Coupling membrane catalysis and biodegradation for nitric oxide removal in a novel hybird catalytic membrane biofilm reactor

A review: Biological technologies for nitrogen monoxide abatement

“…In MBRs where nitrification and aerobic denitrification were integrated, Wei et al (2016a) found that there was synergy between nitrifying and denitrifying bacteria, such as Nitrospira, Pseudomonas, Burkholderia, Burkholderia cepacia, Lysobacter, Beta proteobacterium, Alcaligenes sp., and Bacillus strains, which are nitrifying and denitrifying while predominating and converting nitrates (originating from NO) into nitrogen by denitrification in an MBR (Wei et al, 2016b). This is consistent with the observations of Zheng et al (2016), in which the aerobic denitrifying bacteria Pseudomonas putida sp.…”

“…Heterotrophic denitrification requires the addition of carbon sources, such as organic compounds, which function as electron donors and are used for cell growth (Rahimi et al, 2020). The most widely used of these carbon sources is glucose (Wei et al, 2016b); however, some studies have also used lactate (Lee and Sublette, 1991), dextrose (Barnes et al, 1995), acetate (Flanagan et al, 2002), sodium succinate (Yang et al, 2012), and aromatic compounds such as toluene (Du Plessis et al, 1998).…”

“…Recently, the most widely used configuration in NO denitrification has been membrane bioreactors (MBRs), which provide a large gasliquid surface to improve mass transfer characteristics (Zhang et al, 2013). The most studied MBR configurations include thermophilic reactors (Razaviarani et al, 2019;Wei et al, 2016a) and catalytic membrane reactors (CMRs) (Wei et al, 2016b(Wei et al, , 2019.…”

“…In most studies, bioreactors are operated at room temperature (Razaviarani et al, 2019;Wei et al, 2016b); however, flue gases are usually emitted at high temperatures, which is why Wei et al (2019) studied a thermophilic nitrification/denitrification MBR system between 45 and 60 • C. An efficient removal of NO could be obtained under these conditions as the bacteria acclimated to the hot flue gas and NO, reaching a maximum RE and EC of 95% and 1166 g m − 3 h − 1 , respectively, at 60 • C.…”

“…To reduce these problems, MBRs modified with new nanomaterials, coatings, and chemical grafting are currently being developed (Qin et al, 2018). For example, Wei et al (2016b) used a catalytic MBR to reduce EPS formation and facilitate long-term operation. Additionally, Ergas (2001) reported that biofouling problems are usually greater in microporous MBRs than in dense MBRs.…”