The role of sulfate in aerobic granular sludge process for emerging sulfate-laden wastewater treatment

Sludge volume index and suspended solids estimation of mature aerobic granular sludge by quantitative image analysis and chemometric tools

“…The aerobic granular sludge (AGS) systems are a promising technology to replace AS systems due to the smaller footprint and the possibility to remove organic matter and nutrients (N and P) simultaneously in the same reactor [4,5]. In this sense, AGS systems have already been used to treat different troublesome wastewaters including from the pulp and paper industry, petrochemical, hypersaline, oily and sulfur-laden effluents, and applied in heavy metals removal, among others [6][7][8][9][10]. However, the performance and stability of the biomass aggregates is related to their structure and settling ability [11,12], and it is known that changes in the granules size can occur due to unstable process conditions [13].…”

Mechanism and regulation of filamentous algal‐bacterial symbiosis based on microbiological quorum sensing

“…The above results indicate that exogenous AHLs have a significant effect on the EPS components of the algal‐bacterial symbiotic system, primarily by adjusting the LB‐EPS and TB‐EPS content. Additionally, the total polysaccharide content of the system changed (LB‐ and TB‐polysaccharide), indicating that the results of static experiments were a result of the quorum sensing regulatory mechanism (Hao et al, 2016; Xue et al, 2017). The initial response and positive induction were due to the extracellular polysaccharide secretion function.…”

Integrated Modeling and Lab-Scale Investigations Demonstrate the Impact of Sulfide on a Membrane Aerated Biofilm Reactor

“…Several published studies have focused on one-stage nitrogen removal using either methane or sulfide as electron donors, 13,16−18 but to our knowledge, no studies have evaluated the application of both methane and sulfide for nitrogen removal in single-stage nitrogen removal reactors that support oxic and anoxic environments. 13,16,17 Using sulfide as a potential electron donor for denitrification is challenging because sulfide can inhibit several N-removal processes, including conventional denitrification and anammox, 19,20 thus favoring the retention of bioavailable N. However, sulfide-oxidizing denitrifiers often inhabit gradient systems/biofilms where oxidation rates can be high despite low local concentrations of sulfide. 21 Inhibition constants for anammox, an additional N removal process, can be as low as 0.32 mg S/L.…”

“…Sulfide- and methane-rich wastewater would also result from anaerobic treatment processes because sulfate reducing bacteria convert the sulfate to sulfide, and there is residual dissolved methane in anaerobic effluents. − For these reasons, there is ongoing research on harnessing sulfide or methane as an electron donor for denitrification (e.g., − ). Several published studies have focused on one-stage nitrogen removal using either methane or sulfide as electron donors, ,− but to our knowledge, no studies have evaluated the application of both methane and sulfide for nitrogen removal in single-stage nitrogen removal reactors that support oxic and anoxic environments. ,, …”