GB285944A - Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid - Google Patents
Improvements in or connected with the activated sludge process of purifying sewage and other impure liquidInfo
- Publication number
- GB285944A GB285944A GB2682726A GB2682726A GB285944A GB 285944 A GB285944 A GB 285944A GB 2682726 A GB2682726 A GB 2682726A GB 2682726 A GB2682726 A GB 2682726A GB 285944 A GB285944 A GB 285944A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tanks
- sludge
- tank
- treatment
- settling
- 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
Links
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
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1257—Oxidation ditches
-
- 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
-
- 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
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)
- Activated Sludge Processes (AREA)
Abstract
285,944. Activated Sludge, Ltd., and Coombs, J. A. Oct. 27, 1926. Aerating; gravity-separation apparatus; plant. -The activated-sludge process of treatment is carried out in two stages, each stage comprising the addition of sludge and aeration. The sludge used for the different stages is separately revivified. The first stage of treatment leads to the separation of carbonaceous material and the second to the conversion of the ammonia compounds present into nitrites and nitrates, the conversion being effected by bacteria cutivated in sludge which has not been in contact with sewage containing large quantities of carbonaceous material. Preliminary treatment may include the removal of detritus, aeration and settling. Surplus sludge obtained in the main treatment may be mixed with the sewage during the preliminary treatment. Grease may be separated from the sewage either during the preliminary treatment or at a subsequent stage. Fig. 1 shows a suitable arrangement of tanks. Sewage is mixed in a main 4 with sludge from revivifying tanks 2 and delivered to the firststage treatment tanks 1, whence it passes through pipes 23 to settling tanks 3. The effluent from the tanks 3 passes to the main 6, is mixed with sludge from revivifying tanks 2<1> and delivered to treatment tanks 1<1>. The mixed liquid from the tanks 1<1> passes to settling-tanks 3<1>. Effluent from the settling-tanks 3<1> enters the discharge main 9. Sludge from the settling- tanks 3 is raised by air lifts 11 in wells 12 to the tanks 2, and sludge from the tanks 3<1> is transferred similarly to tanks 2<1>. The tanks 1 may be provided with transverse walls 74 with valves 75, so that the ends of the tanks may be shut off and used for impounding liquid. Surplus sludge from the second stage of the treatment may be passed back through pipes 76, 77 to the tanks 1. Fig. 3 shows a settling-tank with a central inlet 32, sludge discharge passage 35 with adjustable outlet 37 in a chamber 36, and effluent outlets 33 on a pipe 34 leading to a trough 41 separated by a valve 42 from a discharge conduit 43. When the valve 42 is partially or wholly closed the liquid level is raised and grease overflows into a trough 45. The raising of the level will cause the passage 35 to be flushed. Fig. 4 shows plant including a preliminary aerating tank 60 and settling-tank 61. The sludge from the tank 2 can be passed into the conduit 4 or direct through valves 52 into the tank 1. Surplus sludge is conveyed from the well 12 through a chamber 55 either to an entrance chamber 59 or through valves 66 into the tanks 1. In another form of apparatus a tank is provided in which sludge from the tank 2 undergoes more prolonged aeration in an additional tank and is then returned to the tank 2 or passed direct to the tank 1. In the apparatus shown in Fig. 6, sludge from the tank 2 is passed in part to an inlet chamber 59 of the tank 1 and in part to a chamber 72 where it is mixed with a highly oxidized sludge from a tank 2<x> and afterwards delivered to the tank 1. Specifications 21976/14, 104,187, 161,164, 170,263, and 270,012 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2682726A GB285944A (en) | 1926-10-27 | 1926-10-27 | Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2682726A GB285944A (en) | 1926-10-27 | 1926-10-27 | Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB285944A true GB285944A (en) | 1928-02-27 |
Family
ID=10249871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2682726A Expired GB285944A (en) | 1926-10-27 | 1926-10-27 | Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB285944A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9155981B2 (en) | 2012-06-07 | 2015-10-13 | Torchlight Energy Resources, LTD. | Liquid settling systems and methods |
CN112811636A (en) * | 2021-01-17 | 2021-05-18 | 李青 | Water temperature-based self-draining type town sewage treatment device |
-
1926
- 1926-10-27 GB GB2682726A patent/GB285944A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9155981B2 (en) | 2012-06-07 | 2015-10-13 | Torchlight Energy Resources, LTD. | Liquid settling systems and methods |
CN112811636A (en) * | 2021-01-17 | 2021-05-18 | 李青 | Water temperature-based self-draining type town sewage treatment device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2065123A (en) | Sewage treatment | |
US2228017A (en) | Sewage disposal | |
US2348126A (en) | Sewage purification | |
US2360812A (en) | Purification of liquids | |
US2419492A (en) | Sewage treatment | |
ES300471A1 (en) | Apparatus and method for clarifying water | |
US2517792A (en) | Method of and apparatus for treatment of sewage | |
US1904916A (en) | Activated sludge process of sewage and other impure liquid purification | |
US1991896A (en) | Sewage treating process | |
US2394413A (en) | Sewage treatment | |
US2713028A (en) | Sewage treatment | |
US1642206A (en) | Apparatus for sewage treatment by activated sludge in combination with sludge digestion | |
US2348125A (en) | Sewage treatment | |
GB1136568A (en) | Process and apparatus for the clarification treatment of solids-carrying liquids | |
US2090405A (en) | Means for purifying polluted liquids | |
US1820976A (en) | Sewage treatment | |
US1820977A (en) | Complete sewage treatment plant with submerged contact aerators | |
US2089162A (en) | Process for concentrating activated sewage sludge | |
Minton et al. | Combined biological-chemical phosphorus removal | |
US2442809A (en) | Water treating system comprising a sedimentation tank having a reagent line and means for withdrawing sludge from said tank and adding it to said line | |
GB285944A (en) | Improvements in or connected with the activated sludge process of purifying sewage and other impure liquid | |
IL28726A (en) | Method of purifying waste liquid from water closets and other sanitary installations | |
US2077498A (en) | Disposal of sewage and the like | |
US2118266A (en) | Sewage treatment | |
US2694043A (en) | Sewage treatment |