Liquid purification or separation – Processes – Treatment by living organism
Patent
1997-06-13
2000-10-31
Hruskoci, Peter A.
Liquid purification or separation
Processes
Treatment by living organism
210744, 210747, 210758, 210807, 210 85, 210143, 210151, 210170, 210199, 2102421, 210253, 210255, 210258, C02F 174
Patent
active
061397458
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates to a purification apparatus and method for purifying directly the lakes and ponds in which the density of acid such as nitric and phosphoric due to gray water, animal uric acid sewage and sewage flowing into the lakes and ponds is adequately controlled.
In case of purifying the organic raw water in conventional systems a contact purification method uses biological films. Contact aeration process water treatment method is one of these purification methods. As for an actual implementation of contact aeration process water treatment method, what is well known conventionally is a multi-layered processing apparatus in which the processed water is forced to contact directly the contact media including aerobic microbes, and the purification process is achieved while the processed water running through the several multilayers developed from upstream to down stream. In an apparatus disclosed in Japanese Patent Open No. 62-74489 (1987), the contact aeration layer is buried under the ground apart from the polluted water site, and the multi-layered purification system is made not to be found on the ground.
As for other contact purification methods, what is often used is the submerged filter contact purification method, in which biological films are adhered on the filter media and the raw water is led to the filter media. In this method, two sub categories exist; in the fixed bed method, the contact media to which biological films adhere are fixed as the submerged filters, and on the other hand, in the fluidized bed method, the contact media with its specific gravity defined relatively larger than the specific gravity of water, for example, about 1.2, may be allowed to move freely in the processed water. As for the later category, the fluidized bed method, as disclosed in Japanese Patent Open No. 1-218691 (1990), there is such an example that the raw water with very high impurity density is purified by using the fluidized bed contact purification method accompanying with fresh air exposure. And as disclosed in Japanese Patent Open No. 6-99185 (1995), there is such an example that the raw water is purified by supplying the processed water mixed with the fresh air into the fluidized bed buries under ground.
If the purification facility is constructed in the shore or surrounding area of the lakes and ponds, and conventional purification method usually used in the sewage water treatment plant and/or the water purification plant is applied, a large amount of energy is required in addition to the minimum amount of energy to operate the purification facility. This is because the pressure loss occurs for transporting the raw water from the water intake port to the water treatment plant and because the pump work is required for transporting the raw water from the lake water level to the higher water level in which the water purification plant exists. In selecting the building site for the purification plant, a relatively small-scale sewage system can be built under ground. However, for purifying the lake and pond waters, it is required to treat larger amount of waters with lower impurity density than the sewage water treatment plant does. For the purification of lakes and ponds, the size of the sewage system becomes larger and it is difficult to locate the sewage system in the underground site, and therefore, there is such a problem that a building site for the purification facility can not be always selected to be at an optimal place.
If the sewage system is installed underground and the aeration process is required for injecting the chemical materials into the raw waters, there is not any sufficient way for preventing completely the flow-out of the filter media outside the facility to the lake waters.
An object of the present invention is to provide a purification apparatus operable with lower power.
Another object of the present invention is to provide a purification apparatus with which newly added systems can be integrated if necessary.
Yet another obje
REFERENCES:
patent: 444007 (1891-01-01), Monjeau
patent: 763325 (1904-06-01), Roche
patent: 4422929 (1983-12-01), Owens
patent: 4565627 (1986-01-01), Lagstrom et al.
patent: 4582609 (1986-04-01), Hunter et al.
patent: 4659462 (1987-04-01), Chapman
patent: 5228998 (1993-07-01), DiClemente et al.
patent: 5486291 (1996-01-01), Todd et al.
Kobayashi Jun'ichi
Kobayashi Kazuo
Mizumori Takashi
Takagi Takeo
Tsuzuki Koichi
Hitachi , Ltd.
Hruskoci Peter A.
LandOfFree
Purification apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Purification apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2047532