PUB, Singapore’s national water agency, and Anaergia Pte Ltd (Anaergia) announced on Friday the commencement of Singapore’s first project aimed at producing more biogas for electricity generation by co-digesting used water sludge and food waste.
In a statement, PUB said used water sludge from the Ulu Pandan Water Reclamation Plant (WRP) will be mixed with food waste collected from the Clementi district and treated in a co-digestion demonstration facility.
The co-digestion plant can treat up to 40 tons of combined food waste and used water sludge.
It will adopt the OmnivoreTM process patented by Anaergia, which makes use of anaerobic digestion, a biological process that breaks down organic materials without requiring oxygen to produce biogas.
The National Environment Agency will conduct a district-level pilot in Clementi for the collection of source-segregated food waste from educational institutions, hospitals and camps for co-digestion at the demonstration plant, which is under construction and will be completed by September 2015.