Impacts of sulfur source and temperature on sulfur-driven denitrification by pure and mixed cultures of Thiobacillus

Bacterial community and nitrate removal by simultaneous heterotrophic and autotrophic denitrification in a bioelectrochemically-assisted constructed wetland

“…Contrary to sample GACc, Thiobacillus (43.94%) and Gallionella (8.59%) were the two most dominant genera in sample GFc, whereas their abundances in sample GACc were only 5.24% and 0.1%, respectively. Thiobacillus has been considered a typical autotrophic bacterium over the last decades, which is closely related to oxidizing the reducing inorganic sulfur (Capua et al, 2016;Liu et al, 2015). In recent years, it has been suggested that some species belonging to the genus Thiobacillus play a key role in the cathode-driven bioelectrochemical reduction of nitrate Nguyen et al, 2016).…”

Power recovery coupled with sulfide and nitrate removal in separate chambers using a microbial fuel cell

“…However, the power generation would be suppressed when the temperature was increased beyond the suitable range for microorganisms. The optimal temperature ranges 30-35 • C for chemolithotrophic denitrifying bacteria and 28-35 • C for chemolithotrophic sulfur-oxidizing bacteria [23,24]. In this study, the optimal power density of 2.80 ± 0.05 W/m 3 NC was obtained at a temperature of 30 • C and an external resistance of 422 (Table 3).…”

Long-term performance evaluation of an anoxic sulfur oxidizing moving bed biofilm reactor under nitrate limited conditions

“…) as the electron acceptor has gained increasing interest since reduced sulfur compounds and NO 3 − can be simultaneously removed from waste streams by a single anaerobic process. [3][4][5][6][7] The operation of anoxic sulfur-oxidizing bioreactors entails the use of a highly soluble electron acceptor (i.e. NO 3…”

“…[12][13][14] However, few studies focused on the operation of anoxic MBBRs for treating sulfur contaminated wastewaters. Full-scale sulfuroxidizing bioreactors may experience fluctuations in the influent NO 3 − concentration as well as an unexpected increase or decrease of sulfur loading, which can lead to severe NO 3 − limitation in the system. Furthermore, when the NO 3 − and nitrite (NO 2…”

“…) concentrations in the influent wastewater are insufficient to sustain the process, a NO 3 − source (e.g., NaNO 3 , KNO 3 , CaIJNO 3 ) 2 ) can be supplied externally to maintain the process efficiency. 15 Dosing must be strictly controlled to minimize the addition of chemicals and the operational costs.…”