| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve the volume reduction of surplus sludge and the improvement in the quality of treated water. <P>SOLUTION: A biological treatment tank 1 is structured to have three layers, namely an aerobic area A, a facultative anaerobic area B and an anaerobic area C, arranged from top to bottom, thereby enabling decomposition of all biodegradable organic substances in organic wastewater, introduced into the tank 1, according to the three layers A, B, and C, and enabling cooperation of microorganisms different in property to achieve the volume reduction of surplus sludge and the improvement of the quality of treated water. The organic wastewater is introduced into the biological treatment tank 1 from its bottom through an organic wastewater introduction part 6, which supplies the organic substances sufficiently to anaerobic sludge on the bottom to sufficiently maintain the activity of the anaerobic sludge, thereby maintaining the anaerobic area C to maintain the three layers A, B, and C. As a result, further a volume reduction of the surplus sludge and improvement of the quality of the treated water can be achieved. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
