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<p>This study deals with the feasibility of Cheese Whey (CW) treatment using a Microbial Electrolysis Cell-Anaerobic Digestion (MEC-AD) system. For this purpose, two identical reactors were constructed, a control (AD) and a MEC-AD reactor. The MEC-AD operated for 310 d and the effects of (a) CW pretreatment, (b) Organic Loading Rate (from 1.4 to 3.3&#xa0;g<sub>COD</sub>/(L d)) and (c) applied potential (1 and 2&#xa0;V) were examined on the MEC-AD performance. The results showed that the AD reactor failed to treat CW in every case examined, whereas the MEC-AD successfully treated the CW. In particular, the optimal CW treatment was obtained with the pretreated CW, at the OLR of 2.1&#xa0;g<sub>COD</sub>/(L d) and at the applied potential of 1&#xa0;V and achieved a COD removal of 98% and a residual COD concentration of 1.2&#xa0;g<sub>COD</sub>/L. The optimal CH<sub>4</sub> yield was obtained with the pretreated CW, at the OLR of 3.3 g<sub>COD</sub>/(L d) and at the applied potential of 1&#xa0;V and was 0.75&#xa0;L<sub>CH4</sub>/g<sub>sCODconsumed</sub>, higher than any yield obtained utilizing AD systems. Overall, the results showed that the MEC-AD system is a very promising technology for treating CW with simultaneous CH<sub>4</sub> production, whereas the AD process fails.</p> Graphical Abstract <p></p>

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Cheese Whey Treatment Using a Microbial Electrolysis Cell-Assisted Anaerobic Digestion System: The Effects of Pretreatment, Organic Loading and Applied Potential

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月2日

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  • Gerasimos Kanellos,
  • Michail Antarachas,
  • Gerasimos Lyberatos,
  • Asimina Tremouli

摘要

This study deals with the feasibility of Cheese Whey (CW) treatment using a Microbial Electrolysis Cell-Anaerobic Digestion (MEC-AD) system. For this purpose, two identical reactors were constructed, a control (AD) and a MEC-AD reactor. The MEC-AD operated for 310 d and the effects of (a) CW pretreatment, (b) Organic Loading Rate (from 1.4 to 3.3 gCOD/(L d)) and (c) applied potential (1 and 2 V) were examined on the MEC-AD performance. The results showed that the AD reactor failed to treat CW in every case examined, whereas the MEC-AD successfully treated the CW. In particular, the optimal CW treatment was obtained with the pretreated CW, at the OLR of 2.1 gCOD/(L d) and at the applied potential of 1 V and achieved a COD removal of 98% and a residual COD concentration of 1.2 gCOD/L. The optimal CH4 yield was obtained with the pretreated CW, at the OLR of 3.3 gCOD/(L d) and at the applied potential of 1 V and was 0.75 LCH4/gsCODconsumed, higher than any yield obtained utilizing AD systems. Overall, the results showed that the MEC-AD system is a very promising technology for treating CW with simultaneous CH4 production, whereas the AD process fails.

Graphical Abstract