Recuperative thickening for sludge retention time and throughput management in anaerobic digestion with thermal hydrolysis pretreatment

Bibliographische Detailangaben
Veröffentlicht in:	Water environment research : a research publication of the Water Environment Federation. - 1998. - 92(2020), 3 vom: 22. März, Seite 465-477
1. Verfasser:	Li, Baoqiang (VerfasserIn)
Weitere Verfasser:	Romero, Adrian, Wadhawan, Tanush, Tobin, Michael, Manning, Elizabeth, Higgins, Matthew, Al-Omari, Ahmed, Murthy, Sudhir, Riffat, Rumana, De Clippeleir, Haydée
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2020
Zugriff auf das übergeordnete Werk:	Water environment research : a research publication of the Water Environment Federation
Schlagworte:	Journal Article high-rate anaerobic digestion hydrolysis intensification mesophilic recuperative thickening thermal hydrolysis pretreatment Biofuels Sewage

Beschreibung
Zusammenfassung:	© 2019 Water Environment Federation. This study evaluated the application of recuperative thickening (RT) to enhance anaerobic digestion (AD) performance for AD systems with thermal hydrolysis pretreatment (THP). RT was applied for two different reasons: (a) for increasing the sludge retention time (SRT) to degrade slowly hydrolyzable materials more efficiently and (b) for maintaining SRT at decreased hydraulic retention time (HRT) thus showing potential for increased AD throughput rates. A SRT increase from 15 to 30 days by RT application did not improve AD performance or hydrolysis rates significantly as 15-day SRT was already a factor 2 higher than the estimated washout SRT. When applying RT to increase throughput rates (HRT of 7 days) while maintaining 15-day SRT, no negative impact on biogas production or hydrolysis kinetics was observed. It was estimated that RT application on THP digesters can increase digester throughput by 100% and thus show clear potential for further AD intensification. PRACTITIONER POINTS: Increased SRT from 15 to 30 days through recuperative thickening application did not improve biogas production. A lower required minimum SRT (6-7 days) was estimated in THP-AD systems compared to conventional AD. Operation at decreased HRT by RT application resulted in similar AD performance under constant organic loading rates. A 100% increase in throughput rates can be applied using RT without decreasing AD performance
Beschreibung:	Date Completed 06.03.2020 Date Revised 06.03.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1554-7531
DOI:	10.1002/wer.1230