Reactor performance in terms of COD and nitrogen removal and bacterial community structure of a three-stage rotating bioelectrochemical contactor

Sayess, R.; Saikaly, Pascal E.; El‐Fadel, Mutasem; Li, Dong; Semerjian, Lucy

doi:10.1016/j.watres.2012.11.023

Cited by 87 publications

(36 citation statements)

References 54 publications

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“…These imply that the members of Betaproteobacteria were functionally relevant to denitrification in the systems studied. The dominance of Betaproteobacteria was consistent with identification in other reported denitrifying treatment systems (Morgan-Sagastume et al, 2008;Wrighton et al, 2014;Sayess et al, 2013). The analyses based on the genus level can allow to further verify the function evolution of the community.…”

Section: Bacterial Taxonomic Identificationsupporting

confidence: 86%

Sulfur-based mixotrophic denitrification corresponding to different electron donors and microbial profiling in anoxic fluidized-bed membrane bioreactors

Zhang

et al. 2015

Water Research

148

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a b s t r a c tSulfur-based mixotrophic denitrifying anoxic fluidized bed membrane bioreactors (AnFB-MBR) were developed for the treatment of nitrate-contaminated groundwater with minimized sulfate production. The nitrate removal rates obtained in the methanol-and ethanol-fed mixotrophic denitrifying AnFB-MBRs reached 1.44e3.84 g NO 3 À eN/L reactor d at a hydraulic retention time of 0.5 h, which were significantly superior to those reported in packed bed reactors. Compared to methanol, ethanol was found to be a more effective external carbon source for sulfur-based mixotrophic denitrification due to lower sulfate and total organic carbon concentrations in the effluent. Using pyrosequencing, the phylotypes of primary microbial groups in the reactor, including sulfur-oxidizing autotrophic denitrifiers, methanol-or ethanol-supported heterotrophic denitrifiers, were investigated in response to changes in electron donors. Principal component and heatmap analyses indicated that selection of electron donating substrates largely determined the microbial community structure. The abundance of Thiobacillus decreased from 45.1% in the sulfur-oxidizing autotrophic denitrifying reactor to 12.0% and 14.2% in sulfur-based methanol-and ethanol-fed mixotrophic denitrifying bioreactors, respectively. Heterotrophic Methyloversatilis and Thauera bacteria became more dominant in the mixotrophic denitrifying bioreactors, which were possibly responsible for the observed methanol-and ethanol-associated denitrification.

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Section: Bacterial Taxonomic Identificationsupporting

confidence: 86%

Sulfur-based mixotrophic denitrification corresponding to different electron donors and microbial profiling in anoxic fluidized-bed membrane bioreactors

Zhang

et al. 2015

Water Research

148

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“…It was recently shown that nitrate and also nitrite could effectively be used to drive current generation and simultaneous carbon and nitrogen removal. Intensive studies have been carried out to determine the feasibility of carbon and nitrogen removal using MFCs (Feng et al, 2015;Mook et al, 2012;Ryu et al, 2013;Sayess et al, 2013;Virdis et al, 2010;Xie et al, 2011;Zhang et al, 2013). Removal of carbon and nitrogen from food, swine, and aquaculture wastewater using MFCs has been increasingly reported (Blanchet et al, 2015;ElMekawy et al, 2015;Lim et al, 2012;Ryu et al, 2013;Vilajeliu Pons et al, 2015).…”

Section: Simultaneous Carbon and Nitrogen Removal Using Mfcsmentioning

confidence: 99%

“…Ryu et al (2013) reported a loop configuration MFC which was used to eliminate the pH gradient, and COD and nitrogen removal rates of 0.523 and 0.194 kg/m 3 /day were achieved, while generating a stable power density of 1081.6 mW/m 3 . A three-stage rotating bioelectrochemical contactor, integrating an MFC with rotating biological contactor (RBC) technology, was constructed for the removal of carbon and nitrogen, and it was found that the RBC-MFC unit presented better nitrogen removal compared to the RBC unit (Sayess et al, 2013). An MFC system coupled with an …”

Section: Improvement Of the Electrode Materials And Reactor Configuramentioning

confidence: 99%

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Sun

Zhuang

et al. 2016

Journal of Environmental Sciences

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“…In order to further save the energy costs and improve the performance of RBCs, great effort has been spent on modifying RBCs configuration, such as self-rotating discs [22,23], net-like rotating biological contactor [24], and RBC-MFC [25]. Self-rotating discs (SRDs) are cost-effective devices to improve the self-purification efficiency of water stream via increasing dissolved oxygen in the water stream with natural mechanical energy of rivers [22].…”

Section: Introductionmentioning

confidence: 99%

“…Knowledge regarding the microbial consortia in biological systems is of great importance for comprehensive understanding the performance and stability of biological reactors [26,27]. In recent years, molecular biology tools have been widely developed to determine the microbial communities in the wastewater treatment [15,25,26]. It is necessary to identify the microbial compositions and structures of novel biological reactors by this way.…”

Section: Introductionmentioning

confidence: 99%

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Li¹,

Lü²

2017

Water

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Abstract:Recently, more decentralized wastewater treatments are of great interest for rural regions. In this work, a novel ANF-WDSRBC system combined with an anoxic filter (ANF) and a four-stage water-dropping-self-rotating biological contactor (WDSRBC) was designed as a post-treatment option. With a total hydraulic retention time (HRT) of 8.8 h and reflux ratio of 1:1, the ANF-WDSRBC system was operated 160 days. The results showed the ANF-WDSRBC system had better performance without mechanical aeration devices, the removal efficiencies of chemical oxygen demand (COD), ammonia (NH 4 + -N) and total nitrogen (TN) were 61.4% ± 4.3%, 86.1% ± 3.7%, and 54.5% ± 3.9%, respectively. By means of high-throughput MiSeq sequencing, the results suggested that Proteobacteria, Bacteroidetes, Firmicutes, and Chloroflexi were the predominant phyla in the system. In the WDSRBC units, Nitrosomonas, Nitrosospira, Bacillus, and Nitrospira were the main genera to take part in nitrification. Longilinea, Bellilinea, Thiobacillus, and Thauera in the ANF unit were the main genera to participate in denitrification and organic matters degradation. The novel ANF-WDSRBC system had great potential in the post-treatment of decentralized domestic wastewater.

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Reactor performance in terms of COD and nitrogen removal and bacterial community structure of a three-stage rotating bioelectrochemical contactor

Cited by 87 publications

References 54 publications

Sulfur-based mixotrophic denitrification corresponding to different electron donors and microbial profiling in anoxic fluidized-bed membrane bioreactors

Sulfur-based mixotrophic denitrification corresponding to different electron donors and microbial profiling in anoxic fluidized-bed membrane bioreactors

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

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