Nitrogen upcycling and carbon capture from food waste through dark fermentation coupled with microalgae and hydrogen oxidising bacteria cultivation
食品廃棄物からの窒素アップサイクルと炭素回収：暗発酵と微細藻類・水素酸化細菌共培養の統合プロセス (AI 翻訳)
Raffaele Manzo, Stefano Papirio, Giovanni Esposito, José de Jesús Montoya Rosales, Octavio García Depraect, Silvio Matassa, Raúl Muñoz Torre
🤖 gxceed AI 要約
日本語
食品廃棄物の暗発酵により生成された水素・二酸化炭素を含むバイオガスと、液体発酵物からストリッピングで回収した窒素を、微細藻類（Chlorella vulgaris）と水素酸化細菌（Cupriavidus necator）の共培養に供給し、タンパク質豊富な単細胞タンパク質（SCP）を生産する統合システムを提案。実験結果から炭素回収と窒素アップサイクルの可能性を示す一方、アンモニアストリッピングが主要なボトルネックであると特定。
English
This study proposes an integrated system combining dark fermentation of food waste with a co-culture of microalgae and hydrogen-oxidizing bacteria for single-cell protein production, achieving carbon capture and nitrogen upcycling. The highest biomass concentration reached 0.78 g VSS/L under test conditions, with protein content of 31.6% containing eight essential amino acids. Ammonia stripping was identified as the main bottleneck for optimization.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では食品廃棄物の資源化が進んでおり、本技術はCCUSとタンパク質生産の融合として注目される可能性がある。ただし実験室規模であり、実用化にはさらなる研究が必要。
In the global GX context
This work contributes to the global push for circular bioeconomy by demonstrating a pathway for carbon capture and nitrogen upcycling from waste streams. It aligns with CCUS and alternative protein research, though at a low technology readiness level.
👥 読者別の含意
🔬研究者:Provides a proof-of-concept for integrating dark fermentation, ammonia stripping, and algal-bacterial co-culture for SCP production, with clear identification of process bottlenecks.
🏢実務担当者:Offers early-stage insights for waste-to-protein systems, but significant scale-up and optimization are needed before industrial application.
📄 Abstract（原文）
The production of alternative protein sources such as single-cell protein (SCP) is expected to help mitigate the adverse environmental impacts of current feed and food production methods. This mitigation is especially relevant when SCP production is integrated with a carbon capture and nitrogen recovery system from nitrogen-rich wastes. The present study investigated a novel integrated approach to upcycle both the biogas containing hydrogen and carbon dioxide produced from the dark fermentation (DF) of food waste, and the nitrogen recovered through stripping from the liquid fermentate into protein-rich biomass. SCP was produced using a co-culture of the microalga Chlorella vulgaris and the hydrogen-oxidising bacterium Cupriavidus necator . The fermentate, characterised by an ammonium concentration of around 170.0 ± 36.2 mg N-NH 4 + /L, was transferred from a continuous 1 L fermenter to a 2 L stripping column, where an NH 4 + -N removal efficiency of 24 % was achieved. The NH 3 -laden air flow was supplied to the algal-bacterial culture growing in a 4 L column photobioreactor (PBR). The highest biomass concentration achieved in the PBR was 0.78 ± 0.02 g VSS/L under test conditions, while it reached up to 1.51 ± 0.04 g VSS/L under supply of chemical nitrogen salts and synthetic biogas. The algal-bacterial culture contained 31.6 ± 0.2 % protein/VSS under test conditions and eight of the nine essential amino acids were detected. Overall, the findings of this study highlight the potential of the proposed DF-microbial conversion system for carbon capture and nitrogen upcycling, while identifying ammonia stripping as the main bottleneck for future optimisation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.biombioe.2026.109792first seen 2026-07-16 05:22:14
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