Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, India.
Water Environ Res. 2024 Sep;96(9):e11119. doi: 10.1002/wer.11119.
Microbial electrolysis cell (MEC) is gaining importance not only for effectively treating wastewater but also for producing hydrogen. The up-flow microbial electrolysis cell (UPMEC) is an innovative approach to enhance the efficiency, and substrate degradation. In this study, a baffled UPMEC with an anode divided into three regions by inserting the baffle (sieve) plates at varying distances from the cathode was designed. The effect of process parameters, such as flow rate (10, 15, and 20 mL/min), electrode area (50, 100, and 150 cm), and catholyte buffer concentration (50, 100, and 150 mM) were investigated using distillery wastewater as substrate. The experimental results showed a maximum of 0.6837 ± 0.02 mmol/L biohydrogen at 150 mM buffer, with 49 ± 1.0% COD reduction using an electrode of area 150 cm. The maximum current density was 1335.94 mA/m for the flow rate of 15 mL/min and surface area of 150 cm. The results showed that at optimized flow rate and buffer concentration, maximum hydrogen production and effective treatment of wastewater were achieved in the baffled UPMEC. PRACTITIONER POINTS: Biohydrogen production from distillery wastewater was investigated in a baffled UPMEC. Flowrate, concentration and electrode areas significantly influenced the hydrogen production. Maximum hydrogen (0.6837±0.02mmol/L.day) production and COD reduction (49±1.0%) was achieved at 15 mL/min. Highest CHR of 95.37±1.9 % and OHR of 4.6±0.09 % was observed at 150 mM buffer concentration.
微生物电解池（MEC）不仅在有效处理废水方面越来越重要，而且在生产氢气方面也越来越重要。上流式微生物电解池（UPMEC）是一种提高效率和底物降解的创新方法。本研究设计了一种带有挡板（筛板）的挡板式 UPMEC，该挡板将阳极分为三个区域，其与阴极的距离不同。研究了工艺参数（流量为 10、15 和 20ml/min、电极面积为 50、100 和 150cm、阴极缓冲液浓度为 50、100 和 150mM）对以酿酒废水为基质的生物氢气产生的影响。实验结果表明，在 150mM 缓冲液下，最大生物氢气产量为 0.6837±0.02mmol/L，采用 150cm2 电极面积时 COD 去除率为 49±1.0%。在 15ml/min 的流速和 150cm2 的表面积下，最大电流密度为 1335.94mA/m。结果表明，在优化的流速和缓冲液浓度下，挡板式 UPMEC 可实现最大的氢气产量和废水的有效处理。
在挡板式 UPMEC 中研究了从酿酒废水中生产生物氢气。流速、浓度和电极面积对氢气的产生有显著影响。在 15ml/min 时，最大产氢量（0.6837±0.02mmol/L.day）和 COD 去除率（49±1.0%）达到最高。在 150mM 缓冲液浓度下，CHR 最高（95.37±1.9%），OHR 最高（4.6±0.09%）。
