Simultaneous selenate reduction and denitrification by a consortium of enriched mine site bacteria

Diversifying Anaerobic Respiration Strategies to Compete in the Rhizosphere

“…For certain bacteria, anaerobic reduction of toxic compounds does not always support growth in anaerobic conditions. In this case, anaerobic reduction of toxic oxyanions is coupled with another anaerobic respiration, such as Fe(III) and denitrification (Hunter and Kuykendall, 2007;Lee et al, 2012;Subedi et al, 2017).…”

Novel bioremediation processes for treatment of seleniferous soils and sediment

“…Slower growth rate and doubling time of the biomass from Lake Grevelingen lead to long term operation of the batches irrespective of the electron donor provided. Other studies Jain et al, 2016Liang et al, 2015;Subedi et al, 2017;Tang et al, 2014) show removal of similar concentrations of selenium oxyanions within the period of 1-2 weeks using anaerobic granular sludge. However, the advantage of using MLG sediment is that the biomass is capable of utilizing inexpensive and readily available methane as electron donor.…”

“…During the entire 348 days, no operational problems such as biomass over growth, filter clogging was encountered. Selenium oxyanion reduction by chemical and biological processes have been well documented in various studies (Howarth et al, 2015;Yarlagadda V Nancharaiah and Lens, 2015;Subedi et al, 2017;Tang et al, 2014) that include selenate coreduction with other electron acceptors like sulfate and ammonia (Mal et al, 2017) using different electron donors Viamajala et al, 2006).…”

N-P Fertilization Stimulates Anaerobic Selenium Reduction in an End-Pit Lake

“…No long term data was available prior to fertilization. As a highly oligotrophic headwater pit-lake, we assumed phosphorus to be limiting with negligible concentrations and nitrogen to be potentially higher due to input from blasting operations during mining 43 , 44 . We estimated the volume of the lake from its surface area and depth and chose a target concentration for total P as roughly 0.5 mg/l.…”