| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that an aeration step, a sedimentation step, and a circulation step are included in the water quality purification using microorganism, aeration (increase in dissolved oxygen) is necessary for the aeration step, a step requiring the return of sedimentation sludge is necessary for the sedimentation step, similarly to the circulation step; these steps require power apparatuses and the operation cost, and the total cost thereof becomes very high if including noise-proof and vibration-isolating apparatuses, and the apparatus-saving and the functional improvement must be essential. <P>SOLUTION: A "gas-liquid pump" and a "gas-liquid separator" are installed in an aeration step for purifying the water quality. The two-phase gas-liquid flow to be pumped from the gas-liquid pump is separated into pressurized liquid and pressurized gas by the gas-liquid separator. The pressurized liquid is emitted into the aeration step as aerated water, and the pressurized gas is used for an air-lift pump for pumping up sludge in the sedimentation step to return the sludge, to carry out the sludge and to circulate water. An energy-saving and apparatus-saving device is provided, which simultaneously performing multiple functions of noise-less and vibration-less operation, aeration, return and carry-out of sludge, and circulation of nitrified water by one power of the gas-liquid pump. <P>COPYRIGHT: (C)2012,JPO&INPIT |
