The AWALIFT sewage pumping station comprises of a solids separating system to prevent blockages, coupled with high efficiency pumps mounted in a dry well.  The solids separating chamber is flushed out each time the pumps operate to prevent any build-up. The AWALIFT system was developed in Germany some thirty years ago and has continually been developed to achieve optimum performance and reliability.  Some 10,000 pumping stations are installed worldwide, and a life span of 50 years can be assumed

Applications where the AWALIFT will show major benefits:-

• Low flow and high head
• High head where tandem pumping would be selected.  The higher efficiency pumps will cope better than with tandem pumping.
• Low flows - The enclosed system means smaller passage and velocities maintained.  This will prevent solids and fats separating and creating high well maintenance needs.
• Conversion of dry sumps where the sump needs high civils costs to convert to a wet well or where a valve chamber does not currently exist.
• Where a station is in a public area and access is difficult, this may be due to heavy covers or the local situation (in a highway).  The reduced maintenance needs will fit well with this application.
• Where the panel cannot be mounted at the required separation distance from the wet well covers.  The STRATE system will give the physical separation required in the dry sump.

The AWALIFT system will show benefits in terms of:

• Lower running costs (due to high efficiency pumps).
• Lower maintenance costs (e.g. well cleaning can be expected at six monthly frequency at the most).
• Lower maintenance costs (for pump attention due to blockage free operation).
• Lower capital costs for the specific duties listed above.

AWALIFT selection table

AWALIFT planning table 

AWALIFT details

Sewage pumping stations with single STRATE-system pump

The particular feature of all AWALIFT sewage pumping stations is the STRATE-system, the highly reliable combination of centrifugal pump and solids collecting chamber.

How the STRATE-system works

The sewage flows through the inlet into the solids collecting chamber. The solids are retained in this chamber by the separating valves. The solids-free sewage flows through the valves and through the pump into the holding-tank. Once the holding-tank is full the shut-off valve closes the inlet. The level-controlled pump then switches on and pumps the clean sewage through the solids collecting chamber into the pressure-pipe. The solids collecting chamber is, thus, cleared of all residues. In this way the STRATE-system prevents clogging and so keeps the maintenance costs to a minimum.

Note: all sewage pumping stations with the STRATE-system have patented separating valves, licensed by the Institute of Structural Engineering, which are solely produced by STRATE sewage engineering.

Sewage pumping stations with two or more STRATE-system pumps

Here, too, the particular feature is the STRATE-system; the highly reliable combination of centrifugal pump and solids collecting chamber, i.e. EACH pump has its own solids collecting chamber.

How the STRATE-system works

The sewage flows through the inlet, enters a distribution hopper and flows from there into the solids-collecting chambers. The incoming solids are retained here by the separating valves. The solids-free sewage runs through the separating valves, stationary pumps and into the holding-tank. Once the tank is full, the level-controlled operating pump is switched on and pumps the clean sewage through the solids collecting chamber into the pressure-pipe. The chamber is, thus, cleared of all residues. During the pumping stage the incoming sewage flows through the second solids collecting chamber and pump into the holding-tank. The pumps operate alternately. At times of peak load the pumps can be operated in parallel.

The size of the holding-tank and the number of pump and solids chamber units are determined by the incoming flow The STRATE-system with its superior applied technology allows sewage pumping stations to achieve a high efficiency and so to reduce energy requirements with optimum reliability and low maintenance.