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Pos. Module
Description
The standard UF module is included in all possible configurations of an AQpure system. The most basic
configuration for an AQpure system comprises only this module. It comprises all components relevant for
the ultrafiltration (UF) process and the basic self-cleaning tasks. If no solar package module is used, the
system includes an Uninterruptible Power Supply (UPS) to put the system into a safe state in case of
power failure.
The main components of this module are:
• one UF membrane
• one feed pump
• one backwash pump
1
Standard UF
• one internal water tank
• four motor valves
• three pressure sensors
• two flow sensors
• one temperature sensor
• one UPS (only if no solar package module is used)
• one control PLC
• one aluminium frame.
An air scouring module can be added to the system. This module serves two different purposes.
One is the air scouring which is used to enhance the efficiency of the UF membrane backwash. The air
scouring module sends air bubbles through the UF membrane as an additional step of the UF membrane
backwash. The air bubbles move from the bottom to the top of the UF membrane. In their movement they
help to loosen the fouling of the membrane. See section:
2
Air scouring
The other purpose of the air scouring module is to test the integrity of the UF membrane. This is done with
a Pressure Decay Test (PDT). During a PDT the UF membrane is pressurised with air. The pressure
inside the UF membrane is held and monitored. If the pressure decreases more than expected within a
certain period of time, it indicates broken fibres inside the UF membrane. See section:
test.
The main component of this module is an air compressor.
A UV disinfection module can be added to the system. The UV light is turned on, when production runtime
starts in the morning, and is turned off, when production runtime stops in the evening. For details on
production runtime, see section:
activated.
The UV lamp needs 3 minutes to warm up before it reaches the light intensity that has the required
disinfection performance. During warm-up time, no tapping of water is possible.
A UV light intensity sensor monitors the UV light. The value of the UV intensity is displayed in % at the UV
3
UV disinfection
system controller, which is installed at the lower backside of the AQpure control cabinet. Low UV intensity
triggers an alarm that stops the system.
The main components of this module are:
• one UV lamp
• one UV intensity sensor
• one UV sensor controller
• one solenoid valve.
The AQpure system is powered by single-phase 220-240 VAC power. The power source for the system
can either be an external power source provided by the operating company or it can be a solar package
module, or a combination of both. The solar package module does not influence the Process and
Instrumentation Diagram (PID) of the system. The solar module does however influence the power
management of the system. See section:
4
Solar package
are:
• one breaker box for the PV array connection
• one breaker box between batteries and bi-directional inverter
• one bi-directional inverter including a solar charger
• two batteries.
The purpose of the distribution module is to provide the operating company with a precise measurement
for the water volume that has been distributed from the system. A distribution module is mandatory, if the
activated carbon filter module is part of the system or if the external tank setup 2 is used. See section:
6.5.1 External tank setup
5
Distribution
cleaning tasks. The main components of this module are:
• one water meter
• one solenoid valve.
The chlorination module offers the possibility to dose sodium hypochlorite solution into the clean water
flow. Furthermore, it provides the possibility to perform Chemically Enhanced Backwashes (CEB), where
sodium hypochlorite solution is added while the UF membrane is backwashed. The main components of
6
Chlorination
this module are:
• one dosing pump
• one chemical tank with level switch.
6.6.5
Production. The UV light is also turned off, if a system alarm is
6.7 Power
management. The main components of this module
options. The system must be able to close the distribution during automatic
6.6.9 Backwash of UF
membrane.
6.6.15 Integrity
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