# US 5,702,594 A · Apparatus for treatment of waste water and/or exhaust gases containing fluorine and surface active agents

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- Number: US 5,702,594 A
- Document ID: US5702594A
- Status: Granted
- Kind: A
- Application number: 08/465,755
- Filed: 1995-06-06
- Granted: 1997-12-30
- Earliest claimed: 1994-08-26
- Assignees: Sharp Kabushiki Kaisha
- Inventors: Kazuyuki Yamasaki; Masaki Kataoka; Kazuyuki Sakata; Shirou Imazu
- Web page: https://patentgrep.com/patent/US5702594A

## CPC

- C02F 1/281: {using inorganic sorbents}
- C02F 1/583: {by removing fluoride or fluorine compounds}
- C02F 3/043: {Devices for distributing water over trickle filters}
- C02F 2101/14: Fluorine or fluorine-containing compounds
- Y02W 10/10: Biological treatment of water, waste water, or sewage
- Y10S 210/915: Fluorine containing
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A first reaction/adjustment tank has a lower portion containing a calcium carbonate mineral, an upper portion containing a calcium carbonate mineral and a plastic filler, and an air lift pump for circulating waste water from the lower portion to the upper portion. Exhaust gas is introduced into a space. A second reaction/adjustment tank has a lower portion containing a calcium carbonate mineral and charcoal, and an upper portion containing charcoal and a plastic filler. Waste water circulates sequentially through the lower and upper portions of the first reaction/adjustment tank, and the lower and upper portions of the second reaction/adjustment tank. Exhaust gas circulates sequentially through the upper portion of the first reaction/adjustment tank and the upper portion of the second reaction/adjustment tank.

## Claims

### Claim 1

A waste water treating apparatus comprising:
a lower portion having a calcium carbonate mineral packed therein so as to be submerged in waste water introduced in the lower portion, and aeration means for agitating the waste water through aeration;
an upper portion located above the lower portion and at a level higher than the surface of the waste water introduced in the lower portion, the upper portion having a calcium carbonate mineral and a plastic filler which are so packed therein as to allow water penetration therethrough;
waste water circulation means for pumping up waste water from the lower portion to the upper portion and spraying the pumped waste water over the upper portion; and
exhaust gas introduction means for introducing exhaust gas into a space between the lower portion and the upper portion.

### Claim 2

A waste water treating apparatus comprising:
a first tank comprising:
a first lower portion having a calcium carbonate mineral packed therein so as to be submerged in waste water introduced in the first lower portion, and aeration means for agitating the waste water through aeration;
a first upper portion located above the first lower portion and at a level higher than the surface of the waste water introduced in the first lower portion, the first upper portion having a calcium carbonate mineral and a plastic filler which are so packed therein as to allow water penetration therethrough;
waste water circulation means for pumping up waste water from the first lower portion to the first upper portion and spraying the pumped waste water over the first upper portion; and
first exhaust gas introduction means for introducing exhaust gas into a first space between the first lower portion and the first upper portion;
a second tank comprising:
a second lower portion having a calcium carbonate mineral and charcoal which are packed therein so as to be submerged in the waste water introduced from the first lower portion, and aeration means for agitating the waste water through aeration;
a second upper portion located above the second lower portion and at a level higher than the surface of the waste water introduced in the second lower portion, the second upper portion having charcoal and a plastic filler which are so packed therein as to allow water penetration therethrough;
waste water circulation means for pumping up waste water from the second lower portion to the second upper portion and spraying the pumped waste water over the second upper portion; and
second exhaust gas introduction means for introducing exhaust gas from the first tank into a second space between the second lower portion and the second upper portion.

### Claim 3 (depends on 2)

A waste water treating apparatus as set forth in claim 2, further comprising:
a third tank for receiving waste water from the second tank, the third tank including agitation means for agitating the waste water introduced into the third tank and sludge fixing means for immobilizing sludge, the third tank being adapted to be loaded with an aluminum agent and a polymer coagulant;
a fourth tank which receives waste water from the third tank and in which the waste water is subjected to solid-liquid separation, a supernatant resulting from the separation being discharged from the fourth tank;
a fifth tank which receives a sludge formed by precipitation in the fourth tank and in which the sludge is concentrated by sedimentation;
dehydrator means which receives the sludge concentrated in the fifth tank for dehydrating the sludge; and
sludge return means for returning the sludge formed in the fourth tank to at least one of the first upper portion of the first tank, the second upper portion of the second tank, and the sludge fixing means of the third tank.