Suchergebnisse

ABSTRACT This paper describes the enhancement of biogas production in laboratory‐scale anaerobic digesters (with batch and semi‐continuous operation) using iron‐enriched duckweed as a supplement to the digestion of feedstock. The relationship between the level of enhancement achieved and the retention period of the digesters was also investigated. The trials demonstrated that, in batch digesters, iron‐enriched duckweed significantly improved the rate of microbial succession. Batch digesters receiving no duckweed took 40 days to reach peak methane production compared to 15 days when duckweed was added. In the semi‐continuous digesters, an increase in gas production of about 44% was observed.