AQQA® is the next generation membrane plate filter for wastewater and drinking water.

AQQA® is based on the proven design of a plate filter, but adds new, innovative features.

The unique design of AQQA®: The base plate and the membrane are connected together to form a solid Unit. The resulting sandwich Plate is extremely robust and backflushable like a Hollow fiber.


Updated design features:

Full backflush capability up to 0,35 bar:

  • less membrane area required due to higher output per m²: less investment and smaller space requirements

  • easier Maintenance with cleaning in the air: the filters stay in the system

  • automatic recovery clean with intermediate backflush intervalls including cleaning liquids. Reduced cost for maintenance

  • no downtime of the system

  • higher and flexible output, possibility to "overflux" the system

New, innovative Membrane:

  • increased membrane porosity per square inch results in higher flux rates

  • proven retention rate of >99,9999% for bacteria

  • highest hygienical security and water quality

  • membrane is delivered dry and can dry out

Rigid and straight plates with a constant gap:

  • no loss of filtration area, plates cannot touch and do not stick together

  • higher resistance to clogging with fibres, no manual cleaning, less prefiltration requirements

  • very efficient mechanical cleaning with high shearing forces on the membrane surface lead to less maintenance and lower energy consumption

  • high packing density for a small foot-print and smaller membrane tanks

 Modular cubical design of the filter frame:

  • easy integration into the tank and the system

  • very efficient aeration and and upstream channel design for less maintenance and lower energy consumption

  • extremely robust design

  • single filter plates can be exchanged

Cleaning in the air

  • completely automized procedure

  • the membrane tank is emptied but the AQQA®-filter remains in place

  • the AQQA®-filter is backflushed with a cleaning liquid. The cleaning liquid will soak the membrane surface through the pores and removes the remains of dirt on the membrane surface

  • the membrane is cleaned and the membrane tank can be refilled

  • the filter starts operaing again

Comparison Chart


AQQA conventional plate
flexible plate
hollow fibre
max. permeability [l/m²hbar]
1400 630 286 240
nominal pore size [µm]
< 0,04
< 0,4
< 0,04
< 0,04
initial bacterial removal log steps
6 log
low pressure loss on the filtrate side
x x
even pressure distribution on the filtrate side
x x
membrane is fixed on the complete surface
membrane is drying resistant
x x x
filterelements can not touch each other
x x
not vulnerable to clogging with fibres
x x
required screening
2 mm punch hole
2 mm punch hole
2 mm punch hole
0,75 mm punch hole
backflush capability, pressure [mbar]
350 0 150 250
robustness of plate, resp. fibre
high medium low medium
ph-range 1-12 2-11 5-9,5
max. operating temperature [°C]
50 40 40 40
exchange of single sheet possible
x x
energy and/or chemical cleaning requirements
low high medium medium
medium bubble aeration
defined gap for the air bubbles and the sludge
x x
flat surface aeration
x x
modular system with ISO/EURO format
x x x
easy transport and installation on site
x x x