Liquid purification or separation – With gas-liquid surface contact means
Reexamination Certificate
1999-06-04
2001-05-01
Upton, Christopher (Department: 1724)
Liquid purification or separation
With gas-liquid surface contact means
C210S194000, C210S196000, C210S197000, C210S615000
Reexamination Certificate
active
06224756
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an apparatus for treating organic raw water utilizing anaerobic microorganisms and more particularly to an apparatus for treating raw water contained organic matter, or the like such as, living drainage, factory drainage, etc., by utilizing anaerobic microorganisms.
2. Prior Art
Japanese patent application No. 9-199208 (see counterpart U.S. Pat. No. 5,972,212) by the applicant relates to an apparatus of the type in which raw water is treated in circulation by aeration, and by aerobic microorganisms.
Also, known is an apparatus that eliminates, in the same treating times as usual with an activated silt method, bio-chemically nitrogen, phosphorus, etc. of raw water, by making higher the density of germs, by inserting in a bioreaction tank spherical or foamed cubic carriers for rooting microorganisms thereto.
The apparatus shown in Japanese patent application No. 9-199208 uses air and it cannot apply to a case where anaerobic microorganisms are used.
Spherical or foamed carriers become considerable in numbers, and it is very troublesome to treat same by washing or replacing.
SUMMARY OF THE INVENTION
It is an object of the present invention to offer an apparatus for treating organic raw water utilizing anaerobic microorganisms to resolve these problems.
An apparatus for treating organic raw water utilizing anaerobic microorganism of the present invention comprises a casing and a carrier assembly.
The casing is a vertical type and has a main body, a bottom wall and a ceiling. The casing is open and an inflow port for raw water is provided at the upper portion thereof and an outflow port for the treated water is provided at the lower portion thereof.
The carrier assembly is assembled, by piling plural carrier discs of porous polyethylene for rooting anaerobic microorganisms inclusively therein, with each space between every two carrier discs. Liquid passages provided evenly all over each disc through thereof do not overlap vertically with each other. The carrier assembly is disposed in the casing so that the carrier assembly prevents direct leading of the water to be treated from the inflow port to the outflow port.
The casing is preferably cylindrical, but it may be angulate. The inflow of raw water may be naturally by head or under pressure by pump. The outflow ports are open at the lower portion than the lower end plane of the carrier assembly. If desired the bottom plate and the ceiling wall can be arranged so as to be removed from the casing, so that the carrier assembly is easily inserted in and removed from the casing.
The material of the carrier disc is the same as adopted in the apparatus of Japanese patent application No. 9-199208 and is high density polyethylene now on sale under the article name [POLEX] (the trade mark of TECHNOLOGIES CO., LTD. of Japan)
The number of the carrier discs is determined according to properties of the raw water.
Preferably, said casing has an outflow port for the treated water above said inflow port, said outflow port connects with a circuit and said circuit connects by means of a pump with a circulating water supply port which is open within said casing between levels of said inflow port and said outflow port.
This construction has no fear of raw water being taken out without being treated and also the treated water which is fed in the casing flows out as it is through the outflow port. Accordingly, the water being treated turns in some numbers and is purified, after which it is taken out through the outflow port.
Also, as the outflow passage is not disposed under the lower portion of the casing, it does not need the space and it is not necessary to open an outflow port through the casing. The outflow port may be an opening itself at the lower end of the outflow passage.
Preferably, said outflow port passes in said casing through orifices which are perforated radially above said outflow port through a circular wall coaxially installed in said casing.
Raw water does not flow directly to the orifice, and from the outflow port only purified water is taken out.
Preferably, a part of said circuit is an outflow passage formed on the axial line of said carrier assembly, and an opening at the lower end of said outflow passage is said outflow port.
Preferably, said outflow passage is the continuation of axial holes of central spacers each of which is fitted, to form a space between two carrier discs, in a hole perforated on the axial line of said carrier disc.
By connecting a plurality of said central spacers with each other, and by fitting them in said axial hole of said carrier disc, the axial holes of these central spacers form in a series a passage and an outflow passage that can be formed without another pipe.
Preferably, said outflow port passes in an alternative way by a changeover valve to a drain and a circuit.
When raw water is desired to be treated at one time, the outflow port is connected to the drain. In this case, the treated water may flow down naturally or may be positively drained by arranging a pump between the outflow port and the drain.
When it is necessary to treat raw water repeatedly, the outflow port is connected to the circuit and positively flowed in the by use of a pump. Accordingly, it can easily be fitted with the property of raw water.
Preferably, said carrier assembly comprises support frames, said carrier discs and outer spacers, said support frames and said carrier discs being provided with holes for bolts on the same vertical lines, and with said carrier assembly being assembled, by piling carrier discs on said support frames by means of outer spacers, by passing said bolts through said holes and axial holes of said outer spacers, and by fastening nuts onto said bolts, and with said carrier assembly being settled by fixing said support frames to the arms of said casing.
When the carrier discs and the spacers increase in number, they are made into one body by fastening with bolts and nuts on the support frames.
Preferably, said support frame comprises a boss, arms, frames and a central support ring, said. The boss has a hole fitting with said axial hole of said central spacer, said arms protruding radially from said boss, said frames being spanned between the end portions of said arms and perforated with said holes, said central support ring having an inner diameter larger than said hole, fitting with outer diameter of said central spacer and being set to said arms at one end of said boss concentrically therewith.
The arms and frames are used for supporting the carrier discs.
Preferably, said frames have at one ends of said holes outer support rings for closely receiving said outer spacers.
The outer spacers are supported stably in the outer support rings.
Preferably, said carrier disc is formed, connecting outer units circularly around an outer circumference of a regular hexagonal object with H-shaped rails and corner spacers, each of said outer units being the shape enclosed with lines which are a line of said regular hexagonal object, radiative lines from the center of each end of said line of said regular hexagonal body and a circular arc of said casing cut off by said radiative lines.
In case an area of the carrier disc is large, as it can be formed, by connecting the regular hexagonal body and the outer unit by means of H-shaped rails and the corner spacers, it becomes a matter easily to deal with. The corner spacers are used for connecting the H-shaped rails with each other and regulate spaces between each two carrier discs.
Preferably, regular hexagonal body is formed, by connecting plural regular hexagonal units in a honeycomb fashion with each other and also in the empty portions in the outer circumference rhombic segments with the neighboring regular hexagonal units by means of said H-shaped rails, corner spacers and intermediate spacers.
It is suitable for a casing of large sectional area. The intermediate spacer is used, located at each top of the regular hexagonal unit and the rhombic segment, for connecting the H
Hongo Company Ltd.
Lackenbach Siegel Marzullo Aronson & Greenspan
Upton Christopher
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