响
Effects of Low-molecular Organics on the Co-culture of Acidithiobacillus thiooxidans and Rhodotorula mucilaginosa
摘要
Abstract
Acidithiobacillus thiooxidansis the major microorganism in sludge bioleaching. The low-molecular organics in activated sludgewhichcan be absorbed and degraded byRhodotorula mucilaginosahave negative effects onthe growth ofAcidithiobacillus thiooxidans. In order to find the new methods to accelerate bioleaching processes and shorten bioleaching period, theeffects of low-molecular organics on co-cultivation of Acidithiobacillus thiooxidans and Rhodotorula mucilaginosa were studied. In this research, the effects of this co-cultivation formula were studied through the comparative experiments of composite system of Acidithiobacillus thiooxidans andRhodotorula mucilaginosaas well as single system ofAcidithiobacillus thiooxidanswhich cultivated in different circumstances of acetic acid, propionic acid, citric acid, oxalic acid and humic acid, respectively. The result indicated that all the low-molecular organics listed above had negative effects on sulfur-oxidation ofAcidithiobacillus thiooxidans. Furthermore, the effect intensities of different treatments were ranked as follows: acetic acid>propionic acid>humic acid>oxalic acid>citric acid. However, the effect was gradually reduced in the later stage of bioleaching. In earlier stage of treatment, sulfur-oxidation ofAcidithiobacillus thiooxidansof composite system was greater than that of single system. whereas, in later stage of treatment, the gap between composite system and single system decreased gradually. And, sulfur-oxidation ofAcidithiobacillus thiooxidans of single system was much better than that of composite system, separately. Thus, to a certain extent the co-cultivation of Acidithiobacillus thiooxidansand Rhodotorula mucilaginosa could effectively accelerate the bioleaching process, shorten leaching period, improve leaching efficiency and be highly prospective in sewage sludge bioleaching practices.关键词
生物淋滤/氧化硫硫杆菌/胶红酵母菌/小分子有机物/共培养Key words
bioleaching/Acidithiobacillus thiooxidans/Rhodotorula mucilaginosa/low-molecular organics/co-culture分类
资源环境引用本文复制引用
杨期勇,杨文锋,朱琼,张庆芳,刘艺奇,唐梅,谭婵娟..小分子有机物对自养型氧化硫硫杆菌与异养型胶红酵母菌共培养的影响[J].生态环境学报,2017,26(10):1768-1775,8.基金项目
国家自然科学基金项目(21367014) （21367014）
江西省自然科学基金项目(20151BAB203026) （20151BAB203026）
江西省教育厅科技项目(GJJ14732) （GJJ14732）
