ANAEROBIC DIGESTION TREATMENT OF ORGANIC SEWAGE

摘要

PURPOSE:To keep the low-temp. methane bacteria as the dominant species, to enable the activity to be kept even at low temp. and to perform sufficiently the energy recovery by adding bacteriophage for middle-temp. methane bacteria to the sludge treating an organic sewage. CONSTITUTION:In case of performing the methane fermentation by introducing an organic sewage into an anaerobic digestion vessel of the temp.-nonregulation, bacteriophage for middle-temp. methane bacteria is added in the above- mentioned anaerobic digestion treating vessel and the middle-temp. methane bacteria are selectively sterilized by the bacteriolysis action and the low-temp. methane bacteria are always kept in the system as the dominant species. Thereby the activity can be kept even at low temp. and the energy recovery can be sufficiently performed and also the treatment of the low-concn. organic sewage can be performed.