Evaluation of anammox biocathode in microbial desalination and wastewater treatment

Kokabian, Bahareh; Gude, Veera Gnaneswar; Smith, Renotta K.; Brooks, John P.

doi:10.1016/j.cej.2018.02.088

Cited by 70 publications

(24 citation statements)

References 37 publications

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“…Maximum power density increased with continued fed-batch cycles, demonstrating a noticeable enhancement in the biocatalytic activity of the biofilm. These results indicated that the current density was improved mainly due to the formation of exoelectrogenic biofilms on the anode electrodes 17 . Polarization tests were conducted for each cycle as shown in Fig.…”

Section: Resultsmentioning

confidence: 90%

“…Recently, Kokabian et al . 17 reported a proof-of-concept study to demonstrate that anammox bacteria can be used as biocatalysts in MDCs to provide bioelectrochemical removal of carbon and nitrogen compounds from wastewater with electricity generation. A maximum power density of 0.092 W/m 3 and >90% NH 4 + -N removal was achieved with an initial NO 2 − concentration of 100 mg/L in the anammox biocathode.…”

Section: Introductionmentioning

confidence: 99%

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Accomplishing a N-E-W (nutrient-energy-water) synergy in a bioelectrochemical nitritation-anammox process

Ghimire

Gude

2019

Sci Rep

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This study reports an investigation of the concept, application and performance of a novel bioelectrochemical nitritation-anammox microbial desalination cell (MDC) for resource-efficient wastewater treatment and desalination. Two configurations of anammox MDCs (anaerobic-anammox cathode MDC (AnA mox MDC) and nitration-anammox cathode MDC (NiA mox MDC)) were compared with an air cathode MDC (CMDC), operated in fed-batch mode. Results from this study showed that the maximum power density produced by NiA mox MDC (1,007 mW/m 3 ) was higher than that of AnA mox MDC (444 mW/m 3 ) and CMDC (952 mW/m 3 ). More than 92% of ammonium-nitrogen (NH 4 + -N) removal was achieved in NiA mox MDC, significantly higher than AnA mox MDC (84%) and CMDC (77%). The NiA mox MDC performed better than CMDC and AnA mox MDC in terms of power density, COD removal and salt removal in desalination chamber. In addition, cyclic voltammetry analysis of anammox cathode showed a redox peak centered at −140 mV Vs Ag/AgCl confirming the catalytic activity of anammox bacteria towards the electron transfer process. Further, net energy balance of the NiA mox MDC was the highest (NiA mox MDC-0.022 kWh/m 3 >CMDC-0.019 kWh/m 3 >AnA mox MDC-0.021 kWh/m 3 ) among the three configurations. This study demonstrated, for the first time, a N-E-W synergy for resource-efficient wastewater treatment using nitritation-anammox process.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Accomplishing a N-E-W (nutrient-energy-water) synergy in a bioelectrochemical nitritation-anammox process

Ghimire

Gude

2019

Sci Rep

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“…In addition to the aforementioned PCR assays, qPCR of the 16S rRNA gene was also conducted. Briefly, a 25 µL reaction mixture containing 12.5 µL ABI Syber Green Master mix, 0.5 µL of primers, and 2 µL of template DNA in conjunction with universal 16S rRNA primers as stated in .…”

Section: Methodsmentioning

confidence: 99%

Resource recovery from low strength wastewater in a bioelectrochemical desalination process

Stuart-Dahl

Martinez‐Guerra

Kokabian

et al. 2019

Engineering in Life Sciences

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In this research, low strength synthetic wastewaters with chemical oxygen demand less than 300 mg L−1 were treated at different concentrations in a bioelectrochemical desalination process. A process optimization model was utilized to study the performance of the photosynthetic bioelectrochemical desalination process. The variables include substrate (chemical oxygen demand) concentration, total dissolved solids, and microalgae biomass concentration in the cathode chamber. Relationships between the chemical oxygen demand concentration, microalgae, and salt concentrations were evaluated. Power densities and potential energy benefits from microalgal biomass growth were discussed. The results from this study demonstrated the reliability and reproducibility of the photosynthetic microbial desalination process performance followed by a response surface methodology optimization. This study also confirms the suitability of bioelectrochemical desalination process for treating low substrate wastewaters such as agricultural wastewaters, anaerobic digester effluents, and septic tank effluents for net energy production and water desalination.

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“…High cost and toxicity problems when using noble catalysts and chemical electrolytes. So, to avoid that, biocathodes can be used as an alternative to abiotic cathodes [10][11][12][13][14]. Another advantage of using different biocathodes is that the active microbial metabolism can be used to produce beneficial products [15] or eliminate nutrients from wastewaters, such as nitrate and contaminants such as heavy metals [16,17].…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Microbial Desalination Cell to Treat Oily Wastewater Using Microalgae Chlorella Vulgaris

2019

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Microbial desalination cell (MDC) offers a new and sustainable approach to desalinate saltwater by directly utilizing the electrical power generated by bacteria during organic matter oxidation. In this study, we used microalgae Chlorella Vulgaris in the cathode chamber to produce oxygen as an electron accepter by photosynthesis process for generate bioelectricity power and treat oil refinery wastewater by microorganisms in both anode and cathode.The power density generated by this Photosynthetic Microbial Desalination Cell (PMDC) with 1KΩ external resistance at the first 4th hr. of operation period was 0.678 W/m3 of anode volume and 0.63 W/m3 of cathode volume. It increased after one day to a peak value of (4.32 W/m3 of anode volume and 4.013 W/m3 of cathode volume). The microalgae growth in the biocathode chamber followed in terms of optical density. The optical density increased from 0.546 at the beginning of the system operation to 1.71 after 24 days of operation period. The percentage removal of chemical oxygen demand (COD) of oil refinery wastewater was 97.33% and 79.22% in anode and cathode chamber, respectively. The microalgae in the biocathode were able to remove volatile compounds causing odor from the influent wastewater. TDS removal rate 159.722 ppm/h with initial TDS in desalination chamber of 35000 ppm.

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Evaluation of anammox biocathode in microbial desalination and wastewater treatment

Cited by 70 publications

References 37 publications

Accomplishing a N-E-W (nutrient-energy-water) synergy in a bioelectrochemical nitritation-anammox process

Accomplishing a N-E-W (nutrient-energy-water) synergy in a bioelectrochemical nitritation-anammox process

Resource recovery from low strength wastewater in a bioelectrochemical desalination process

Photosynthetic Microbial Desalination Cell to Treat Oily Wastewater Using Microalgae Chlorella Vulgaris

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