Print Email Facebook Twitter Impact of solids retention time on the biological performance of an AnMBR treating lipid-rich synthetic dairy wastewater Title Impact of solids retention time on the biological performance of an AnMBR treating lipid-rich synthetic dairy wastewater Author Szabo Corbacho, M. (TU Delft Sanitary Engineering; IHE Delft Institute for Water Education; Laboratorio Tecnológico del Uruguay) Pacheco-Ruiz, Santiago (Veolia Water Technologies) Míguez, Diana (Laboratorio Tecnológico del Uruguay) Hooijmans, Christine Maria (IHE Delft Institute for Water Education) Garcia, H. (IHE Delft Institute for Water Education) Brdjanovic, Damir (TU Delft BT/Environmental Biotechnology; IHE Delft Institute for Water Education) van Lier, J.B. (TU Delft Sanitary Engineering; IHE Delft Institute for Water Education; Laboratório Tecnologico del Uruguay - Tecnologia de Irradiacion) Date 2019 Abstract In this study, the impact of applied solids retention time (SRT) on the biological performance of an anaerobic membrane bioreactor (AnMBR) treating synthetic dairy wastewater with high lipid content was assessed. Two side-stream AnMBR systems were operated at an SRT of 20 and 40 days (R20 and R40, respectively), equipped with an inside-out tubular membrane operated in cross-flow mode under full-scale operational conditions, i.e. crossflow velocity, transmembrane pressure, membrane flux. Successful operation was achieved and removal efficiencies of both reactors were up to 99% applying an organic loading rate (OLR) of 4.7 g COD L−1 d−1. No precipitation of lipids was observed throughout the operational period, keeping the lipids available for the anaerobic degradation. Long chain fatty acid (LCFA) accumulation was very modest and amounted 148 and 115 mg LCFA-COD per gram of volatile suspended solids (VSS) for R20 and R40, respectively. At an SRT of 40 days, a slightly better biological conversion was obtained. Periodically performed specific methanogenic activity (SMA) tests showed stabilization of the SMA for R40 sludge, whereas for R20 sludge the SMA continued to decrease. This study revealed a more stable reactor performance operating the AnMBR at an SRT of 40 days compared to 20 days. Subject Anaerobic membrane bioreactordairy wastewaterlipidslong chain fatty acidssludge retention time To reference this document use: http://resolver.tudelft.nl/uuid:7d64d781-2944-49e0-b2fa-96e9a7837021 DOI https://doi.org/10.1080/09593330.2019.1639829 Embargo date 2020-07-11 ISSN 0959-3330 Source Environmental Technology, 42 (2021) (4), 597-608 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 M. Szabo Corbacho, Santiago Pacheco-Ruiz, Diana Míguez, Christine Maria Hooijmans, H. Garcia, Damir Brdjanovic, J.B. van Lier Files PDF Szabo_et_al_2019_Impact_o ... echnol.pdf 555.45 KB Close viewer /islandora/object/uuid:7d64d781-2944-49e0-b2fa-96e9a7837021/datastream/OBJ/view