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Updated: Jul 5, 2026

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
Published on: July 13, 2012
Anaerobic treatment as a core technology for energy, nutrients and water recovery from source-separated domestic
Grietje Zeeman1, Katarzyna Kujawa, Titia de Mes
1Department of Agrotechnology and Food Sciences, Sub-department of Environmental Technology, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands. grietje.zeemen@wur.nl
Abstract:
Based on results of pilot scale research with source-separated black water (BW) and grey water (GW), a new sanitation concept is proposed. BW and GW are both treated in a UASB (-septic tank) for recovery of CH4 gas. Kitchen waste is added to the anaerobic BW treatment for doubling the biogas production. Post-treatment of the effluent is providing recovery of phosphorus and removal of remaining COD and nitrogen. The total energy saving of the new sanitation concept amounts to 200 MJ/year in comparison with conventional sanitation, moreover 0.14 kg P/p/year and 90 litres of potential reusable water are produced.
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