Thermophilic (55 °C) and hyper-thermophilic (70 °C) anaerobic digestion as novel treatment technologies for concentrated black water

Thermophilic and hyper-thermophilic anaerobic digestion (AD) are promising techniques for the treatment of concentrated black water (toilet fraction of domestic wastewater collected by low flush volume toilets; BW), recovery of nutrients and simultaneous pathogen removal for safe recovery and reuse of those nutrients. This study showed that thermophilic AD (55 °C) of concentrated BW reaches the same methanisation and COD removal as mesophilic anaerobic treatment of BW (conventional vacuum toilets) and kitchen waste while applying a higher loading rate (OLR) (2.5–4.0 kgCOD/m3/day). With a retention time of 8.7 days, and an OLR of >3 kgCOD/m3/day, COD removal of 70% and a methanisation of 62% (based on CODt) was achieved during thermophilic AD. Hyper-thermophilic (70 °C) reached lower levels of methanisation (38%). Start-up time of thermophilic AD was 12 days. And during thermophilic AD, a shift from acetoclastic methanogenesis towards syntrophic acetate oxidation was observed.

Bibliographic Details

Main Authors:	Moerland, Marinus J., Castañares Pérez, Laura, Ruiz Velasco Sobrino, Maria E., Chatzopoulos, Paraschos, Meulman, Brendo, de Wilde, Vinnie, Zeeman, Grietje, Buisman, Cees J.N., van Eekert, Miriam H.A.
Format:	Article/Letter to editor biblioteca
Language:	English
Subjects:	Black water, ERP127322, Hyper-thermophilic anaerobic digestion, Methanogenesis, New sanitation, PRJEB43366, Resource recovery, Thermophilic anaerobic digestion,
Online Access:	https://research.wur.nl/en/publications/thermophilic-55-c-and-hyper-thermophilic-70-c-anaerobic-digestion
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