Imhoff tank

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Imhoff tank:

see septic tankseptic 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
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Imhoff Tank


a structure or tank in which sewage is settled and clarified and the sediment is digested by anaerobic bacteria (seeANAEROBES). Settling takes place in the upper compartment, or story, of the tank, and digestion of the sludge, in the lower compartment. In the Soviet Union, such tanks are called twostory settling reservoirs. Imhoff tanks are often referred to as Emscher tanks, since they were first built in 1906 in the Emscher River region (the Emscher is a tributary of the Rhine in Germany).

Imhoff tank

[′im‚hȯf ‚taŋk]
(civil engineering)
A sewage treatment tank in which digestion and settlement take place in separate compartments, one below the other.
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References in periodicals archive ?
housekeeping and bleed, transportation pumpable sludge, minor maintenance and emergency service of environmental emergencies, video inspection, security service, at the plants operated by Cordar SpA: Cleaning service of the various tanks, pipes, manholes, sewers , Imhoff tanks ineligible to size; as Provincial Prescription: exhaustive cleaning Imhoff tanks on every single pit (1 intervention / year).
Contract notice: Service espurgo sewage networks, imhoff tanks, pumping stations and sewage treatment plants in the province of verona where water veronesi is the manager of the integrated water service.
The task includes emptying of septic tanks, Imhoff tanks, small treatment and sedimentation tanks on all properties within the municipal covered by lborg Supply, Sewerage A / S regulations for discharge of sedimentation tanks.