微生物担持アルミナ多孔体の有機物除去能に及ぼす微細構造および微生物叢の影響

抄録

The effect of the microstructure of a microorganism-supported alumina porous body on the organic matter removal ability in water was investigated. Alumina porous bodies with different pore diameters and pore volumes were prepared by changing the particle size and addition ratio of pore-forming agents. Microorganisms were supported by immersing the porous alumina body in a culture solution containing yeast, lactic-acid bacilli and bacillus natto, or activated sludge for 5 days, and the effect of the kind of microorganism species supported on the porous alumina body on the organic matter removal ability was also investigated. The organic matter removal ability was evaluated by immersing the microorganism-supported porous alumina in model sewage containing glycine and glucose so that the initial COD value was 180 ppm, and measuring the change in the COD value. It was found that the COD decreasing ratio was not affected by the pore size of the alumina porous body regardless of the microbial species, but it increased with increasing pore volume. In addition, it was also confirmed that the COD decreasing ratio was higher when the microorganisms derived from activated sludge were supported than the microorganisms derived from the culture solution.