Effect of upflow velocity on the effluent membrane fouling potential in membrane coupled upflow anaerobic sludge blanket reactors

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

“…The SMY obtained in this work were in accordance with values reported in literature. The SMP obtained by Ozgun et al, (2013b), in an UASB reactor working at 25 ± 2ºC and fed with synthetic wastewater, was 0.13 Nm 3 CH 4 /kg COD removed and 0.11 Nm 3 CH 4 /kg COD removed at an upflow velocity of 1.2 m/h and 0.6 m/h, respectively. Gao et al, (2014) obtained a SMY of 0.19 L CH 4 /g COD removed , 0.19 L CH 4 /g COD removed , and 0.14 L CH 4 /g COD removed working at temperature of 35ºC, 25ºC and 15ºC respectively, with municipal wastewater.…”

Impact of temperature on feed-flow characteristics and filtration performance of an upflow anaerobic sludge blanket coupled ultrafiltration membrane treating municipal wastewater

“…The feed solution was prepared in concentrated form and stored in a refrigerator at 4 C. Macronutrient and micronutrient solution compositions were slightly modified from the recipes in the studies of Aiyuk and Verstraete (2004) and Martin et al (2010), respectively. The composition of the concentrated substrate solution is shown in Table 1 (Ozgun et al, 2013a). The concentrated feed solution was diluted with tap water before being fed into the bioreactor.…”

“…Besides, higher EPS production associated with biomass due to the more intimate exposure of the membranes to biomass may increase fouling (Liao et al, 2006). Given this case, UASB reactors have recently attracted more interest as a part of AnMBRs (Ozgun et al, 2013a;Gao et al, 2010;Liu et al, 2012). Membrane coupled UASB reactors may be a promising approach to overcome problems related with excessive fouling.…”

“…Briefly, several factors involved in design and operation may influence fouling such as set-up configuration and membrane characteristics, feeding and biomass properties and operational conditions (Gao et al, 2010;Salazar-Pelaez et al, 2011a). Among them, reactor design is proposed as an important factor that can change the AnMBR fouling propensity (Ozgun et al, 2013a). Most of AnMBRs studied employ completely stirred tank reactor (CSTR) because of the ease of construction and use (Liao et al, 2006).…”

Sewage treatment by an UAFB–EGSB biosystem with energy recovery and autotrophic nitrogen removal under different temperatures

“…However, some drawbacks such as the request for high energy, large footprint and the emission of greenhouse gas (Grady et al, 2011) slowed down the development of it and urged us to think about a more sustainable way to treat sewage. Anaerobic digestion has been applied to treat both industrial and municipal wastewater in main stream for a long time (McCarty, 2001;Ozgun et al, 2013;Wen et al, 2011). However, some side stream processes are needed to polish the anaerobic digestion (AD) effluent for lower N and P concentration.…”