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A critical review of ammonia recovery from anaerobic digestate of organic wastes via stripping

Tijdschriftbijdrage - Tijdschriftartikel

Anaerobic digestion is a well-established technology which valorises organic wastes toproduce renewable energy as biogas. The ammonia released during this process canbe inhibitory if it exceeds the threshold concentration. Additionally, ammonia is aharmful environmental pollutant and also a renewable source of energy, thusestablishing a need for the recovery of ammonia. Gas-liquid stripping is one suchwidely researched technology to recover ammonia from wastewaters. However, therehave not been any reviews focusing solely on the application of stripping to recoverammonia from the anaerobic digestate of organic wastes. This study reviews thecurrent state of research in this field, focusing on the factors affecting the ammoniarecovery, stripping column designs and linking of an anaerobic digester to a strippingcolumn. An overview of the work done on the modelling of the ammonia stripping fromdigestate is also included. This review offers a direction for further research in this field;namely experimental and modelling studies on i) the effect of digestate composition onammonia recovery and ii) the effect of stripping gas on ammonia removal.
Tijdschrift: Renewable and Sustainable Energy Reviews
ISSN: 1364-0321
Volume: 143
Aantal pagina's: 14
Jaar van publicatie:2021