Control Emissions Toilets
Mechan is working with its partner, Aquafrisch, to supply and fit waste extraction and cleaning systems for control emission toilets (CET).
These reliable and hygienic products make removing waste from train toilets (chemical or conventional) as clean and easy to manage as possible, discharging effluent safely into a collector tank, recycling scheme or direct into the foul sewer.
When a train needs to be emptied, it is moved onto a track adjacent to the apron where the CET system is based, either indoor or outdoor. Flexible hoses carrying the effluent, potable water, clean water and chemical products are connected to the train, as necessary. The emptying cycle then starts and stops automatically, discharging the effluent and rinsing water into a storage tank for disposal.
Three CET systems are available from Mechan each controlled via touch screens. The most simple is a manual emptying pump that has various suction points. Mechan also supplies an automatic CET system, which sucks waste out through pneumatic valves that open and close in succession, before pumping in water and air for cleaning. The quantity of water used is controlled to suit each type of train.
If the train uses biocides, an automatic system can be designed that follows the process above, but pumps chemicals back into the tank once it has been cleaned.
These low maintenance systems are designed to ensure effluent does not come into contact with mechanical parts in the pumps, minimising wear and blockages. Pure vacuum pumping also maximises efficiency for the full cycle and the pneumatic valves increase pumping time - typically one minute for a toilet tank.
Mechan's CET installation includes:
// Compressor / vacuum pump, equipped with safety and filtration equipment
// Storage tank with level probes and sensors for effluent and dirty water
// Equipment for chemical product preparation
// Emptying and rinsing modules fitted with flexible hoses
// Pipe networks for clean and potable water, effluent, chemical product and compressed air
// Main control panel with automatic shut-off when tank is full
// Overall control station
