薬剤を用いる酵母処理槽の雑菌汚染防止 : 酵母による食品工業廃水の処理(第2報)

概要

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Various sterilizers and antibiotics were tested for their ability of inhibition of growth of yeasts and microorganisms existing in activated sludge. Among them, hypochlorite, sulfite and benzalkonium chloride showed strong inhibiting effects on the growht of protozoa and bacteria with low concentrations such as 20 ppm in the medium, whereas yeast could grow with higher concentrations of these reagents in the medium. Under aeration of suspensions of microoroganisms such as yeast and bacteia with added hypochlorite, available C1 decreased rapidly, while added SO_2 devreased hardly in the yeast cells suspension with aeration. Continuous treatment of model wastewater using yeast with such reagents as hypochlorite (10 mg/l/day), SO_2 (40 mg/l/day) and benzalkonium chlorde (25 mg/l/day), respectively, was examined. In every case, the yeast count in the yeast tank remained at about 10^8 cells/ml and COD values of model wastewater (1,200-2,000 ppm) were reduced to 200-300 ppm after treatment. The practical treatment of wastewater from a sake brewery using the yeast-activated sludge system showed that by adding 35 g of hyposhloric acid to one m^3-of wastewater in the yeast tank once in 2 days, the inoculated yeast grew well maintaining 10^8 cells/ml and a few bacteia and no protozoa were observed in the yeast tank.
社団法人日本生物工学会の論文
1980-05-25