Tetracycline removal-methanogenesis trade-off in anaerobic digestion: Divergent roles of granular activated carbon and electrical stimulation
嫌気性消化におけるテトラサイクリン除去とメタン生成のトレードオフ：粒状活性炭と電気刺激の相反する役割 (AI 翻訳)
Tingxia Liu, Qidong Yin, Qianqian Zhang, Guangxue Wu
🤖 gxceed AI 要約
日本語
嫌気性消化におけるテトラサイクリン(TC)阻害下で、粒状活性炭(GAC)と電気刺激の併用効果をUASBリアクターで検証。GAC単独ではメタン生成を24.8%向上させTC除去も64%と高いが、電気刺激との併用ではメタン生成が71%抑制され、両者は拮抗的に作用。ハイブリッド設計には機構的適合性が重要と示唆。
English
This study examines the combined effects of granular activated carbon (GAC) and electrical stimulation on anaerobic digestion under tetracycline (TC) stress using UASB reactors. GAC alone enhanced methane production by 24.8% and achieved 64% TC removal, but combining GAC with electrical stimulation suppressed methane by 71%, revealing antagonistic interactions. The findings highlight the need for mechanistic compatibility in hybrid amendment design for antibiotic-laden wastewater treatment.
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
日本の排水処理分野では、抗生物質を含む廃水の処理は畜産や製薬産業で課題。本研究成果は、GACと電気刺激の併用が逆効果となる可能性を示し、省エネ型排水処理技術の設計に示唆を与える。ただし、GX政策との直接的な関連は薄い。
In the global GX context
Globally, antibiotic resistance is a growing concern, and wastewater treatment plays a role in mitigating environmental release. This study provides insights into optimizing anaerobic digestion for antibiotic-laden wastewater, which is relevant for sustainable waste management and renewable energy production (biogas). However, the direct link to climate disclosure or transition finance is limited.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into the antagonistic effects of GAC and electrical stimulation in anaerobic digestion, informing future hybrid system designs.
🏢実務担当者:Offers practical guidance for wastewater treatment plant operators considering GAC or electrical stimulation to avoid unintended methane suppression.
📄 Abstract（原文）
Tetracycline (TC) in wastewater impairs methanogenesis during anaerobic digestion. Although granular activated carbon (GAC) and electrical stimulation alone have been shown to mitigate TC inhibition, their combined effects remain unclear. Four up-flow anaerobic sludge blanket (UASB) reactors were operated at 5 mg/L TC, designated UASB CON (control), UASB GAC (5 g/L GAC dosed), UASB ELE (0.6 V voltage applied), and UASB GAC/ELE (5 g/L GAC dosed and 0.6 V applied). Voltage was applied (Stage Ⅰ), terminated (Stage Ⅱ), and resumed (Stage Ⅲ) in UASB ELE and UASB GAC/ELE . During the stable period of Stage I, UASB GAC enhanced methane production by 24.8% relative to UASB CON ( p < 0.001), while UASB ELE remained comparable to UASB CON . TC removal efficiency during Stage I followed the order UASB GAC (64.0%) > UASB GAC/ELE (57.5%) > UASB CON (34.5%) > UASB ELE (30.1%). Neither single-amendment reactor showed a TC removal–methanogenesis trade-off. In contrast, UASB GAC/ELE suppressed methane production by 71.0% relative to UASB CON ( p < 0.001), with a persistent trade-off (R 2 = 0.492, p < 0.001). In UASB GAC , GAC adsorption initially reduced bioavailable TC and sustained methane production. Meanwhile, UASB ELE exhibited a zone-dependent community structure: TC-degrading genera were enriched at the electrode-proximal zone (cathode and anode biomass combined; 3.4 times that of bulk sludge), while methanogens predominantly resided in the bulk sludge. However, this zone-dependent pattern was attenuated in UASB GAC/ELE , where the electrode-to-bulk ratio of TC degraders declined to 2.2. GAC and electrical stimulation thus acted antagonistically rather than synergistically under TC stress. Mechanistic compatibility should guide hybrid amendment design in anaerobic systems treating antibiotic-containing wastewater.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.jhazmat.2026.143153first seen 2026-08-05 04:51:40
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