日本地球惑星科学連合2023年大会

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[E] オンラインポスター発表

セッション記号 A (大気水圏科学) » A-GE 地質環境・土壌環境

[A-GE28] Energy-Environment-Water Nexus and Sustainable Development

2023年5月26日(金) 10:45 〜 12:15 オンラインポスターZoom会場 (6) (オンラインポスター)

コンビーナ:川本 健(埼玉大学大学院理工学研究科)、Yonghong Hao Hao(Tianjin Normal University)、Jet-Chau Wen(National Yunlin University of Science and Technology)、Wenke Wang(Changan University)

現地ポスター発表開催日時 (2023/5/25 17:15-18:45)

10:45 〜 12:15

[AGE28-P12] Biofiltration System Using Granulated Autoclaved Aerated Concrete (AAC) for Phosphorus Recovery from Municipal Wastewater in Vietnam

*Son Hoai Tran1、Viet Nga Thi Tran1Kawamoto Ken2 (1.Hanoi University of Civil Engineering, Viet Nam、2.Graduate School of Science and Engineering, Saitama University)

キーワード:Municipal wastewater, wastewater treatment, Autoclaved Aerated Concrete (AAC), phosphorus recovery


Municipal wastewater (MWW) is the main wastewater source that causes serious surface water pollution in Vietnam and approximately 80% of MWW discharges directly to the canals or inner rivers. MWW is characterized by high dissolved organic matter, ammonium, and phosphorus content. In the wastewater treatment plant, the organic matter is easily removed by biological treatment processes, but a high amount of chemicals are used for the removal of phosphorus (P), resulting in an increase in the operation cost for MWW treatment. Autoclaved Aerated Concrete (AAC) is one of the popular construction materials, it has a high porosity and large surface area, which can be expected as a low-cost suitable adsorbent from the viewpoints of microorganism inhabitants in the biofiltration system. Besides, AAC is rich in metal oxides/hydroxides that have a high affinity with phosphate (PO43-) in MWW. This study, therefore, investigated the P recovery (as well as the treatment of other organic pollutants) from MWW using a newly developed biofiltration system assembled with multiple bioreactors packed with granulated AAC. The results showed that the newly developed system well treated the organic pollutants in MWW and the treatment efficiencies became > 90% for COD, > 70% for total nitrogen, and > 90% for total P (meaning the high P recovery) and that the effluent after the treatment met well the national technical regulation on domestic wastewater discharge in Vietnam. The recovered P in the system (i.e., P-sorbed granulated AAC) would be expected to use as a recycled soil conditioner especially for improving agricultural soil health.