current/voltage meter (this is where the electrical current and voltage are
measured)
ion-selective membranes
electrodes
In the stack, sodium and other fertilizers are transferred to the wastewater.
The wastewater flows back into the wastewater tank.
2.2.2
Short flush with fresh water
The drain water circuit performs a short flush with fresh water using water from the
fresh water tank. This water passes through the NoNa
+
and is then fed into the
wastewater tank in order to fill it. Acid is also dosed into the wastewater tank. This
acid prevents limescale buildup in the stack.
Figure 2-4:
Schematic diagram of short flush with fresh water
Fresh water (tap water) is fed into the fresh water tank.
The drain water pump draws fresh water from the fresh water tank.
Fresh water passes through the filter bypass valve around the filters (to
minimize the amount of flush water used).
The water flows into the stack via both valves.
Some of the water leaves the NoNa
+
and runs into the drain water tank.
Some of the water runs into wastewater tank.
Acid is pumped from the tank used for continuous (acid) cleaning, and is fed
into the wastewater tank. This is done in preparation for continuous (acid)
cleaning with wastewater during the purification process.
2.2.3
Discharging wastewater
When the wastewater tank is full, the float signals that it needs to be emptied. The
wastewater is discharged after the purification process.
NoNa
+
13
Summary of Contents for NoNa+
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