Method for high concentration culture of nitrifying bacteria or denitrifying bacteria contained in activated sludge, culture promoting agent used for high concentration culture method of nitrifying bacteria and method for reducing the amount of activated sludge

摘要

The activated sludge is a high concentration of nitrifying bacteria in activated sludge such as sewage sludge and manure sludge, and activated sludge is treated as sludge dewatering filter and digestion release liquid for about 1 to 2 months under the conditions of 2 to 4 mg / liter of dissolved oxygen, pH 7.5 ~ 8.5 and temperature The concentration of ammonia in the acidification process of the ammonia concentration is 100 to 300 mg / liter The nitrifying bacteria included in activated sludge are accumulated and accumulated by maintaining. Thus, a method of cultivating nitrifying bacteria contained in the activated sludge in a large amount and at a high concentration can be provided.