Granular sludge formation and characterization in a chain elongation process

Roghair, Mark; Strik, D.P.B.T.B.; Steinbusch, K.J.J.; Weusthuis, Ruud A.; Bruins, Marieke E.; Buisman, C.J.N.

doi:10.1016/j.procbio.2016.06.012

Cited by 47 publications

(82 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For inoculation of the MES cells, several sources were mixed: 1) effluent from two different running chain elongation reactors, 2) effluent from two running CO 2 reducing biocathodes, 3) primary sludge (WWTP Bennekom, the Netherlands), and 4) VFA producing granular sludge (provided by Paques BV, the Netherlands). The mixture was washed 3 times by centrifugation for 10 min at 10000 rpm followed by resuspension of the pellet in fresh buffer solution, and was used as inoculum for the four MESs.…”

Section: Methodsmentioning

confidence: 99%

Continuous Long‐Term Bioelectrochemical Chain Elongation to Butyrate

et al. 2016

View full text Add to dashboard Cite

We demonstrate here the long‐term continuous bioelectrochemical chain elongation from CO2 and acetate by using a mixed microbial culture. The role of applied current (3.1 vs. 9.3 A m−2) on the performance was investigated. The main product was n‐butyrate which was continuously produced over time. Trace amounts of propionate and n‐caproate were also produced, but no alcohols were detected during the whole course of the experiment (163 days). Microbial electrosynthesis (MES) systems controlled with more current (9.3 Am−2) showed a butyrate concentration that was 4.5 times higher (maximum 0.59 g L−1) and increased volumetric production rates (0.54 g L−1 day−1) compared to the low‐current reactors (0.12 g L−1 day−1), at 58.9 and 71.6 % electron recovery, respectively. Biocatalytic activity of the microbial consortia was demonstrated. This study revealed that the solid‐state electrode does control the chain elongation reaction as an essential electron donor and determines the performance of MES systems. This study highlights MES as a promising alternative for acetate upgrading.

show abstract

Section: Methodsmentioning

confidence: 99%

Continuous Long‐Term Bioelectrochemical Chain Elongation to Butyrate

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The continuous production of caproate through the chain elongation process was initially demonstrated in 2010, and the development of caproate production from cheap waste continued. Most of these studies investigated different types of substrates, bioprocessing conditions . various microbial species .…”

Section: Bess Versus Anaerobic Digestion Bioreactorsmentioning

confidence: 99%

Bioelectrochemical synthesis of caproate through chain elongation as a complementary technology to anaerobic digestion

Reddy

ElMekawy

Pant

2018

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

Chain elongation is one of the common anaerobic fermentation processes in which bacteria convert ethanol and short chain fatty acids (SCFA) into medium chain fatty acids (MCFA). These are single carboxylic acids having six to twelve carbon atoms, with several applications, such as biofuels. Caproate is a promising MCFA, and several technologies were proposed for the valorization of waste to obtain it. Bioelectrochemical systems (BESs) are technologies that are capable of converting the chemical energy of organic/inorganic wastes into value‐added products, using in situ generated H2 or electricity as energy sources. To convert waste biomass into caproate, an electron donor in the form of hydrogen or ethanol should be supplemented within the anaerobic fermentation, which can be used as the electron donor in the cathodic compartment for the conversion of acetate into caproate. This review highlights recent anaerobic and bioelectrochemical processes for the production of caproate. The discussion will also cover the potential applications of this technology, together with obstacles to its use, compared with the conventional anaerobic digestion (AD) process, and considers whether it could be a standalone technology or a complementary one for AD. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

show abstract

“…MCFAs can be produced from acidified organic waste, by a process called chain elongation 24,26,27,130 . This process is being commercialized by ChainCraft and Earth Energy Renewables.…”

Section: Possible Feedstocksmentioning

confidence: 99%

Production of medium-chain, a, omega-bifunctional monomers from fatty acids and n-alkanes

Nuland¹

View full text Add to dashboard Cite

show abstract

Granular sludge formation and characterization in a chain elongation process

Cited by 47 publications

References 20 publications

Continuous Long‐Term Bioelectrochemical Chain Elongation to Butyrate

Continuous Long‐Term Bioelectrochemical Chain Elongation to Butyrate

Bioelectrochemical synthesis of caproate through chain elongation as a complementary technology to anaerobic digestion

Production of medium-chain, a, omega-bifunctional monomers from fatty acids and n-alkanes

Contact Info

Product

Resources

About