| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sewage treatment method in which organic sludge is dissolved thermally before carrying out a step of treating sewage with a microbe to facilitate the decomposition of the dissolved organic sludge by the microbe and particularly organic sludge can be dissolved efficiently by easy temperature management. <P>SOLUTION: In a method for treating sewage microbiologically, when the fluidity of raw sewage is low, water is added to the raw sewage in an agitation tank to dilute the raw sewage so that the water-added sewage has about 10,000 ppm or lower BOD concentration and increase the fluidity thereof before the raw sewage is introduced into a boiling tank. The water-diluted sewage agitated in the agitation tank is introduced into the boiling tank to heat the introduced sewage and adjust the temperature of the heated sewage to 55-98°C. After the organic sludge in the boiling tank is solubilized, the boiled sewage is sent to a step of decomposing the boiled sewage by the microbe. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
