pH-dependent ammonia removal pathways in microbial fuel cell system

Kim, Taeyoung; An, Junyeong; Lee, Hyeryeong; Jang, Jae Kyung; Chang, In Seop

doi:10.1016/j.biortech.2016.03.167

Cited by 48 publications

(6 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In comparison to the pH profiles in a non-hybrid dual chamber MFC done in the previous study, similar trend can be observed when operated in the range of [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] C and 20-35 C where the pH of the fresh feed (pH 7.4) reached the minimum value of about 6.2 and 6.7, respectively after operated for 20-25 h before the pH started to move up slowly and finally became almost constant [39]. Nevertheless, it is very difficult to compare this performance with the current study because the previous study was done in a wide range of operating temperatures whereas in the current study, the pH profiles was obtained at each specific operating temperatures.…”

Section: Ph Profilessupporting

confidence: 57%

“…Nevertheless, standalone treatment system has limitation such as less wastewater treatment efficiency as compared to the MFC hybrid system [7]. Much studies had demonstrated the ability of hybrid MFCs in removing various types of pollutants present in the wastewater such as chemical oxygen demand (COD) [8][9][10], phosphorus [11], dye [12,13], suspended solids (SS) [10], total nitrogen (TN) [14], ammonia nitrogen (NH 3 À ÀN) [15,16], and so on. Majority of the effective pollutants removal were done by integrating MFC with other unit operation or processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Tee

Abdullah

Tan

et al. 2017

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

A B S T R A C TA cost effective single-chamber microbial fuel cell (MFC) integrated with adsorption system was tested under different operating temperatures to observe pH profiles, organics, solids, nutrients, color and turbidity removal and power density generation. The optimum operating temperature range was found to be $25-35 C with majority of the removals achieved at $35 C. Maximum power density recorded was 74 AE 6 mW/m 3 with coulombic efficiency (CE) of 10.65 AE 0.5% when operated at 35 C. Present studies had successfully demonstrated the effectiveness of a hybrid system in removing various types of pollutants in POME at optimum temperature and able to fulfill the stringent effluent discharge limit. Chemical oxygen demand (COD), total solids (TS) and turbidity removals increase linearly with temperatures with removal efficiency of 0.5889% C À1 , 1.0754% C À1 and 0.7761% C À1, respectively. The temperature coefficient (Q 10 ) is found to be 1.06, 1.45 and 1.09, respectively. Besides, MFC-adsorption hybrid system had demonstrated superior stability over a wide range of operating temperatures in terms of COD removal as compared to the non-integrated MFC system.

show abstract

Section: Ph Profilessupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Tee

Abdullah

Tan

et al. 2017

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…It has been reported that biological NH 4 + removal in MFCs is more efficient than NH 4 + removal via an abiotic electrochemical pathway ( 40 ) and that NH 4 + removal can be enhanced by implementing the Feammox process in air-cathode MFCs ( 41 ). However, none of those studies identified the microorganisms that were responsible for the NH 4 + removal.…”

Section: Discussionmentioning

confidence: 99%

Electrode Colonization by the Feammox Bacterium Acidimicrobiaceae sp. Strain A6

Ruiz-Urigüen

Shuai

Jaffé

2018

Appl Environ Microbiol

View full text Add to dashboard Cite

Most studies on electrogenic microorganisms have focused on the most abundant heterotrophs, while other microorganisms also commonly present in electrode microbial communities, such as Actinobacteria strains, have been overlooked. The novel Acidimicrobiaceae sp. strain A6 (Actinobacteria) is an iron-reducing bacterium that can colonize the surface of anodes in sediments and is linked to electrical current production, making it an electrode-reducing bacterium. Furthermore, A6 can carry out anaerobic ammonium oxidation coupled to iron reduction. Therefore, findings from this study open the possibility of using electrodes instead of iron as electron acceptors, as a means to promote A6 to treat NH4+-containing wastewater more efficiently. Altogether, this study expands our knowledge of electrogenic bacteria and opens the possibility of developing Feammox-based technologies coupled to bioelectric systems for the treatment of NH4+ and other contaminants in anoxic systems.

show abstract

“…Possible ammonia removal mechanisms include ammonia volatilization through the air-cathode into the air (Kim et al 2008), and nitrogen removal by biological nitrification and denitrification that uses residual oxygen unconsumed in oxygen reduction reaction at the cathode (Yan et al 2012). Generally, a widely supported hypothesis is that these two processes are concurrent (Kim et al 2008;Lu et al 2009;Ahn and Logan, 2010;Yan et al 2012;Song et al 2015;Kim et al 2016;Park et al 2017), and most importantly, the volatilization accounts for a major portion of ammonia removal (Kim et al 2008;Ahn and Logan, 2010;Yan et al 2012;Li et al 2015). In single-chamber MFCs, hydroxide ions produced in oxygen reduction reaction (O 2 + 2H 2 O + 4e − → 4OH − ) at the cathode (Fornero et al 2010) cause a localized pH increase near the cathode (Popat et al 2012;Yuan et al 2013;Motoyama et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Is ammonia volatilization a main mechanism of ammonia loss in single-chamber microbial fuel cells?

Motoyama

Ichihashi

Hirooka

2020

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

It has been hypothesized that ammonia removal is primarily due to ammonia volatilization through the air-cathode in singlechamber microbial fuel cells. This hypothesis was supported by the "abiotic tests" with microbial fuel cells. In our reproduced abiotic test, the same extent of decrease in ammonia concentration was observed regardless of gas permeability through the air-cathode. In an experiment replacing chloride ions with sulfate ions in wastewater, almost no decrease in ammonia concentration was observed. These results suggest ammonia loss in the "abiotic tests" was mostly driven by electrochemical oxidation due to chloride ions also present in the solution. When the pH of the synthetic wastewater was made equivalent to that near the cathode of electricity-generating microbial fuel cell but without an applied voltage, a decrease in ammonia concentration was observed. The result suggests that the hypothesized ammonia volatilization through the air-cathode does occur and contribute to ammonia loss to some extent.

show abstract

pH-dependent ammonia removal pathways in microbial fuel cell system

Cited by 48 publications

References 27 publications

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Electrode Colonization by the Feammox Bacterium Acidimicrobiaceae sp. Strain A6

Is ammonia volatilization a main mechanism of ammonia loss in single-chamber microbial fuel cells?

Contact Info

Product

Resources

About