Hydrogen evolution in microbial electrolysis cells treating landfill leachate: Dynamics of anodic biofilm

被引：41
作者：
Hassan, Muhammad [1 ,2 ]
Sotres Fernandez, Ana [1 ]
San Martin, Isabel [1 ]
Xie, Bing [2 ]
Moran, Antonio [1 ]
机构：
[1] Univ Leon, Nat Resources Inst IRENA, Chem & Environm Bioproc Engn Grp, Avda Portugal 41, Leon 24009, Spain
[2] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 29期
基金：
美国国家科学基金会;
关键词：
Microbial electrolysis cells (MECs); Energy efficiency; Landfill leachate; Pyrosequencing; Hydrogen; WASTE-WATER TREATMENT; NITROGEN REMOVAL; FUEL-CELLS; METHANE PRODUCTION; APPLIED VOLTAGE; ORGANIC-MATTER; GAS-PRODUCTION; RECOVERY; PERFORMANCE; ACETATE;
D O I：
10.1016/j.ijhydene.2018.05.055
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study investigates the potential opportunities of hydrogen evolution treating landfill leachate in a set of two microbial electrolysis cells (MEC-1 and 2) under 30 degrees C and 17 +/- 3 degrees C temperatures, respectively. The system achieved a projected current density of 1000-1200 mA m(-2) (MEC-1) and 530-755 mA M-2 (MEC-2) coupled with low cost hydrogen production rate of 0.148 L La-1 d(-1) (MEC-1) and 0.04 L La-1 d(-1) (MEC-2) at an applied voltage of 1.0 V. Current generation led to a maximum COD oxidation of 73 +/- 8% (MEC-1) and 65 +/- 7% (MEC-2) with >= 100% energy recovery. The system also exhibited a high hydrogen recovery (66-95%), pure hydrogen yield (98%) and tremendous working stability during two months of operation. Electroactive microbes such as Pseudomonadaceae, Geobacteraceae and Comamonadaceae were found in anodophilic biofim, along with Rhodospirillaceae and Rhodocyclaceae, which could be involved in hydrogen production. These results demonstrated an energy-efficient approach for hydrogen production coupled with pollutants removal. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：13051 / 13063
页数：13
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