| 摘要 |
<p>PURPOSE:To decolor water having the color of raw sewage by carrying out integrated culture with water obtd. by treating raw sewage as a tracing source and a culture ground contg. water having the color of raw sewage, adding agar to the ground, carrying out screening culture, inoculating the resulting colony into a similar culture ground, carrying out shaking culture and treating the water having the color of raw sewage with the resulting two or more kinds of strains which are very effective in color separation of the color of raw sewage. CONSTITUTION:Integrated culture is carried out with soil, activated sludge or water obtd. by treating raw sewage as a tracing source and a culture ground consisting of water having the color of raw sewage, an extract of yeast, MgSO4.7H2O, KH2PO4 and NH4Cl. Agar is then added to the ground and screening culture is carried out. A colony formed on the agar is inoculated into a similar culture ground and shaking culture is carried out. Yellowish brown water obtd. by treating raw sewage is treated with basidiomycete and bacterium strains having >=15% rate of color separation of the color of raw sewage selected among the resulting strains. The yellowish brown water can be decolored at a low cost by the action of microorganisms in place of the conventional physicochemical method using ozone and activated carbon.</p> |
