Treatment of a submerged anaerobic membrane bioreactor (SAnMBR) effluent by an activated sludge system: The role of sulphide and thiosulphate in the process

Prospects for Biological Nitrogen Removal from Anaerobic Effluents during Mainstream Wastewater Treatment

“…Sulfate concentrations in domestic wastewater vary considerably, depending upon factors such as industrial wastewater discharges, the coagulant used for drinking water treatment, and drinking water sources. During anaerobic treatment, sulfate is reduced by sulfate-reducing microorganisms to sulfide and hydrogen sulfide gas, undesirable products that are corrosive, malodorous with an odor threshold of 0.04 ppmv, dangerous to human health at concentrations above 100 ppmv, and inhibitory to nitrification and methanogenesis. , Anaerobic treatment converts the organic carbon in domestic wastewater to gaseous products (carbon dioxide and methane) and dissolved products (organic acids , and methane , ). The concentration of dissolved methane in anaerobic effluents varies seasonally and increases when the temperature decreases.…”

“…This review synthesizes past studies of biological nitrogen removal from anaerobic effluents − and rapidly developing energy efficient approaches for nitrogen removal that have not been included in previous reviews. , We review microbial metabolic processes that are likely to be active in nitrogen removal treatment systems receiving anaerobic effluents and emphasize the fact that computational process modeling can help us understand how these complex metabolisms are likely to behave under various treatment approaches. We consider trade-offs that exist among energy demand, greenhouse gas emissions, space requirements, and effluent nitrogen concentration, all of which are strongly influenced by reactor configuration and operational control strategy.…”

Impact of reactor configurations on the performance of a granular anaerobic membrane bioreactor for municipal wastewater treatment

“…Galib et al (2016) revealed that methane loss in the aqueous phase was significant and could be up to 58% of the total methane produced from AnMBRs. While Sanchez-Ramirez et al (2015) also suggested a significant dissolved methane concentration, accounting for 20 -40% of methane in the produced biogas, could be lost in the AnMBR effluent. Furthermore, when using AnMBR for the treatment of municipal wastewater under low temperatures (i.e.…”

Impact of dissolved sulfide on a hybrid membrane bioreactor treating the effluent of a mainstream up-flow anaerobic sludge blanket

“…15 The sulfate ion is reduced to hydrogen sulfide in sewerage systems and anaerobic reactors through sulfate-reducing bacteria (SRB), using organic matter as the electron donor. The sulfide concentration mainly depends on the sulfate content in fresh sewage, which could have either an anthropic or natural origin 16 or be caused by seawater intrusion in ashore sewerage systems. 17 Sulfide is responsible for several environmental problems such as equipment corrosion, odor nuisances, deterioration of the receiving water bodies due to its chemical oxygen demand (COD) contribution, and inhibitory effect on biological processes.…”