Magnetite enhances anaerobic digestion of high salinity organic wastewater

Environmental Research
Qian ChenDawn E Holmes

Abstract

Biological treatment of high salinity organic wastewater is a significant challenge because many microorganisms involved in the anaerobic digestion process cannot survive high osmotic pressures. In order to alleviate some of the stresses associated with the treatment of high salinity wastewater, two lab-scale up-flow anaerobic sludge bed reactors with or without magnetite (100 g/L) were used to treat high salinity organic wastewater. This study showed that the bioreactor amended with magnetite had higher chemical oxygen demand removal efficiencies (90.2% ± 0.54% vs 73.1% ± 1.9%) and methane production rates (4082 ± 334 ml (standard temperature and atmospheric pressure, STP)/d vs 2640 ± 120 ml (STP)/d) than the non-amended control reactor. In addition, the consumption of volatile fatty acids (20.9 ± 3.4 mM vs 61.7 ± 2.0 mM) was accelerated. Microbial community analysis revealed that the addition of magnetite caused the enrichment of many bacterial genera known to form robust biofilms (i.e. Pseudomonas) that are also capable of extracellular electron transfer and methanogens from the genus Methanosarcina which have been shown to participate in direct interspecies electron transfer. These results show that magnetite addition could...Continue Reading

References

Apr 5, 2003·Applied and Environmental Microbiology·Gail M Teitzel, Matthew R Parsek
Feb 27, 2004·Nature·Hang T DinhFriedrich Widdel
Oct 31, 2006·Water Research·Olivier Lefebvre, René Moletta
Jun 24, 2009·Environmental Science & Technology·Shaoan ChengBruce E Logan
Sep 25, 2012·Applied and Environmental Microbiology·Christopher W MarshallHarold D May
Mar 14, 2013·FEMS Microbiology Reviews·Brandon E L MorrisChristine Moissl-Eichinger
Nov 6, 2014·Extremophiles : Life Under Extreme Conditions·Irene Sánchez-AndreaD Barrie Johnson
Dec 8, 2016·Advances in Applied Microbiology·D E Holmes, J A Smith
May 17, 2017·Water Research·M C GaglianoJ B Van Lier
Jan 15, 2019·Bioresource Technology·Piotr ŚwiątczakMagdalena Zielińska
Jul 25, 2019·International Journal of Molecular Sciences·Wen YinJin He
Aug 29, 2019·Science Advances·Divya PrakashJames G Ferry

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofilm & Infectious Disease

Biofilm formation is a key virulence factor for a wide range of microorganisms that cause chronic infections.Here is the latest research on biofilm and infectious diseases.