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For this reason, the development of downstream processing technologies is required to better manage ammonia and carbon dioxide emissions during the storage and land application of the resulting soil organic amendment. The present work investigated classical distillation as a technology for valorizing ammoniacal nitrogen (NH4+-N) in anaerobic digestate. The results implied that the direct isolation of ammonium bicarbonate (NH4HCO3) was possible when applying the reactive distillation to the food waste digestate (FWD) with a high content of NH4+-N, while the addition of antifoam to the agrowaste digestate (AWD) was necessary to be able to produce an aqueous solution of NH4HCO3 as the distillate. The reason was that the extraction of NH4HCO3 from the AWD required a higher temperature (&gt;95 \u00b0C) and duration (i.e., steady state in batch operation) than the recovery of the inorganic fertilizer from the FWD. The titration method, when applied to the depleted digestate, offered the quickest way of monitoring the reactive distillation because the buffer capacity of the distillate was much higher. The isolation of NH4HCO3 from the FWD was attained in a transient mode at a temperature below 90 \u00b0C (i.e., while heating up to reach the desired distillation temperature or cooling down once the batch distillation was finished). For the operating conditions to be regarded as techno-economically feasible, they should be attained in the anaerobic digestion plant by integrating the heat harvested from the engines, which convert the biogas into electricity.<\/jats:p>","DOI":"10.3390\/bioengineering11111152","type":"journal-article","created":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T04:07:09Z","timestamp":1731902829000},"page":"1152","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Classical Batch Distillation of Anaerobic Digestate to Isolate Ammonium Bicarbonate: Membrane Not Necessary!"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6583-4626","authenticated-orcid":false,"given":"Alejandro","family":"Moure Abelenda","sequence":"first","affiliation":[{"name":"School of Engineering, Lancaster University, Lancaster LA1 4YW, UK"},{"name":"Soil Quality Assessment Research Group, Department of Soil Science and Agricultural Chemistry, Universidade de Santiago de Compostela, Avenida de Vigo, s\/n, 15782 Santiago de Compostela, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5634-955X","authenticated-orcid":false,"given":"Jonas","family":"Baltrusaitis","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca Hall, 111 Research Drive, Bethlehem, PA 18015, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"eadh2458","DOI":"10.1126\/sciadv.adh2458","article-title":"Earth beyond Six of Nine Planetary Boundaries","volume":"9","author":"Richardson","year":"2023","journal-title":"Sci. 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