不同酵母菌组合处理含油废水的效能及酵母菌群落结构研究

Efficiency and Yeast Community Structure of Oil-Containing Wastewater Treatment System Inoculated by Different Yeast Strains Complex

对10株酵母菌菌株进行优化分组,在小型SBR反应器中探讨了不同组合酵母菌处理高含油废水的效果及其对系统稳定性的影响,并利用PCR-DGGE技术解析了不同系统的酵母群落结构.结果表明,由O2、G1、W1构成的组合在效能和稳定性方面明显优于其他组合,缺乏3株菌的组合不能形成高效、稳定的废水处理系统;O4、G2等菌株是导致系统上清液混浊的主要原因,并在系统运行中逐步被淘汰;不同优势菌株在沉降酵母中的分层不同,在停止曝气后G1首先沉降到底层,O2或W1则均匀分布.

Ten yeast stains were grouped and applied in pilot-scale sequencing batch reactors to treat oil-containing wastewater. The efficiency and stability of different reactors were discussed and yeast community structure was investigated by PCR-DGGE method. The results show： the group consisting of 02, G1 and W1 is markedly superior to others in efficiency and stability respects; the group absence of these 3 stains fails to form a system with high efficiency and good stability; 04 and G2 strains lead to turbid supernatant fluid and are eliminated from system step by step; the distribution of yeast ceils in settlement sludge varies with different stains. When aeration is stopped, G1 deposits into lower layer but 02 or W1 distributes evenly.