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Topic: Imhoff tank


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In the News (Mon 7 Dec 09)

  
  Imhoff tank - Wikipedia, the free encyclopedia
The Imhoff tank is a chamber suitable for the reception and processing of sewage.
The Imhoff tank is in effect a two-story septic tank and retains the septic tank's simplicity while eliminating many of its drawbacks, which largely result from the mixing of fresh sewage and septic sludge in the same chamber.
Imhoff tanks are being superseded in sewage treatment by plain sedimentation tanks using mechanical methods for continuously collecting the sludge, which is moved to separate digestion tanks.
en.wikipedia.org /wiki/Imhoff_tank   (267 words)

  
 Imhoff tank -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-09)
The Imhoff tank is a chamber suitable for the reception and processing of (Waste matter carried away in sewers or drains) sewage.
The Imhoff tank is in effect a two-story (Large tank where solid matter or sewage is disintegrated by bacteria) septic tank and retains the septic tank's simplicity while eliminating many of its drawbacks, which largely result from the mixing of fresh sewage and septic sludge in the same chamber.
Imhoff tanks are being superseded in (Click link for more info and facts about sewage treatment) sewage treatment by plain sedimentation tanks using mechanical methods for continuously collecting the sludge, which is moved to separate digestion tanks.
www.absoluteastronomy.com /encyclopedia/i/im/imhoff_tank.htm   (293 words)

  
 Wikipedia: Sludge
When fresh sewage water is added to a settling tank, approximately 50% of the suspended solid matter will settle out in the period of an hour and a half or so.
In an Imhoff tank, fresh sludge is passed through a slot to the lower story or digestion chamber where decomposition by anaerobic bacteria takes place resulting in liquefaction and a reduction in the volume of the sludge.
Alternately, the fresh sludge may be continuously extracted from the tank by mechanical means and passed on to separate sludge digestion tanks which operate at higher temperatures than the lower story of the Imhoff tank and as a result digest much more rapidly and efficiently.
www.factbook.org /wikipedia/en/s/sl/sludge.html   (216 words)

  
 Search Encyclopedia.com
tank, military tank, military, armored vehicle having caterpillar traction and armed with machine guns, cannon, rockets, or flame throwers.
Central to the waging of mechanized warfare are the tank and armored vehicle, with support and supply from motorized columns and aircraft.
The automatic tank resuscitator consists of a face mask that fits tightly over the nose and mouth and is connected by a tube to one or more tanks of gas.
www.encyclopedia.com /searchpool.asp?target=Infantry+tank   (493 words)

  
 Search Encyclopedia.com
The tank, together with the airplane, opened up modern warfare, which had been immobilized and stalemated by the use of rifled guns (see mechanized warfare).
septic tank septic tank, underground sedimentation tank in which sewage is retained for a short period while it is decomposed and purified by bacterial action.
The organic matter in the sewage settles to the bottom of the tank, a film forms excluding atmospheric oxygen, and anaerobic bacteria attack the solid matter, causing it t...
www.encyclopedia.com /searchpool.asp?target=Tank+locomotive   (510 words)

  
 treat   (Site not responding. Last check: 2007-10-09)
The important thing to remember about Imhoff cones is that it is simply glassware used in the lab to measure the settleable solids in wastewater.
The final diagram given below is the Imhoff tank (not to be confused with the Imhoff cone mentioned above, which is simply glassware used in the lab).
This Imhoff tank is used in smaller municipalities.
www.csun.edu /~vchsc006/356b/treat2.html   (193 words)

  
 Encyclopedia: Septic tank   (Site not responding. Last check: 2007-10-09)
An Imhoff tank is a two stage septic system where the sludge is digested in a separate tank.
Also some septic tank designs have a second stage where the effluent from the anaerobic first stage is aerated, before it drains into the seepage field.
In Cockney Rhyming Slang (common in Britain and Australia) "septic tank" or, more commonly, simply "septic" is used as a pejorative word for an American, based on a rhyme for "Yank".
www.nationmaster.com /encyclopedia/Septic-tank   (937 words)

  
 Station Information - Septic tank
An Imhoff tank is a two stage septic where the sludge is digested in a separate tank.
Waste that is not decomposed by the anaerobic digestion eventually has to be removed from the septic tank or else the septic tank fills up and wastewater discharges directly to the drainage field.
In Cockney and Australian slang "septic tank" or, more commonly, simply "septic" can be a pejorative word for an American, based on rhyming slang for "Yank".
www.stationinformation.com /encyclopedia/s/se/septic_tank.html   (421 words)

  
 Virtual Naval Hospital: Manual of Naval Preventive Medicine: Chapter 7: Wastewater Treatment and Disposal, Ashore and ...   (Site not responding. Last check: 2007-10-09)
Sewage is discharged into the tank where a series of baffles are placed to slow the flow, allowing the solids to settle and be retained.
The Imhoff tank (Figure 7-3) obtained its name from its inventor, Dr. Karl Imhoff of Germany.
The upper sedimentation or flow chamber is for settling solids and the lower chamber is for anaerobic digestion of sludge.
www.vnh.org /PreventiveMedicine/Chapter7/7.08.html   (937 words)

  
 tank
The first prototype tank was tested for the British Army for the first time on September 6, 1915, and used in combat for the first time at the Battle of the Somme, 15 September 1916.
Paradoxically a tank is usually in its safest state when the commander is in a personally unsafe position, riding in the open, head out of the turret, with no personal protection save his helmet and a flack jacket.
Since an immobilized tank is an easy target for mortars, artillery and the usual specialized tank hunting units of the enemy forces, speed is normally kept to a minimum and every occasion is seized upon to move tanks on wheeled tank transporters and on railways, instead of on their own power.
www.fact-library.com /tank.html   (1704 words)

  
 Kids.net.au - Encyclopedia Sewage treatment -   (Site not responding. Last check: 2007-10-09)
The sludge is then run through another settling tank, or in some plants, pressed between mesh conveyor belts to wring out the water.
The water from the aerator is moved to a settling tank.
Algae and rotifers are grown in a "clarifier" tank, or perhaps in a trickle fiter with a trickle of water over "biofilms" grown on limestone chips.
www.kids.net.au /encyclopedia-wiki/se/Sewage_engineering   (1702 words)

  
 Septic Tank   (Site not responding. Last check: 2007-10-09)
A sewage settling tank in which part of the sewage is converted into gas and sludge before the remaining waste is discharged by gravity into a leaching bed underground.
A settling tank in which settled sludge is in immediate contact with sewage flowing through the tank, and wherein solids are decomposed by anaerobic bacterial action.
Bacteria in the tank decompose organic wastes and the sludge settles to the bottom of the tank.
www.websters-online-dictionary.org /definition/Septic+Tank   (1014 words)

  
 AllRefer.com - septic tank, Environment (Environmental Studies) - Encyclopedia
septic tank, underground sedimentation tank in which sewage is retained for a short period while it is decomposed and purified by bacterial action.
The organic matter in the sewage settles to the bottom of the tank, a film forms excluding atmospheric oxygen, and anaerobic bacteria attack the solid matter, causing it to disintegrate, liquefy, and give off gases.
The Imhoff septic tank, an improvement over the ordinary septic tank, is still used in the United States; it is a two-story structure with the upper compartment used for settling the sewage, the lower one for the anaerobic disintegration of sludge.
reference.allrefer.com /encyclopedia/S/septicta.html   (356 words)

  
 Waste Water Treatment Systems   (Site not responding. Last check: 2007-10-09)
Activated sludge from final clarification section is pumped to the sludge storage tank, where the sludge is thickened and the sludge water flows by gravity back to the treatment process.
It consists of a primary settlement tank with an Imhoff type settling chamber, a low loaded activated sludge tank with nitrification and de-nitrification provided, hopper bottomed clarifier and sludge stabilisation provided in the Imhoff tank.
During denitrification phase the contents of the aeration tank is mixed by means of an agitator to keep activated sludge in suspension.
www.ambill.net /kompakt/kompakt.html   (614 words)

  
 Imhoff tank   (Site not responding. Last check: 2007-10-09)
It may be used for the clarification of sewage by simple sedimentation, along with digestion ofthe extracted sludge.
The Imhoff tank is in effect a two-story septic tank and retains the septic tank's simplicity while eliminating many of itsdrawbacks, which largely result from the mixing of fresh sewage and septic sludge in the same chamber.
Imhoff tanks are being superseded in sewage treatment by plainsedimentation tanks using mechanical methods for continuously collecting the sludge, which is moved to separate digestion tanks.This arrangement permits both improved sedimentation results and better temperature control in the digestion process, leading toa more rapid and complete digestion of the sludge.
www.therfcc.org /imhoff-tank-152227.html   (248 words)

  
 CUMBERLAND COUNTY UTILITIES AUTHORITY   (Site not responding. Last check: 2007-10-09)
In 1954, new larger rectangular settling tanks were installed in place of the now outdated Imhoff Tanks.
Solids gathered from the new tanks were pumped to a digester and then into a large glass enclosed greenhouse in which the sludge was dried.
A secondary settling tank and a chlorine contact tank were also added to improve efficiency and to disinfect treated wastewater before discharge into the Cohansey River.
www.ccua.info /history.shtml   (611 words)

  
 Septic Tank Installation   (Site not responding. Last check: 2007-10-09)
How often the septic tank has to be pumped out depends on the volume of the tank relative to the input of solids, the amount of indigestible solids
A complete modern septic system consists of a buried concrete septic tank, usually 1000 to 1500 gallon capacity, that holds the solid waste from a home's plumbing waste drains, and a septic drain field, that distributes the waste water to the ground where it disperses through the soil or evaporates.
Septic drain fields are used to remove contaminants and impurities from the liquid that emerges from the septic tank.
www.awonky.com /pages2/78/septic-tank-installation.html   (1246 words)

  
 Teaneck Public Library Online
The sewage is led into the upper tank and passes through it at such a slow rate that much of the solid material in suspension falls to the bottom.
The solid material which has fallen into the lower tank slowly rots until finally all the organic material is gone, and only the inorganic is left.
This material is technically known as sludge, and through a proper arrangement of pipes and pumps it is periodically raised from the bottom of the tanks and spread on glass covered drying beds.
www.teaneck.org /virtualvillage/DPW/1937report/page10.html   (736 words)

  
 ModA
Sedimentation tanks can also be adapted for secondary and tertiary processes, and can also be used to treat drinking water.
A septic tank is a water tight tank.
We see waste moving from the house to the septic tank, and eventually making its way to an "absorption field." Wastewater is draining directly into the soil in the absorption field.
www.csun.edu /~vchsc006/356b/B09.html   (1658 words)

  
 Sheets from Sanex
The sludge layer at the bottom of the tank is a result of the settling process.
septic tank maintenance is the task of the household and sewerage maintenance is the task of the municipality).
Imhoff tanks require wasting of sludge and removal of scum at regular intervals.
www.rekel.nl /water/nepal_workshop/sanex/sheets.htm   (5562 words)

  
 KOMPAKT Waste Water Treatment Systems   (Site not responding. Last check: 2007-10-09)
The above description implies that, given a constant size of the aeration tanks, both the BOD load of sludge and sludge age, are mainly dependant on the concentration of sludge in the aeration tank (X).
Adequate sludge content in the aeration tank is a pre-condition for proper operation of the biological stage of the plant.
The tanks must be filled up with water evenly so that all functional tanks are filled in order to avoid collapsing of walls that are not dimensioned for water over-pressure due to differences in water levels in individual tanks.
www.ambill.net /kompakt/kompakt_instructions.html   (5535 words)

  
 Septic_tank   (Site not responding. Last check: 2007-10-09)
A septic tank is part of a small scale sewage treatment system often referred to as a septic system, which consists of the tank itself and a septic drain field.
The septic tank itself almost never fails; it is the leach field that fails.
However, it is not unusual to find better growth over the septic tank itself as well, particularly the end nearest the leach field.
www.school-explorer.com /info/Septic_tank   (662 words)

  
 Re: Imhoff, of "Imhoff tank" fame   (Site not responding. Last check: 2007-10-09)
In Reply to: Re: Imhoff, of "Imhoff tank" fame by david j.
She has supervised the burying of many septic tanks on farms across Colorado, and, as she put it...
"The last thing I see of those septic tanks, as spades of dirt are thrown into the hole, is the name 'Imhoff' across the top of the tank." She said "Imhoff" is to septic tanks as "Otis" is to elevators.
www.jenforum.com /imhoff/messages/165.html   (97 words)

  
 Wetland System   (Site not responding. Last check: 2007-10-09)
Furthermore it is recommendable to install a screen before the tank in order to retain larger solids such as plastic bags or sanitary articles.
Although little SO is produced in anaerobic processes with domestic waste water, a simple biological treatment of the exhaust gases of the Imhoff tank has been designed using bark of any tree as a substrate for SO consuming bacteria.
There is less generation of sludge on the bottom of the Imhoff tank and of slime on the surface than expected.
www.ibw.com.ni /~biomasa/biofilt.htm   (1581 words)

  
 [No title]   (Site not responding. Last check: 2007-10-09)
The imhoff tank was constructed in 1954, at the same time that the Phil-Am Village was developed.
imhoff tank, serving an estimated population of 12,929.
Most residential houses treat their wastewater by means of septic tanks or centralized imhoff tanks, which do not provide adequate treatment to satisfy the DENR requirements for wastewater effluent standards.
www-wds.worldbank.org /servlet/WDSContentServer/WDSP/IB/2002/05/03/000094946_02042504042580/Rendered/INDEX/multi0page.txt   (4979 words)

  
 Imhoff tank - Encyclopedia Glossary Meaning Explanation Imhoff tank   (Site not responding. Last check: 2007-10-09)
Imhoff tank - Encyclopedia Glossary Meaning Explanation Imhoff tank.
Here you will find more informations about Imhoff tank.
The orginal Imhoff tank article can be editet
www.encyclopedia-glossary.com /en/Imhoff-tank.html   (317 words)

  
 NALDI - biological wastewater treatment plants (WWTP) for households and small communities   (Site not responding. Last check: 2007-10-09)
The Imhoff tank is made of two separate zones.
In the upper settling zone, the sewage flow is very slow, thus causing a settling of about an half of the suspended solids (removing between 30 to 40 percent of the BOD), that drops in the lower digester zone.
Naldi Imhoff tanks are built in one factory assembled unit of FGRP (FiberGlass Reinforced Plastics) meeting the BSI 4994:87; that allows underground installations.
www.naldivet.it /Imhoff_en.htm   (176 words)

  
 Imhoff tanks   (Site not responding. Last check: 2007-10-09)
The two chambers of the Imhoff tanks are not connected.
By preventing the mixing of fresh sewage and septic sludge in the same chamber, the Imhoff system�s simple design has eliminated many of the drawbacks of simple single tank septic systems.
The Imhoff tanks are being replaced in sewage treatment by plain sedimentation tanks that use mechanical methods to continuously collect and move the sludge to separate digestion tanks.
www.aboutseptictanks.com /imho.htm   (228 words)

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