Anaerobic digestion of soft drink beverage waste and sewage sludge

Authors

John Wickham, University of WollongongFollow
Sihuang Xie, University of WollongongFollow
Brendan R. Galway, Sydney WaterFollow
Heriberto A. Bustamante, Sydney WaterFollow
Long D. Nghiem, University of Technology, SydneyFollow

RIS ID

127356

Publication Details

Wickham, R., Xie, S., Galway, B., Bustamante, H. & Nghiem, L. D. (2018). Anaerobic digestion of soft drink beverage waste and sewage sludge. Bioresource Technology, 262 141-147.

Abstract

Soft drink beverage waste (BW) was evaluated as a potential substrate for anaerobic co-digestion with sewage sludge to increase biogas production. Results from this study show that the increase in biogas production is proportional to the increase in organic loading rate (OLR) rate due to BW addition. The OLR increase of 86 and 171% corresponding to 10 and 20% BW by volume in the feed resulted in 89 and 191% increase in biogas production, respectively. Under a stable condition, anaerobic co-digestion with BW did not lead to any significant impact on digestate quality (in terms of COD removal and biosolids odour) and biogas composition. The results suggest that existing nutrients in sewage sludge can support an increase in OLR by about 2 kg COD/m³ /d from a carbon rich substrate such as soft drink BW without inhibition or excessive impact on subsequent handling of the digestate.

Grant Number

ARC/LP150100304