Edson Baltazar Estrada-Arriaga, Raúl Montero-Farías, Cornelio Morales-Morales, Liliana García-Sánchez, Axel Falcón-Rojas, Marco A Garzón-Zúñiga, Tania Gutierrez-Macias
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The biofilm-based reactor was integrated by an anaerobic packed-bed biofilm reactor (APBBR) and an aerobic moving bed biofilm reactor (aeMBBR). The MEC/APBBR/aeMBBR was evaluated at different organic loading rates (OLRs) by applying voltage of 0.7 and 1.0 V. Result showed that the increase of OLRs from 0.2 to 0.44 kg COD/m<sup>3</sup> d did not affect organic matter removals. Nutrient and solids removal decreased with increasing OLR up to 0.44 kg COD/m<sup>3</sup> d. Global removal of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN), ammoniacal nitrogen (NH<sub>4</sub><sup>+</sup>), total phosphorus (TP) and total suspended solids (TSS) removal ranged from 81 to 84%, 84 to 85%, 53 to 68%, 88 to 98%, 11 to 30% and 76 to 88% respectively, was obtained in this study. The current density generated in the MEC from 0 to 0.41 A/m<sup>2</sup> contributed to an increase in hydrogen production and pollutants removal. The maximum volumetric hydrogen production rate obtained in the MEC was 0.007 L/L<sup>.</sup>d (0.072 L/d). 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引用次数: 0
摘要
化粪池是最常用的分散式污水处理系统，用于现场处理家庭污水。在不同的化粪池配置中，各种污染物的去除率较低。将微生物电解池（MEC）集成到化粪池或生物膜反应器中，可以成为一种绿色、可持续的家庭污水处理和能源生产技术。本研究将一个 50 升的化粪池改造成了一个 50 升的微生物电解池，并与生物膜反应器相结合，用于同时处理家庭废水和制氢。生物膜反应器由厌氧填料床生物膜反应器（APBBR）和好氧移动床生物膜反应器（aeMBBR）集成。通过施加 0.7 和 1.0 V 的电压，在不同的有机负荷率（OLR）下对 MEC/APBBR/aeMBBR 进行了评估。结果表明，有机负荷率从 0.2 kg COD/m3 d 增加到 0.44 kg COD/m3 d 并不影响有机物的去除。本研究获得的化学需氧量（COD）、生化需氧量（BOD）、总氮（TN）、氨氮（NH4+）、总磷（TP）和总悬浮固体（TSS）的总体去除率分别为 81%至 84%、84%至 85%、53%至 68%、88%至 98%、11%至 30%和 76%至 88%。MEC 中产生的电流密度从 0 到 0.41 A/m2 都有助于提高氢气产量和污染物去除率。在 MEC 中获得的最大体积产氢率为 0.007 L/L.d（0.072 L/d）。将 MEC 集成到基于生物膜的反应器中，施加 1.0 V 的电压，可在 MEC 中产生不同的生物电化学氮和磷转化，从而实现同时脱氮-硝化过程和除磷。
Performance of a pilot-scale microbial electrolysis cell coupled with biofilm-based reactor for household wastewater treatment: simultaneous pollutant removal and hydrogen production.
The septic tank is the most commonly used decentralized wastewater treatment systems for household wastewater treatment in on-site applications. The removal rate of various pollutants is lower in different septic tank configurations. The integration of a microbial electrolysis cells (MEC) into septic tank or biofilm-based reactors can be a green and sustainable technology for household wastewater treatment and energy production. In this study, a 50-L septic tank was converted into a 50-L MEC coupled with biofilm-based reactor for simultaneous household wastewater treatment and hydrogen production. The biofilm-based reactor was integrated by an anaerobic packed-bed biofilm reactor (APBBR) and an aerobic moving bed biofilm reactor (aeMBBR). The MEC/APBBR/aeMBBR was evaluated at different organic loading rates (OLRs) by applying voltage of 0.7 and 1.0 V. Result showed that the increase of OLRs from 0.2 to 0.44 kg COD/m3 d did not affect organic matter removals. Nutrient and solids removal decreased with increasing OLR up to 0.44 kg COD/m3 d. Global removal of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total nitrogen (TN), ammoniacal nitrogen (NH4+), total phosphorus (TP) and total suspended solids (TSS) removal ranged from 81 to 84%, 84 to 85%, 53 to 68%, 88 to 98%, 11 to 30% and 76 to 88% respectively, was obtained in this study. The current density generated in the MEC from 0 to 0.41 A/m2 contributed to an increase in hydrogen production and pollutants removal. The maximum volumetric hydrogen production rate obtained in the MEC was 0.007 L/L.d (0.072 L/d). The integration of the MEC into biofilm-based reactors applying a voltage of 1.0 V generated different bioelectrochemical nitrogen and phosphorus transformations within the MEC, allowing a simultaneous denitrification-nitrification process with phosphorus removal.
期刊介绍：
Bioprocess and Biosystems Engineering provides an international peer-reviewed forum to facilitate the discussion between engineering and biological science to find efficient solutions in the development and improvement of bioprocesses. The aim of the journal is to focus more attention on the multidisciplinary approaches for integrative bioprocess design. Of special interest are the rational manipulation of biosystems through metabolic engineering techniques to provide new biocatalysts as well as the model based design of bioprocesses (up-stream processing, bioreactor operation and downstream processing) that will lead to new and sustainable production processes.
Contributions are targeted at new approaches for rational and evolutive design of cellular systems by taking into account the environment and constraints of technical production processes, integration of recombinant technology and process design, as well as new hybrid intersections such as bioinformatics and process systems engineering. Manuscripts concerning the design, simulation, experimental validation, control, and economic as well as ecological evaluation of novel processes using biosystems or parts thereof (e.g., enzymes, microorganisms, mammalian cells, plant cells, or tissue), their related products, or technical devices are also encouraged.
The Editors will consider papers for publication based on novelty, their impact on biotechnological production and their contribution to the advancement of bioprocess and biosystems engineering science. Submission of papers dealing with routine aspects of bioprocess engineering (e.g., routine application of established methodologies, and description of established equipment) are discouraged.
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