Qu Yan-Zhi, Liu Cao, Liao Ri-Hong, Yao Lei, Ye Zheng-Fang, Wang Pei-Jing
Department of Environmental Engineering, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China.
Huan Jing Ke Xue. 2009 Nov;30(11):3306-10.
The effect of immobilized microorganism technique on the micro-polluted river water was studied by four kinds of gaia-biological aerated filter (G-BAF), which were formed by special microorganism (BP35) and four different carriers, including haydite, FPUFS, aquamats flexible carrier and artificial aquatic mat. The removal rates of NH4(+) -N, chlorophyll and turbidity were 83.0%-89.0%, 77.5%-89.0% and 84.4%-95.2%, respectively, and they were all higher than the removal rates of COD, UV254 and TP. The FPUFS contained reactive groups, such as hydroxyl, epoxy and acylamide groups, which made FPUFS load a great amount of enzymes and microorganisms. Therefore, the removal rates of pollutants for FPUFS-G-BAF were higher than those for the other three kinds of G-BAF. Hydraulic retention time (HRT) had little effect on the removal rate of NH4(+) -N, while affected the removal rate of COD significantly. When the concentration of dissolved oxygen (DO) increased from < 2 mg/L to > 4 mg/L, for the four kinds of G-BAF, the removal rates of COD and NH4(+) -N increased 11.9%-18.0% and 12.7%-16.1%, respectively. The result of GC-MS showed that the technique of G-BAF could effectively degrade the macro-molecule refractory organics into small-molecule substance.
采用四种由特殊微生物（BP35）与四种不同载体（陶粒、FPUFS、软性组合填料和人工水草）构成的盖亚生物曝气滤池（G-BAF），研究了固定化微生物技术对微污染河水的处理效果。NH4(+) -N、叶绿素和浊度的去除率分别为83.0% - 89.0%、77.5% - 89.0%和84.4% - 95.2%，均高于COD、UV254和TP的去除率。FPUFS含有羟基、环氧基和酰胺基等活性基团，使得FPUFS负载了大量的酶和微生物。因此，FPUFS-G-BAF对污染物的去除率高于其他三种G-BAF。水力停留时间（HRT）对NH4(+) -N的去除率影响较小，而对COD的去除率影响显著。当溶解氧（DO）浓度从<2 mg/L增加到>4 mg/L时，对于四种G-BAF，COD和NH4(+) -N的去除率分别提高了11.9% - 18.0%和12.7% - 16.1%。GC-MS结果表明，G-BAF技术可有效将大分子难降解有机物降解为小分子物质。
