Spatial monitoring of hydrolysis in a plug-flow bioreactor:a support for flexible operation?  

作　　者：Theresa Menzel Peter Neubauer Stefan Junne 

机构地区：[1]Chair of Bioprocess Engineering,Institute of Biotechnology,Technische Universität Berlin,Ackerstraße 76,ACK 24,13355 Berlin,Germany [2]Department of Chemistry and Bioscience,Aalborg University Esbjerg,Niels Bohrs Vej 8,6700 Esbjerg,Denmark.

出　　处：《Bioresources and Bioprocessing》2024年第1期304-315,共12页生物资源与生物加工(英文)

基　　金：financially supported by the Fachagentur für Nachhaltige Rohstoffe e.V.(FNR),grant number 22039818.

摘　　要：Hydrolysis at changing hydraulic retention time,recirculation,bedding straw content in the feed,bioaugmentation and the impact of those changes on gradient formation in the liquid phase in plug-flow reactors(PFRs)was examined.The pH-value,conductivity and oxidation-reduction potential(ORP)were monitored at three spots along the PFRs to study potential correlations to process performance during a total process time of 123 weeks.The on-line monitoring showed good correlations to acidogenesis:namely,the pH and ORP to the acidification,to butyric(and lactic)acid concentration and to the acid yield.The ORP(measured at the inlet)showed the most stable correlation to acidogenesis under dynamic operation,while the conductivity(at the outlet)correlated to the acid concentration in dependence on the feedstock.Multiple measurement spots as used in this study allow to gain more information about acidogenic fermentation than a single spot,simplifying process control and automation attempts with recalcitrant feedstock.

关 键 词：Multiposition monitoring Anaerobic digestion Bedding straw Thin-sludge recirculation Hydraulic retention time 

分 类 号：X70[环境科学与工程—环境工程]