聚磷菌及污水强化生物除磷的研究进展

本文介绍了聚磷茵的微生物学、分子生物学,就分子生物学技术推动聚磷菌种群的研究做一探讨.阐述了污水强化生物除磷机理及工艺上的研究进展,展望了今后的重点研究方向.     

大连大学生活污水生物脱氮的实验研究

采用改进的生物接触氧化法对大连大学生活污水进行生物脱氮研究.该工艺结合内回流和生物膜的特点,实现了同步硝化反硝化作用,提高了反应器对各种水质水量的适应性.实验结果表明,改进后的生物接触氧化反应器在不影响去除有机物的情况下,对总氮的去除率提高了约14.7%,对氨氮的去除率提高了25.7%以上,并且不用外加碳源进行反硝化,也不用加碱进行硝化.     

一体式生物膜反应器生物强化反硝化研究

在反应器挂膜启动阶段和运行阶段投加好氧反硝化菌纯培养物,进行生物强化反硝化研究。结果表明,在反应器启动过程中投加好氧反硝化菌,可缩短系统的启动时间;在反应器运行过程中间歇投加好氧反硝化菌能提高系统对污染物的去除效果,同时可增强系统处理的稳定性。     

Performance of biological phosphorus removal and characteristics of microbial community in the oxic-settling-anaerobic process by FISH analysis

Performance of biological phosphorus removal in the oxic-settling-anaerobic （OSA） process was investigated. Cell staining and fluorescent in situ hybridization （FISH） were used to analyze characteristics and microbial community of sludge. Experimental results showed that phosphorus removal efficiency was near 60% and the amount of biological phosphorus accumulation in aerobic sludge of the OSA system was up to 26.9 mg/g. Biological phosphorus removal efficiency was partially inhibited by carbon sources in the continuous OSA system. Contrasted to the OSA system, biological phosphorus removal efficiency was enhanced by 14% and the average total phosphorus （TP） contents of aerobic sludge were increased by 0.36 mg/g when sufficient carbon sources were supplied in batch experiments. Staining methods indicated that about 35% of microorganisms had typical characteristics of phosphorus accumulating organisms （PAOs）. FISH analysis demonstrated that PAOMIX-binding bacteria were predominant microbial communities in the OSA system, which accounted for around 28% of total bacteria.