Print Email Facebook Twitter Evaluation of a full-scale suspended sludge deammonification technology coupled with an hydrocyclone to treat thermal hydrolysis dewatering liquors Title Evaluation of a full-scale suspended sludge deammonification technology coupled with an hydrocyclone to treat thermal hydrolysis dewatering liquors Author Ochs, Pascal (Cranfield University; Thames Water Utilities Ltd.) Martin, Benjamin D. (Thames Water Utilities Ltd.) Germain, Eve (Thames Water Utilities Ltd.) Wu, Zhuoying (Imperial College London) Lee, Po Heng (Imperial College London) Stephenson, Tom (Cranfield University) van Loosdrecht, Mark C.M. (TU Delft BT/Environmental Biotechnology) Soares, Ana (Cranfield University) Date 2021 Abstract Suspended sludge deammonification technologies are frequently applied for sidestream ammonia removal from dewatering liquors resulting from a thermal hydrolysis anaerobic digestion (THP/AD) process. This study aimed at optimizing the operation, evaluate the performance and stability of a full-scale suspended sludge continuous stirred tank reactor (S-CSTR) with a hydrocy-clone for anaerobic ammonia oxidizing bacteria (AMX) biomass separation. The S-CSTR operated at a range of nitrogen loading rates of 0.08–0.39 kg N m−3 d−1 displaying nitrogen removal efficiencies of 75–89%. The hydrocyclone was responsible for retaining 56–83% of the AMX biomass and the washout of ammonia oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) was two times greater than AMX. The solid retention time (SRT) impacted on NOB washout, that ranged from 0.02–0.07 d−1 . Additionally, it was demonstrated that an SRT of 11–13 d was adequate to wash-out NOB. Microbiome analysis revealed a higher AMX abundance (Candidatus scalindua) in the reactor through the action of the hydrocyclone. Overall, this study established the optimal operational envelope for deammonification from THP/AD dewatering liquors and the role of the hydrocyclone towards maintaining AMX in the S-CSTR and hence obtain process stability. Subject DeammonificationHydrocyclonePartial nitrita-tion/anammoxSidestreamThermal hydrolysis process To reference this document use: http://resolver.tudelft.nl/uuid:bac75f0a-9180-4a3d-879f-c44455920776 DOI https://doi.org/10.3390/pr9020278 ISSN 2227-9717 Source Processes, 9 (2) Part of collection Institutional Repository Document type journal article Rights © 2021 Pascal Ochs, Benjamin D. Martin, Eve Germain, Zhuoying Wu, Po Heng Lee, Tom Stephenson, Mark C.M. van Loosdrecht, Ana Soares Files PDF processes_09_00278.pdf 1.22 MB Close viewer /islandora/object/uuid:bac75f0a-9180-4a3d-879f-c44455920776/datastream/OBJ/view