Long-term operation of a pilot scale anaerobic membrane bioreactor (AnMBR) for the treatment of municipal wastewater under psychrophilic conditions

Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment

“…Low temperature might increase the wastewater viscosity, slow down the rate of biological reaction, and decrease COD removal efficiency. Compared to the previous study with elastic fiber carriers in two-stage anaerobic filter for domestic wastewater treatment [12], the COD removal efficiency in this study was better, which may be because the wool felt carrier enhanced the agglomeration of the microbial community in the AWFR system. Overall, the performance of the AWFR system was relatively stable and the COD removal efficiency was higher in summer than in winter.…”

“…Upflow anaerobic sludge blanket reactors (UASB) [8,9], anaerobic baffled reactor (ABR) [10], and anaerobic membrane bioreactor (AnMBR) [7,11,12] are commonly used to treat domestic wastewater. Despite the effective chemical oxygen demand (COD) removal by these anaerobic biotechnologies, some challenges still exist, such as complex three-phase separator and long solids' retention time of UASB, membrane fouling and high energy costs of AnMBR, and high land footprint of ABR.…”

A novel configuration for an anaerobic submerged membrane bioreactor (AnSMBR). Long-term treatment of municipal wastewater under psychrophilic conditions

“…Depending on the type of the reactor or the degree of mixing, the placement of the membrane inside the reactor or inside an external tank could contribute in different ways to the fouling of the membrane, and therefore to the different energy consumption in long-term maintenance. In a previous study, Gouveia et al (2015), operating a pilot scale AnMBR with a submerged membrane located in an external tank connected to the upflow anaerobic sludge blanket reactor (UASB), observed an accumulation of solids at the bottom of the membrane module. This suspension showed poor flow ability and sedimentability characteristics, impeding its recirculation to the UASB reactor, thus preventing adequate contact with the active biomass and consequently its possible biodegradation.…”

Evaluation and characterization during the anaerobic digestion of high-strength kitchen waste slurry via a pilot-scale anaerobic membrane bioreactor

“…Moreover, since many wastewaters have characteristics that may limit the stable formation of microbial aggregates, AnMBRs also have great potential for the treatment of extreme organic wastewaters or slurries where the conventional granular sludge bed systems fail to retain highly active anaerobic biomass in the reactors (Van Lier et al, 2001). Recently, AnMBRs have been utilized to treat real industrial wastewaters in some researches, and the investigations about their dynamics, performance, stability and membrane fouling show that the anaerobic biotechnology has a good application prospect (Shin et al, 2014;Gouveia et al, 2015;Wang et al, 2013). Nevertheless, since the complexity, interaction and impact of various organic and inorganic compounds present in different real wastewaters, the availability and performance of AnMBRs still requires further investigation.…”