Zero Water Concept (ZWC)
Plate seperator
Particles in the water coming from the mechanical filter settles in the plate separator and is pumped out for external wastewater treatment (WWT). The cleaned water runs to the de-nitrification system where the remaining fine particles act as food source for nitrifying bacteria.
De-nitrification system
Bacteria transform nitrate into nitrogen gas by the use of a carbon source such as methanol. Increased alkalinity through this process reduces the need for adding alkalinity when compared to basic RAS
Phosphorous system
The system facilitates precipitation of dissolved phosphorous and sedimentation of fine particles and other substances that would otherwise accumulate in the system.
Wastewater treatment (WWT)
The beltfilter dewaters sludge coming from the ZWC plate separator to a dry matter content of around 10%. Sludge at 10% dry matter is often used for soil improvement in agriculture or a source in biogas production. A decanter centrifuge can be added to thicken the sludge up to 30% to reduce the volume of sludge. Reject water will need to be discharged according the local consent levels.
Belt filter
Decanter centrifuge
Sludge 10-30% DM and reject water
