School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
Energy and Environmental Engineering Division, National Institute of Agricultural Science, Rural Development Administration, Jeonju-si 54875, Republic of Korea.
Bioresour Technol. 2016 Sep;215:290-295. doi: 10.1016/j.biortech.2016.03.167. Epub 2016 Apr 4.
In this work, ammonia removal paths in microbial fuel cells (MFCs) under different initial pH conditions (pH 7.0, 8.0, and 8.6) were investigated. At a neutral pH condition (pH 7.0), MFC used an electrical energy of 27.4% and removed 23.3% of total ammonia by electrochemical pathway for 192h. At the identical pH condition, 36.1% of the total ammonia was also removed by the biological path suspected to be biological ammonia oxidation process (e.g., Anammox). With the initial pH increased, the electrochemical removal efficiency decreased to less than 5.0%, while the biological removal efficiency highly increased to 61.8%. In this study, a neutral pH should be maintained in the anode to utilize MFCs for ammonia recovery via electrochemical pathways from wastewater stream.
在这项工作中，研究了不同初始 pH 值条件（7.0、8.0 和 8.6）下微生物燃料电池（MFC）中的氨去除途径。在中性 pH 值条件（pH 7.0）下，MFC 利用 27.4%的电能，通过电化学途径在 192 小时内去除了 23.3%的总氨。在相同的 pH 值条件下，总氨的 36.1%也通过疑似生物氨氧化过程（例如 Anammox）的生物途径去除。随着初始 pH 值的升高，电化学去除效率降低至低于 5.0%，而生物去除效率则大幅升高至 61.8%。在本研究中，为了通过电化学途径从废水中回收氨，应在阳极保持中性 pH 值。
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