Hydrogen production from continuous flow, microbial reverse-electrodialysis electrolysis cells treating fermentation wastewater

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

“…RED systems integrated with other technologies are emerging as an attractive option in the production of key resources like water and hydrogen, in addition to electrical energy generation. RED technology can be integrated with different technologies in desalination [35,38,47,99,100,107,[318][319][320][321][322], bio-electrochemical systems [51,53,107,278,323,324] and water electrolysis [23,106,278] (Table 7).…”

“…One of the limitations of MFCs is that they cannot be simply linked in series to boost the overall potential since cells in a stacked MFC undergo voltage reversal leading to an OCV equal to (or less than) that of a single cell [357]. One means to overcome this limitation is the use of an integrated approach combining MFC and RED, creating a new system termed as 'Microbial RED Cell (MRC)' [50,51,53,101,323,324]. Figure 31B…”

“…With the aim to optimize the MRC, Kim and Logan [51] [324] produced H2 from fermentation wastewater, recording a hydrogen production rate of 0.9 ± 0.1 m 3 H2/m 3 /d. Recently, the use of substrate without buffer solution in a MREC has been demonstrated Song et al [363].…”

Salinity-gradient energy driven microbial electrosynthesis of hydrogen peroxide

“…Recently, a novel type of microbial electrochemical technologies called microbial reverseelectrodialysis cell (MRC) or microbial reverse-electrodialysis electrolysis cell (MREC), which combines a reverse electrodialysis cell (RED) with MFC or MEC have been developed to enhance electricity production and wastewater treatment or to drive H 2 or CH 4 generation [10][11][12][13][14][15]. MRC and MREC are more effective than traditional MFC and MEC on energy capture [10,12,16,17].…”

A comparison of mono- and multi-valent ions as stack feed solutions in microbial reverse-electrodialysis electrolysis cells and their effects on hydrogen generation

“…In recent years, the combined technology between microbial electrolysis cells (MEC) and reverse electrodialysis (RED), commonly referred to as microbial reverse-electrodialysis electrolysis cells (MREC), has been proposed as a new hydrogen gas production method (Kim and Logan, 2011;Nam et al, 2012;Luo et al, 2013;Watson et al, 2015). The major advantages of the MREC system compared to conventional technologies are that the MREC system can eliminate the required external energy for hydrogen generation and can also achieve relatively high hydrogen yield in addition to the efficient removal of organics.…”