Removal and Recovery of Ammonium Nitrogen from Dairy Processing Wastewater Using Air Stripping Technology: A Pilot-Scale Study
乳製品加工廃水からの空気ストリッピング技術によるアンモニウム窒素の除去と回収：パイロットスケール研究 (AI 翻訳)
Md Sydur Rahman, Toby Shapiro Ellis, Isaiah J. R. Freeburn, Andrew Rose, A. W. Thornton, Dirk Erler
🤖 gxceed AI 要約
日本語
この研究では、乳製品加工廃水からアンモニウム窒素を除去・回収するためのパイロットスケールの空気ストリッピングシステムを設計・評価しました。pH、温度、空気流量の最適条件（pH11、32℃、300L/min）で、合成廃水では約40%、実廃水では約34%の除去率を達成。さらに、化学沈殿前処理とストリッピング時間の延長により除去率が約70%に向上し、下流の酸浴と活性炭による回収システムで70-95%のアンモニアを回収しました。これは循環経済に貢献します。
English
This pilot-scale study designed an air stripping system for ammonium nitrogen removal and recovery from dairy processing wastewater. Optimal conditions (pH 11, 32°C, 300 L/min) achieved ~40% removal for synthetic and ~34% for real wastewater. Incorporating chemical precipitation and extending stripping time improved removal to ~70%. The downstream capture system recovered 70-95% of ammonia. This integrated system supports circular economy and sustainable nitrogen cycle.
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
本論文は、廃水からの窒素除去・回収技術を提示し、日本の循環経済政策や窒素排出規制に貢献する。特に、乳製品産業での適用が期待される。
In the global GX context
Globally, this study contributes to the circular economy and sustainable nitrogen management, key aspects of green transformation. It demonstrates a practical technology for nutrient recovery from industrial wastewater, supporting initiatives like the EU's Circular Economy Action Plan.
👥 読者別の含意
🔬研究者:This study provides a pilot-scale demonstration of air stripping for ammonium recovery, offering insights into process optimization and real wastewater challenges.
🏢実務担当者:Dairy processing facilities can use this integrated system to meet discharge limits and recover ammonia for fertilizer or other uses.
🏛政策担当者:This research supports policies promoting resource recovery from wastewater and circular economy, informing regulations on nitrogen discharge and nutrient recycling.
📄 Abstract（原文）
Ammonium nitrogen (NH4+-N) removal and recovery from wastewater have been critical issues worldwide and key to achieving a sustainable nitrogen cycle and circular economy. In this study, we designed and constructed a pilot-scale air stripping system integrated with a nutrient-capture unit and evaluated the effective pH, temperature, and airflow conditions for maximising NH4+-N removal and recovery from dairy processing wastewater (DPW). Our results demonstrated that increasing pH and temperature substantially enhances NH4+-N removal via air stripping, with higher airflow rates further improving performance. Under these conditions (pH 11, 32 °C, and 300 L min−1), NH4+-N removal from synthetic wastewater reached ≈40% after 6 h air stripping. In comparison, real DPW exhibited slightly lower removal efficiency under the same conditions, achieving ≈34%, likely due to its more complex matrix. Additionally, incorporating a chemical precipitation step followed by filtration prior to air stripping removed NH4+-N from DPW, achieving ≈43%. However, extending the stripping duration under identical conditions significantly improved removal performance, increasing NH4+-N removal in DPW to ≈70%. The downstream capturing system, consisting of acid bath and granulated activated carbon (GAC), consistently recovered 70–95% of the released ammonia (NH3) when even upstream NH4+-N removal via air stripping was moderate. The GAC effectively adsorbed the volatilised NH3, achieving adsorption capacities of up to ≈18 mg/kg. Overall, this integrated system demonstrates strong potential for simultaneous NH4+-N removal and recovery from industrial wastewater streams, offering notable environmental benefits.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/w18020196first seen 2026-05-06 00:14:40
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