Abstract
Bio-electrochemical anaerobic digestion (AD) is one of the most recent advancement in anaerobic treatment processes. Microbial electrolysis cells (MECs) are used for bio-electrochemical treatment, where the supplied external power is used to enhance the performance of AD. Multiple studies have investigated the viability of MECs under various operating parameters and for different organic wastes. The present paper aims at reviewing the latest literature regarding bio-electrochemical enhanced AD through MECs. It was concluded that MEC reactors significantly enhance AD performance under different supplied voltages, temperatures, electrodes configuration, as well as other operating parameters. Based on the compiled literature, further comprehensive life cycle assessment of MECs is recommended prior to any full-scale implementation.
Highlights
The world population reached around 7.5 billion in 2017, and is projected to increase by another one billion before 2030 [1]
The present paper aims at reviewing the latest literature regarding bio-electrochemical enhanced anaerobic digestion (AD) through Microbial electrolysis cells (MECs)
This study aimed at reviewing the literature related to the utilization of MEC reactors for bio-electrochemically enhancing the performance of conventional AD
Summary
The world population reached around 7.5 billion in 2017, and is projected to increase by another one billion before 2030 [1]. This population growth, associated with an increase in living standards and urbanization levels, comes with increasing hazards to the environment. Wastewater generation has significantly increased due to the increasing water demand, as well as the escalating municipal solid waste (MSW) production. Only 70, 38, and 28% of generated wastewater is treated in high, middle, and low-income countries, respectively [2]. Numerous technologies have been established to treat those types of wastes
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