Title

Pilot-scale operation experience of anaerobic Co-digestion for possible full scale implementation

RIS ID

135858

Publication Details

Wickham, R., Xie, S., Galway, B., Bustamante, H. & Nghiem, L. D. (2019). Pilot-scale operation experience of anaerobic Co-digestion for possible full scale implementation. International Biodeterioration and Biodegradation, 142 137-142.

Abstract

Anaerobic co-digestion of sewage sludge with four beverage wastes (namely beer, soft drink, fruit juice, and wine)was evaluated using a dedicated pilot research plant. Temporal variation in the sludge's organic content highlighted the importance of using a mono-digestion control reactor for a systematic comparison with co-digestion. Results indicate that chemical oxygen demand (COD)is a better parameter compared to volatile solids (VS)for determining the organic loading rate during co-digestion with beverage waste that contain solubilised organic carbon. In this study, all beverage wastes investigated here (with the exception of wine)were suitable for co-digestion. H 2 S content in biogas decreased during co-digestion, possibly due to the dilution effect by the additional biogas generated from sulphur-lean organic rich waste. Results from this study show that the organic content in most beverage waste can be readily and completely converted to biogas. At 10% substrate addition (v/v)beer, soft drink and juice addition did not observably affect total COD and VS in the digestate, whilst increasing biomethane production relative to the control by 39, 41 and 64% respectively. Furthermore, the interchanging of co-substrates did not result in any observable impact on digestion performance. Further investigation is recommended to ascertain the low performance of wine waste co-digestion with sewage sludge.

Grant Number

ARC/LP150100304

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