Pre-treatment

Septic tanks

Septic tanks are used as a pre-treatment of mixed wastewater coming from civil buildings (where there is no separation between grey water originating from kitchens, washing machines, washbasins, showers, etc., and black water originating from W.C.), before being discharged into the public sewage system or upstream of an appropriate purification plant (activated sludge system, sub-irrigation, trickling filter, etc.).
Septic tanks are decantation tanks suitable for sedimentation processes; in stillness condition, due to gravity, heavier solids settle to the bottom of the tank, while lighter materials (oils, greases and low density solids) float to the upper part.
It’s also possible to install two or three septic tanks in line, in order to highly improve the purifying efficiency of the system.
These products may be integrated with treatments allowing to improve the general purification efficiency, depending on incoming wastewater features and final discharge type.
The septic tanks are particularly suitable to small and medium households communities, as they allow the following advantages:

• They simplify the treatment process, by consequently reducing the number of parts, thus the necessary investment.
• They are very easy to manage and maintain.
• No electric consumption.

Biological Imhoff tanks

Biological Imhoff tanks are commonly used as a pre-treatment of black water coming from civil buildings (originating from W.C.), before being discharged into the public sewage system or upstream of an appropriate purification plant (sub-irrigation, trickling filter, etc.).

Inside biological Imhoff tanks there are two clearly separated compartments: a superior one for sedimentation and an inferior one for decanted sludge storage and anaerobic digestion.

The sedimentable suspended solids are trapped into the sedimentation compartment and precipitate into the inferior storage and digestion compartment, passing through the opening which connects the two zones; there, all organic substances undergo an anaerobic fermentation, with the consequent stabilization of produced sludge.

These products may be integrated with treatments allowing to improve the general purification efficiency, depending on incoming wastewater features and final discharge type.

The biological Imhoff tanks are particularly suitable to small and medium households communities, as they allow the following advantages:

• They simplify the treatment process, by consequently reducing the number of parts, thus the necessary investment.
• Production of a few quantity of sludge, having a good biological stability.
• They are very easy to manage and maintain.
• No electric consumption.

Grease separators

Grease separators are used as a pre-treatment of grey water coming from civil buildings (originating from kitchens, washing machines, washbasins, showers, etc.), before being discharged into the public sewage system or upstream of an appropriate purification plant (activated sludge system, sub-irrigation, trickling filter, etc.).

Greases separation is a physical process of removal of all the substances having a specific weight inferior to wastewater, typical of discharged waters originating from kitchens, restaurants and canteens.

Greases removal is necessary, as they may cause serious troubles in the following treatment steps, like aerobic biological process, anaerobic digestion, decantation and sewage lifting.

These products may be integrated with treatments allowing to improve the general purification efficiency, depending on incoming wastewater features and final discharge type.

The grease separators are particularly suitable to small and medium households communities, as they allow the following advantages:

• They simplify the treatment process, by consequently reducing the number of parts, thus the necessary investment.
• They are very easy to manage and maintain.
• No electric consumption.