不同载体材料对厌氧氨氧化效果影响的研究

文章分别采用水性聚氨酯(WPU)和活性炭2种材料作为生物载体,在2个不同的上流式厌氧污泥床(UASB)反应器中接种包埋污泥和生物活性炭,采用人工配水进行连续实验,观测厌氧氨氧化反应器启动过程中各种含氮化合物的变化,以考察不同载体材料对厌氧氨氧化过程的影响。文章在生物活性炭反应器中成功驯化了采自污水处理厂的普通厌氧污泥,证明了从环境中驯化培养厌氧氨氧化菌的可能性。通过2个阶段中脱氮效率的比较,发现以水性聚氨酯包埋材料作为未驯化细菌载体并无明显优势,反而成为传质的障碍;而采用生物活性炭则可以迅速达到提高局部生物量、聚集功能菌、屏蔽不利环境的干扰等作用,是理想的微生物载体。

Effect of Different Carriers on Anaerobic Ammonium Oxidation Process

To investigate the effect of different carriers on process of anaerobic ammonia oxidation,two types of materials including water-bone polyurethane(WPU) and activated carbon,were used for microbial immobilization in two different UASB reactors.The synthetic wastewater containing ammonia and nitrite was applied as raw water and variation of nitrogen compounds was analyzed.The study verified the possibility of domesticating anaerobic ammonium oxidation bacteria from the environment in biological activated carbon(BAC) system.The comparison of nitrogen removal efficiency in different running stages indicated that the immobilized sludge had no distinct advantage in reactor start-up as it might have become the obstacle of mass transfer,while the activated carbon proved to be an ideal microbial carrier due to synergistic effect of contaminant adsorption,bacterial aggregation and microbial degradation,combined with its protection of microorganisms from deleterious surroundings.