特殊産業廃水の微生物処理に関する研究 : (第6報)フェノール樹脂工場廃水の処理

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An activated sludge method for wastes containing phenol and formaldehyde discharged from industrial phenolic resin factories was studied. To treat them economically, the treatment of the original waste was compared with that of pretreated waste in 500 ml flasks and 2 l continuous desk units.It was felt from the results that the more formaldehyde was eliminated at the beginning by chemical methods, the more stable and economically the waste was treated by the activated sludge method. If the concentration of formaldehyde was high it, was better to add nitrate as the nutrient source of nitrogen rather than ammonium salts. BOD or COD load was 2〜4kg/m^3/day; removal rate was more than 99% of BOD or less than 80% of COD. Formaldehyde and phenol in pretreated waste were more than 99% removed. It was necessary to dilute the waste. If the dilution fold was too low, it was untreatable since the sludge was so poor on setting and foamed so extremely in aeration that it overflowed from the settling vessel and decreased.
社団法人日本生物工学会の論文