| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently treat suspended organic matter and sludge by ultra-atomization to greatly improve sewage treatment capacity. <P>SOLUTION: A sewage treatment system 1 has a first ultra-atomizer 20 which supplies sewage from a storage tank 13 receiving the supply of night soil-containing sewage and fermentative bacteria, to a ring passage at a high speed of≥8 m/sec by a high-pressure pump, and ultra-atomizes water clusters and contained organic matter to a micron level by at least shearing action of a high-speed water flow to return them to the storage tank, a sedimentation tank 15 which receives the ultra-atomized intermediate sewage to separate it into supernatant water and sludge, a posttreatment part 16 which receives the supply of the supernatant water, and discharges it after coagulation and pH adjustment treatment, a sludge thickener 17 which receives the supply of fluid sludge and the fermentative bacteria from the sedimentation tank to separate them into supernatant water and settled sludge, a second ultra-atomizer 20 which has the same structure as the first ultra-atomizer, and ultra-atomizes the separated sludge to return it to the sludge thickener, and a biological treatment part 40 which returns the separated supernatant water to the posttreatment part, and subjects the settled sludge from the sludge thickener to biological treatment. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
