Anaerobic Co-digestion of Brown Water and Food Waste for Energy Recovery

Jun Wei Lim (1)

1 Nanyang Technological University [Singapour]

The anaerobic digestion of brown water (BW), food waste (FW) and their mixture (MW) in batch digesters was evaluated under mesophilic conditions. BW collected from separating toilets and FW are high strength organic substrates that can be treated in a decentralized reactor via anaerobic digestion. The bio-methane potential of these substrates at different feed/inoculum ratios (F/Is) was studied using 100-mL serum bottles and biogas and methane production, pH and VS reductions were measured periodically to determine the extent of substrate degradation. The feasibility of co-digestion was also investigated to determine if further improvement of biogas yield could be achieved. Preliminary results suggested that BWs and FWs are potential substrates for biogas production. Brown water appeared to be the most biodegradable substrate in this study and its biogas yield was inhibited by the addition of food waste.

Mots clés: Anaerobic digestion; food waste; brown water; biogas; co-digestion

Domaines: Environnement et Société

Jun Wei Lim. Anaerobic Co-digestion of Brown Water and Food Waste for Energy Recovery. 11th edition of the World Wide Workshop for Young Environmental Scientists (WWW-YES-2011) - Urban Waters: resource or risks?, Jun 2011, Arcueil, France. ⟨hal-00607958⟩