To provide a simple volume reduction method of sludge for efficiently solubilizing the sludge, a method for easily realizing the domination of a bacteria group mainly comprising Bacillus, and an excellent organic wastewater treatment method using the above domination.
In the volume reduction method of sludge, the method for causing the bacteria group mainly comprising Bacillus to dominate, and the organic wastewater treatment method using the dominating method, cavitation is generated in sludge fluid containing microorganisms by jetting the sludge fluid from an opening at a high speed to solubilize the microorganisms. Two or more cycles of the above jetting is carried out in the spout port and discharge port of the above fluid and a cavitation generation chamber installed between the ports, and a sludge solubilizing device installed inside of the cavitation generation chamber and having an air supply hole. Air is not supplied from the air supply hole during the first cycle, and air is supplied during the last cycle.
COPYRIGHT: (C)2007,JPO&INPIT
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Tsutomu Tsuruta
Normal English
Shoji Kakizawa
Kenji Suzuki
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