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| Pelletized chromatography media of agarose, dextran or acrylamide/azlactone copolymer |
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Muddy and waste water treatment method
| Details |
Inventors: Hirose, Kaoru;
Assignee: Daiyo Kiko Industry, Inc. (Kochi, JP)
Primary Examiner: Hruskoci; Peter A.
Assistant Examiner:
Attorney, Agent or Firm: Berenato, III; Joseph W.
A water treatment method and device can perform a regeneration treatment of the muddy water once used in a water excavation work to decrease its specific gravity for reuse in the water excavation work, and a dehydration treatment of various waste waters such as muddy water from the water excavation work and industrial waste water for final disposal. The dehydration treatment includes a flocculating step for flocculating fine muddy particles, a solid-liquid separating step for separating the floccus to a solid part and a liquid part, a discharging step for discharging the liquid part through a filtering and water cleansing step, and a solid part treatment step for treating the solid part separated at the solid-liquid separating step, and the regeneration treatment including a solid-liquid separating step for separating the muddy water to a solid part and a liquid part and a reusing step for reusing the separated liquid part which is free from the muddy particles by the solid-liquid separating step, and a solid part treatment step for treating the solid part separated at the solid-liquid separating step. The solid-liquid separating step is achieved by a centrifugal separator whose inner basket is composed of a non-perforated wall and a wheel shaped bottom. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG.
1, there is one embodiment shown of the muddy and waste water treatment method according to the present invention.
This drawing shows two treatment systems, one of which is a dehydration treatment to decrease the water content or dehydrate muddy waste water from water excavation works and industrial waste water for final disposal, and the other is a regeneration treatment to lower the specific gravity of the muddy water once used in the water excavation works for reuse in the same or other water excavation works.
The dehydration treatment system includes a first reservoir 1a in which muddy and industrial waste water (hereinafter referred to as "waste water") is stored, and a fluid pump 2 set for feeding the waste water to a neutralization tank 4 through a pipe 3.
The neutralization tank 4 is supplied with a predetermined amount of coagulant from a coagulant reservoir 5.
In this embodiment, the coagulant is selected from a sulfate compound, PAC, calcium chloride, and the like.
At the bottom of the neutralization tank 4, a fluid pump 6 is set and connected to a pipe 7.
The pipe 7 is further connected to a first line mixer 8, a first reaction cylinder 9, a second line mixer 10, and a second reaction cylinder 11.
The second reaction cylinder 11 is connected to a centrifugal separator 13 through a pipe 12.
Furthermore, this system includes first and second flocculation units for adding high molecular flocculant to the pipe 7 to flocculate fine particles.
The first flocculation unit is composed of a flocculant reservoir 14 and a pump 15 set before the line mixer 8, and the second flocculation unit is composed of a flocculant reservoir 16 and a pump 17 is set after the first reaction cylinder 9.
The centrifugal separator 13 is connected to a liquid cleansing tank 20 through a pipe 29.
In the cleansing tank 20, a pump 21 is set and connected to a pipe 22 for final disposal.
Furthermore, separator 13 is connected to a solid part treatment unit 24 through a pipe 23
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