Exploration of ammonia stripping coupled adsorption-membrane filtration process for treating kitchen waste biogas slurry

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dc.contributor.authorLin, Shupeng
dc.contributor.authorLyu, Tao
dc.contributor.authorPan, Minmin
dc.contributor.authorHou, Yahan
dc.contributor.authorGuo, Chunchun
dc.contributor.authorChen, Zhihao
dc.contributor.authorDong, Renjie
dc.contributor.authorLiu, Shan
dc.date.accessioned2025-03-12T16:33:44Z
dc.date.available2025-03-12T16:33:44Z
dc.date.freetoread2025-03-12
dc.date.issued2025-06-01
dc.date.pubOnline2025-03-09
dc.description.abstractThe potential contamination of biogas slurry generated from the anaerobic digestion of kitchen waste (KW) poses a considerable challenge to its safe and effective utilization as a fertilizer. To tackle this problem, a novel route termed “AS-BC” was developed, integrating ammonia stripping (AS), biochar adsorption, and ceramic membrane filtration (CMF) for comprehensive pollutant mitigation. A stepwise optimization was carried out, comparing biochar adsorption investigation, the AS process, and the combined AS + CMF process. Results indicated that the AS process possessed the maximum total ammonia nitrogen (TAN) removal of 86.21% at an airflow rate of 40 L/min. The combined AS and CMF process with 0.1 μm membrane had best performance for total phosphorus (TP) with removal efficiencies of 80.45%–87.98%. Under the optimal biochar addition condition of 5 g/L with a particle size of 0.25–0.85 μm, the adsorption pretreatment effectively removed 0.41 g/g of soluble chemical oxygen demand (SCOD), prevented nutrient loss, and substantially enhanced pollutant removal efficiency in the subsequent CMF process. Compared to other routes, the route AS-BC achieved higher total nitrogen (TN), TAN, TP, and SCOD removal efficiency of 91.42%, 91.49%, 89.54%, and 76.34% from the raw biogas slurry, respectively. Moreover, the route AS-BC demonstrated its cost-effectiveness in producing nutrient-rich concentrated slurry suitable for use as fertilizer. The route AS-BC was proved to comprehensively remove various indicators from the KW biogas slurry while generating economically reuse by-products during the membrane filtration process. This study offers valuable insights into the trade-offs between AS performance enhancement and pollutant mitigation, pinpointing essential routes for future research and practical improvements.
dc.description.journalNameEnvironmental Research
dc.description.sponsorshipMinistry of Agriculture and Rural Affairs
dc.description.sponsorshipThe present work was funded by Jinhua City Science and Technology Bureau (2022-3-066) and Key Laboratory for Crop and Animal Integrated Farming, Ministry of Agriculture and Rural Affairs (202306).
dc.identifier.citationLin S, Lyu T, Pan M, et al., (2025) Exploration of ammonia stripping coupled adsorption-membrane filtration process for treating kitchen waste biogas slurry. Environmental Research, Volume 274, June 2025, Article number 121318en_UK
dc.identifier.elementsID566302
dc.identifier.issn0013-9351
dc.identifier.paperNo121318
dc.identifier.urihttps://doi.org/10.1016/j.envres.2025.121318
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23602
dc.identifier.volumeNo274
dc.languageEnglish
dc.language.isoen
dc.publisherElsevieren_UK
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S0013935125005699?via%3Dihub
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject41 Environmental Sciencesen_UK
dc.subject4104 Environmental Managementen_UK
dc.subjectToxicologyen_UK
dc.subject31 Biological sciencesen_UK
dc.subject34 Chemical sciencesen_UK
dc.subjectAmmonia strippingen_UK
dc.subjectBiogas slurryen_UK
dc.subjectBiochar adsorptionen_UK
dc.subjectCeramic membrane filtrationen_UK
dc.subjectKitchen wasteen_UK
dc.titleExploration of ammonia stripping coupled adsorption-membrane filtration process for treating kitchen waste biogas slurryen_UK
dc.typeArticle
dcterms.dateAccepted2025-03-05

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