US3749246A - Overflow arrangement - Google Patents
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- Publication number
- US3749246A US3749246A US3749246DA US3749246A US 3749246 A US3749246 A US 3749246A US 3749246D A US3749246D A US 3749246DA US 3749246 A US3749246 A US 3749246A
- Authority
- US
- United States
- Prior art keywords
- chamber
- baffle
- aerating
- liquid
- conduit means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/121—Multistep treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- An aerobic sewage treatment system includes a plural- [51] Int. Cl B0111 21/08 ity of series-connected aerated digestion chambers.
- Field of Search 210/63, 199, 201 order to prevent passage of solids from one chamber to 210/205, 221, 322, 84, 207 the next downstream chamber the liquid connection between the chambers is formed by a specially shaped [56] References Cited conduit having an open inlet end disposed within a UNITED STATES PATENTS quiet portion of its respective chamber. 2,486,691 11/1949 Travers 210/201 X 6 Claims, 3 Drawing Figures /8 /6 A.
- This invention relates to multistage aerobic sewage treatment systems and in particular to the construction of the liquid connections between the digestion stages and to the internal configuration of the stages.
- FIG. 1 is a schematic vertical sectional view of a multistage aerobic system embodying the principles of the present invention
- FIG. 2 is a sectional view taken on the line 2-2 of FIG. 1;
- FIG. 3 is a partial sectional view of a modified digestion chamber.
- FIGS. 1 and 2 illustrate in simplified form a multistage aerobic digestion system having a main digestion chamber and a plurality of secondary digestion chambers 12, l4, l6 and 18 separated from each other by partitions 20.
- the main chamber 10 is provided with an inlet 22 for receiving undigested raw sewage.
- each chamber is divided into a mixing and aerating portion 24 and a quiet portion 26 by a suitable baffle arrangement.
- each chamber includes two downwardly facing concave baffles 28 and 30 disposed generally on opposite sides of the chamber. These baffles also cooperate with an upwardly facing concave bottom wall 32 and with an aerator device 34 to mix the contents of the chamber as shown by the arrows in FIG. 2.
- the aerator device 34 may be a horizontal perforated tube or one or more conventional air stones located at or near the lowermost point in the chamber and next to the respective side wall 36.
- the liquid connection between digestion chambers is made in'such' a manner that there will be little or no tendency for solid material to flow from one chamber to another, the purpose of this featurebeing to prevent entry of raw sewage into the downstream stages.
- the purpose of this feature being to prevent entry of raw sewage into the downstream stages.
- filters for this purpose because in the event of a closgged filter the upstream stages will overflow during operation.
- the present invention accomplishes this objective by providing unobstructed, specially-shaped conduit connections 37 between a quiet portion of an upstream stage and an aerating portion of the adjacent downstream stage.
- the configuration of the quiet portion is not critical, and the quiet portions 26 defined between the baffles 28 and the adjacent side walls 38 is merely illustrative.
- the structure which defines a quiet portion should extend above liquid level 40 to prevent floating solids from approaching the connection 37.
- the structure should include 'a bottom opening,'such as shown at 42, in communication with the aerating portion 24 to allow any solids finding their way into the portion 26 to settle and return to the portion 24.
- Each ofthe connections 37 is constructed as a double elbow having a horizontal inlet portion 44' disposed below liquid level 40, a vertical portion 46 extending to above liquid level 40, and a horizontal outlet portion 48 projecting through the respective portion 20.
- the inlet aperture faces the partition and is closely spaced therefrom.
- the illustrated baffle 50 is a flat plate secured to the partition 20 and extending downwardly and in an upstream direction as viewed in FIG. 1
- the size of the quiet portion 26 should be larger in volume than the greatest maximum expected intake volume of the main chamber 10 at any one time or hour.
- organic waste is delivered to the main chamber through the inlet 22, causing an increase in liquid level with the result that liquid flows sequentially through the chambers via the connectors 37.
- the liquid is thoroughly agitated and aerated in each chamber portion 24, but the agitated solids do not pass into the portions 26. Therefore, raw sewage particles are retained in the main chamber 10, and the liquid in each successive chamber l2, l4, l6 and 18 is progressively purified by aerobic digestion.
- FIG. 3 illustrates a modification in which the quiet chamber portion 26' is defined between a partition 20' and a vertical transverse baffle 52 which extends between the side walls of the chamber.
- a digestion treatment system for purifying organic waste material dissolved in or dispersed in water comprising: walls defining a main digestion chamber having inlet means for receiving organic waste material and walls defining a plurality of separate secondary digestion chambers, each of said secondary chambers including baffle means dividing the chamber into an agitating and aerating portion and a smaller quiet portion which are in communication with each other only through a submerged passageway of relatively small cross-sectional area; means in each agitating and aerating portion for introducing air bubbles into the liquid in that portion and for mixing the entire liquid contents of that portion; and conduit means for connecting the quiet portion of each secondary chamber to the aerating portion of one other chamber to thereby provide for flow of liquid waste from the main chamber sequentially through the secondary chambers to an outlet means, each conduit means having an unobstructed bore and including a horizontally facing inlet aperture disposed below the liquid level in the quiet portion of the respective secondary chamber, a vertical tubular portion extending upwardly through the liquid surface, and a-horizontally facing outlet aperture
- each said baffle means which divides a secondary chamber into an acrating portion and a quiet portion includes a downwardly concave baffle having an upper end disposed at about liquid level and a lower end disposed below the respective conduit means andwherein the respective aerating and mixing means includes means for introducing air bubbles into the bottom of the aerating 'portion at a location remote from the respective conduit means and an additional concave baffle which directs the rising air bubbles toward said first-named baffle as turc.
- each chamber is separated from the adjacent downstream chamber by a common vertical wall, said conduit means being located at the common wall, and said bafflc extending from the common wall.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13535371A | 1971-04-19 | 1971-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3749246A true US3749246A (en) | 1973-07-31 |
Family
ID=22467718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3749246D Expired - Lifetime US3749246A (en) | 1971-04-19 | 1971-04-19 | Overflow arrangement |
Country Status (2)
Country | Link |
---|---|
US (1) | US3749246A (en) |
CA (1) | CA972879A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3990967A (en) * | 1969-04-03 | 1976-11-09 | Hargraves William J | Positive progressive biochemical digestion of organic waste |
US4362627A (en) * | 1978-09-13 | 1982-12-07 | Fly Anderson B | Cellular flow system and method |
EP0070960A1 (en) * | 1981-07-29 | 1983-02-09 | Bayerische Milchindustrie eG | Apparatus for the biological purification of organic waste water |
US4422929A (en) * | 1981-09-02 | 1983-12-27 | Owens Dewey E | Wastewater treatment plant |
US4578189A (en) * | 1984-08-24 | 1986-03-25 | Stetter Gmbh | Sludge settling plant |
US4610785A (en) * | 1985-01-03 | 1986-09-09 | Protectaire Systems Co. | Sludge separation apparatus |
US5529702A (en) * | 1994-04-11 | 1996-06-25 | American Coating Technologies Inc. | Method for removing oil from a parts cleaning tank and the cleaning solution therein |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1485623A (en) * | 1922-07-22 | 1924-03-04 | Mayo Charles Matthew | Septic tank |
US2486691A (en) * | 1949-01-19 | 1949-11-01 | Mary E Mcdonald | Apparatus for purifying sewage and industrial wastes |
US2852140A (en) * | 1957-03-13 | 1958-09-16 | Albert S Maclaren | Unitary tank for the treatment of sewage |
US3507393A (en) * | 1969-06-18 | 1970-04-21 | Union Tank Car Co | Sewage treatment system |
-
1971
- 1971-04-19 US US3749246D patent/US3749246A/en not_active Expired - Lifetime
-
1972
- 1972-04-07 CA CA139,160A patent/CA972879A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1485623A (en) * | 1922-07-22 | 1924-03-04 | Mayo Charles Matthew | Septic tank |
US2486691A (en) * | 1949-01-19 | 1949-11-01 | Mary E Mcdonald | Apparatus for purifying sewage and industrial wastes |
US2852140A (en) * | 1957-03-13 | 1958-09-16 | Albert S Maclaren | Unitary tank for the treatment of sewage |
US3507393A (en) * | 1969-06-18 | 1970-04-21 | Union Tank Car Co | Sewage treatment system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3990967A (en) * | 1969-04-03 | 1976-11-09 | Hargraves William J | Positive progressive biochemical digestion of organic waste |
US4362627A (en) * | 1978-09-13 | 1982-12-07 | Fly Anderson B | Cellular flow system and method |
EP0070960A1 (en) * | 1981-07-29 | 1983-02-09 | Bayerische Milchindustrie eG | Apparatus for the biological purification of organic waste water |
US4422929A (en) * | 1981-09-02 | 1983-12-27 | Owens Dewey E | Wastewater treatment plant |
US4578189A (en) * | 1984-08-24 | 1986-03-25 | Stetter Gmbh | Sludge settling plant |
US4610785A (en) * | 1985-01-03 | 1986-09-09 | Protectaire Systems Co. | Sludge separation apparatus |
US5529702A (en) * | 1994-04-11 | 1996-06-25 | American Coating Technologies Inc. | Method for removing oil from a parts cleaning tank and the cleaning solution therein |
Also Published As
Publication number | Publication date |
---|---|
CA972879A (en) | 1975-08-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: VEER DER VAN, RICHARD; 4521 PAWNEE TRAIL, SARASOTA Free format text: LIEN;ASSIGNOR:HARGRAVES, W.J.;REEL/FRAME:003933/0496 Effective date: 19810310 |
|
AS | Assignment |
Owner name: HARGRAVES, BEATRICE A.,FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VAN DER VEER, RICHARD;REEL/FRAME:004558/0773 Effective date: 19811127 Owner name: HARGRAVES, W.J.,FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VAN DER VEER, RICHARD;REEL/FRAME:004558/0773 Effective date: 19811127 Owner name: HARGRAVES, BEATRICE A. DUNEDIN, FL. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:VAN DER VEER, RICHARD;REEL/FRAME:004558/0773 Effective date: 19811127 Owner name: HARGRAVES, W.J., DUNEDIN, FL. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:VAN DER VEER, RICHARD;REEL/FRAME:004558/0773 Effective date: 19811127 |