GB1499722A - Gas removal from filters - Google Patents

Gas removal from filters

Info

Publication number
GB1499722A
GB1499722A GB241375A GB241375A GB1499722A GB 1499722 A GB1499722 A GB 1499722A GB 241375 A GB241375 A GB 241375A GB 241375 A GB241375 A GB 241375A GB 1499722 A GB1499722 A GB 1499722A
Authority
GB
United Kingdom
Prior art keywords
bed
pipes
gas
sewage
air
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
Application number
GB241375A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dravo Corp
Original Assignee
Dravo Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dravo Corp filed Critical Dravo Corp
Publication of GB1499722A publication Critical patent/GB1499722A/en
Expired legal-status Critical Current

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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2806—Anaerobic processes using solid supports for microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/22—Downward filtration, the filter material being supported by pervious surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

1499722 Aerobic treatment of sewage DRAVCO CORP 20 Jan 1975 [22 Feb 1974] 2413/75 Heading ClC [Also in Division B1] Sewage is purified by mechanical or bacteriological filtration by flowing upwards or downwards through a bed 5 of sand, anthracite, gravel or plastics spheres of 1-6 mm. diameter, the bed being 3-20 feet deep and having buried therein elongated lengths of fritted glass or perforate pipes 19 connected to a riser 23 and serving to remove accumulated nitrogen, air, CH 4 , H 2 S or CO 2 from the bed. Pipes 19 may bleed the gas off continuously or intermittently through valve 25, or air or water is injected into pipes 19 to force the gas to the bed surface (Fig. 1, not shown). Alternatively (Fig. 3) the air or water is injected into a lower set of pipes 33 and the gas bled off through upper pipes 19 and valve 25. Valves 25 and 39 may be opened automatically by a float switch or electrodes, which detect a rise in the level of sewage above the bed when the bed is clogged by accumulated gas. The incoming sewage from pipe 9 may come from a settling tank or activated sludge plant.
GB241375A 1974-02-22 1975-01-20 Gas removal from filters Expired GB1499722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US44488774A 1974-02-22 1974-02-22

Publications (1)

Publication Number Publication Date
GB1499722A true GB1499722A (en) 1978-02-01

Family

ID=23766753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB241375A Expired GB1499722A (en) 1974-02-22 1975-01-20 Gas removal from filters

Country Status (4)

Country Link
JP (1) JPS5517637B2 (en)
CH (1) CH597897A5 (en)
GB (1) GB1499722A (en)
ZA (1) ZA75396B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149390A (en) * 1983-09-21 1985-06-12 Biomass International Anaerobic fermentation process
GB2152021A (en) * 1983-11-11 1985-07-31 Projekt Wasserwirtschaft Veb Biological treatment of effluent
GB2159808A (en) * 1984-06-08 1985-12-11 Projekt Wasserwirtschaft Veb Process for conditioning organic sludge
GB2252311A (en) * 1991-01-10 1992-08-05 Mossgiel Environmental Consult "A sewage treatment system"
CN105645601A (en) * 2016-03-24 2016-06-08 北京泰昌科睿环保科技有限公司 Biological filtration tank and sewage treatment method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US323243A (en) * 1885-07-28 Albert g-
JPS5019256A (en) * 1973-06-23 1975-02-28

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149390A (en) * 1983-09-21 1985-06-12 Biomass International Anaerobic fermentation process
GB2152021A (en) * 1983-11-11 1985-07-31 Projekt Wasserwirtschaft Veb Biological treatment of effluent
GB2159808A (en) * 1984-06-08 1985-12-11 Projekt Wasserwirtschaft Veb Process for conditioning organic sludge
GB2252311A (en) * 1991-01-10 1992-08-05 Mossgiel Environmental Consult "A sewage treatment system"
CN105645601A (en) * 2016-03-24 2016-06-08 北京泰昌科睿环保科技有限公司 Biological filtration tank and sewage treatment method

Also Published As

Publication number Publication date
CH597897A5 (en) 1978-04-14
ZA75396B (en) 1976-02-25
JPS5517637B2 (en) 1980-05-13
JPS50121864A (en) 1975-09-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee