Spatiotemporal decoupling of microbial electrolysis for continuous wastewater treatment and high-efficiency solar hydrogen production.
連続的な排水処理と高効率太陽水素生成のための微生物電気分解の時空間的デカップリング (AI 翻訳)
Guifeng Li, Di Zhang, Yang Yang, Zhida Li, Nanqi Ren, Lu Lu
🤖 gxceed AI 要約
日本語
太陽光駆動の微生物光電気化学セル（MPEC）は、排水処理と水素生成を同時に行うが、断続的な日照や速度差が課題である。本研究では、電子結合プロトンバッファ（ECPB）を用いたデカップリングシステムを提案し、微生物酸化と水素生成を分離することで、実排水処理でCOD除去率75%以上、エネルギー収率96.7%を達成した。このシステムは従来のMPECと比較して水素生成速度が4.8倍、資本支出が79%削減され、高純度水素が得られた。持続可能なグリーン水素生成と排水処理の効果的な戦略を示している。
English
This paper proposes a spatiotemporally decoupled microbial photoelectrochemical cell (MPEC) using an electron-coupled-proton buffer (ECPB) to separate microbial oxidation and hydrogen production. The system achieved over 75% COD removal and 96.7% energy yield from real wastewater. Compared to conventional coupled MPEC, it showed a 4.8x higher H2 production rate, 79% lower capital expenditure per unit H2, and higher purity. The decoupled MPEC offers a flexible strategy for renewable energy utilization and sustainable green hydrogen generation.
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
日本は水素社会実現を目指しており、本研究成果は排水処理とグリーン水素生成の同時実現に寄与する。特に、変動する再生可能エネルギーを柔軟に利用できる点は、日本における水素製造の課題解決に繋がる可能性がある。
In the global GX context
This paper addresses key challenges in solar-driven hydrogen production from wastewater, offering a decoupled approach that improves efficiency and reduces costs. It contributes to the global effort for sustainable hydrogen production and water treatment, relevant for circular economy and energy transition.
👥 読者別の含意
🔬研究者:Presents a novel decoupling strategy for microbial electrolysis that improves hydrogen production efficiency and capital cost; researchers in bioelectrochemical systems and renewable hydrogen should note the design.
🏢実務担当者:Demonstrates potential for on-site wastewater treatment and hydrogen generation, but scalability would need further development; relevant for wastewater treatment plants and hydrogen producers.
🏛政策担当者:Aligns with policies promoting green hydrogen and circular water use; could inform future R&D funding priorities.
📄 Abstract（原文）
Solar-driven microbial photoelectrochemical cells (MPECs) enable simultaneous wastewater treatment and renewable H2 production but face practical challenges from intermittent solar irradiation, slow microbial oxidation kinetics that limit coupled electrochemical H2 evolution, and low H2 purity. Here, we propose a decoupled MPEC system mediated by an electron-coupled-proton buffer (ECPB), which enables spatiotemporally separated microbial oxidation and centralized H2 production through flexible solar energy utilization. During wastewater treatment, electrons and protons derived from microbial oxidation of organics are spontaneously captured and stored in the ECPB, operating day and night. This allows reduced ECPB to be rapidly oxidized for on-demand H2 production in a compact electrolyzer under sunlight. When treating real wastewater, the decoupled system achieved over 75% COD removal and an energy yield, defined as hydrogen energy output relative to the chemical energy of organics input, of 96.7%. By decoupling the slow microbial process from the rapid H2 evolution reaction, the system significantly outperformed a coupled MPEC. It exhibited a 4.8 times higher average H2 production rate, a 79% reduction in capital expenditure per unit of H2, 3 times the energy output, and superior H2 purity. These results demonstrate that the decoupled MPEC provides an effective strategy for flexible utilization of renewable energy, enabling both efficient wastewater treatment and sustainable green H2 generation.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1016/j.envres.2026.124891first seen 2026-06-10 05:30:43
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