IMHOFF TANKS IN POLYETYLENE

IMHOFF TANKS IN POLYETHYLENE

EQUIVALENT INHABITANTS

from 450 up to 35000 litres (in particular, for 3 to 8 Equivalent Inhabitants or Persons).

ACCESSORIES

Extension PRO X400 PRO X200 – Telescopic manhole CHI Y600-400 CHI Y 400-200 – Fiscal cockpit

VERSION

standard, special

VIDEO

Video

Vasche Imhoff
Vasche Imhoff Vasche Imhoff In Polietilene

DESCRIPTION

The imhoff tank is a cistern that has the function of favoring the sedimentation of the coarse solids present inside the sewage that remain on the bottom of the tank and, through the anaerobic digestion, to break down an aliquot of BOD. It’s composed of two hydraulically communicating compartments, the first of sedimentation and the second of digestion of organic substances. The imhoff tanks are made of plastic and have 2 internal sectors, one called digester, and the other sedimentator. The imhoff tanks are an integral part of a sewage treatment plant from residential homes or industrial activities.

The sewage from the toilets is treated in the imhoff tank by settling the sludge on the bottom. Solid parts are discharged from the upper area which is called digester due to the inclination of the walls. The so-called cold anaerobic digestion takes place at the bottom of the tank. It is preferable to insert, upstream of the imhoff tank, a degreaser for the eventual removal of the oily part coming from the kitchens. The pits are sized assuming 200 liters per inhabitant equivalent and an organic load of Bod5 equal to 60 grams per inhabitant equivalent. For the volume of sedimentation we have instead 40-50 liters/ae and for the digestion 100-120 liters/ae.

Imhoff tanks need one or two purges per year, depending on the use and number of inhabitants (people). Very resistant thanks to their reinforcement ribs. The right choice of the imhoff pit is given by the final delivery: sewerage or sub-irrigation or directly in drainage on tab.4 (directly on the ground).

The choice of graves imhoff is determined by mandatory rules in the particular regions. Usually national transposition rules are followed.

Large imhoff tanks intended for communities of 100 equivalent inhabitants have a horizontal development and are divided into two hydraulically communicating zones. The imhoff pits guarantee a purification of BOD5 equal to or greater than 30%, COD greater than 30% and suspended solids greater than 50%.

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