| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electrolytic phosphorus recovery device which is excellent in resource conservation and excellent as a measure against global warming, and enables reuse of phosphorus resources, and a sewage treatment system using the device. <P>SOLUTION: The sewage treatment system comprises a wastewater treatment facility 1 for cleaning inflow sewage using at least activated sludge, a sludge treatment facility 2 for dewatering and drying surplus sludge discharged from the wastewater treatment facility to separate it into concentrated sludge and desorbed water, the electrolytic phosphorus recovery device 3 for recovering phosphorus components in the desorbed water discharged from the sludge treatment facility, a solar cell 4 for generating electricity using sunlight, a hydrogen gas recovery device 5 for recovering hydrogen gas generated from the electrolytic phosphorus recovery device 3, a hydrogen battery 6 for generating electricity using the hydrogen gas recovered in the hydrogen gas recovery device as a fuel, and a power source switching device 7. A direct-current power source for electrolysis, applied to the electrolytic phosphorus recovery device 3 can be switched to either the solar cell 4 or the hydrogen battery 6 by the power source switching device 7. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
