Nitrogen recovery from pig slurry in a two-chambered bioelectrochemical system

Sotres, Ana; Cerrillo, Míriam; Viñas, Marc; Blasi, August Bonmatí

doi:10.1016/j.biortech.2015.07.036

Cited by 63 publications

(38 citation statements)

References 33 publications

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“…In 2015, Sotres et al . compared the ammonia recovery from a BES unit working first in MFC mode and then MEC mode.…”

Section: Bioelectrochemical Systems Fed With Urinementioning

confidence: 99%

“…The anode was made of carbon felt mesh and the cathode consisted of a piece of stainless steel mesh. The system was fed with the liquid fraction of pig slurry and a stripping/absorption unit was integrated within the cathodic chamber for ammonia recovery from the catholyte . Their results showed that the BES exhibited higher COD removal rates and coulombic efficiency (CE) when the unit was working under MEC mode instead of MFC whilst the nitrogen flux through the membrane was similar.…”

Section: Bioelectrochemical Systems Fed With Urinementioning

confidence: 99%

“…Researchers are beginning to focus on optimising this parameter in order to enhance the overall recovery of ammonia and decrease energy consumption. [109][110] In 2015, Sotres et al [111] compared the ammonia recovery from a BES unit working first in MFC mode and then MEC mode. The BES consisted of a methacrylate double-chamber reactor where anodic and cathodic compartments were separated by a commercial cation exchange membrane (Ultrex CMI-7000).…”

Section: Microbial Electrolysis Cell (Mec) Using Urine For Nutrientmentioning

confidence: 99%

“…The system was fed with the liquid fraction of pig slurry and a stripping/ absorption unit was integrated within the cathodic chamber for ammonia recovery from the catholyte. [111] Their results showed that the BES exhibited higher COD removal rates and coulombic efficiency (CE) when the unit was working under MEC mode instead of MFC whilst the nitrogen flux through the membrane was similar. However, the Authors observed that by increasing the voltage applied when the system was working in MEC mode, the flux of nitrogen transfer to the cathode was higher, compared with MFC mode, reaching up to 25.5 gN d À 1 m À 2 when the voltage applied was 0.8 V. These results are in line with other research work previously published.…”

Section: Microbial Electrolysis Cell (Mec) Using Urine For Nutrientmentioning

confidence: 99%

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Urine in Bioelectrochemical Systems: An Overall Review

et al. 2020

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In recent years, human urine has been successfully used as an electrolyte and organic substrate in bioelectrochemical systems (BESs) mainly due of its unique properties. Urine contains organic compounds that can be utilised as a fuel for energy recovery in microbial fuel cells (MFCs) and it has high nutrient concentrations including nitrogen and phosphorous that can be concentrated and recovered in microbial electrosynthesis cells and microbial concentration cells. Moreover, human urine has high solution conductivity, which reduces the ohmic losses of these systems, improving BES output. This review describes the most recent advances in BESs utilising urine. Properties of neat human urine used in state‐of‐the‐art MFCs are described from basic to pilot‐scale and real implementation. Utilisation of urine in other bioelectrochemical systems for nutrient recovery is also discussed including proofs of concept to scale up systems.

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“…In 2015, Sotres et al . compared the ammonia recovery from a BES unit working first in MFC mode and then MEC mode.…”

Section: Bioelectrochemical Systems Fed With Urinementioning

confidence: 99%

Section: Bioelectrochemical Systems Fed With Urinementioning

confidence: 99%

Section: Microbial Electrolysis Cell (Mec) Using Urine For Nutrientmentioning

confidence: 99%

Section: Microbial Electrolysis Cell (Mec) Using Urine For Nutrientmentioning

confidence: 99%

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Urine in Bioelectrochemical Systems: An Overall Review

et al. 2020

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“…7 Two of the newest technologies aiming for the recovery of total ammonia nitrogen [TAN; the sum of NH 3 and ammonium (NH 4 + ) nitrogen] from wastewaters are electrochemical systems (ES) and bioelectrochemical systems (BES). 3,[7][8][9] In order to recover a cleaner, purer product, these systems are usually coupled to stripping-absorption units [10][11][12][13][14] or gas-permeable hydrophobic membrane units (TransMembrane ChemiSorption or TMCS). [15][16][17][18][19] The main advantage of these integrated systems is their sustainability: there is no need for the addition of chemicals such as caustics, and useful by-products are obtained (such as electricity or hydrogen).…”

Section: Introductionmentioning

confidence: 99%

The concept of load ratio applied to bioelectrochemical systems for ammonia recovery

Arredondo

Kuntke²,

Heijne

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The load ratio is a crucial parameter to optimize the current driven recovery of total ammonia nitrogen (TAN) from urine. The load ratio is the ratio between the current density and the TAN loading rate. It is currently not known if the load ratio concept applies to a bioelectrochemical system (BES) because the current density and TAN loading rate cannot be controlled independently. RESULTS We found a clear increasing trend in TAN removal efficiency with respect to load ratio in the BES for both human and synthetic urine. The maximum TAN removal efficiency was 60.9% at a load ratio of 0.7, corresponding to a TAN transport rate of 119 gN m−2 day−1 at an electrical energy input of 1.9 kWh kgN−1 (synthetic urine). Low load ratios (<1) were obtained, indicating that the current was not enough to transport all the TAN across the membrane. CONCLUSIONS BES and ES show the same general relationship between TAN removal efficiency and load ratio. Therefore, given a stable current density, the concept of load ratio can also predict the TAN removal efficiency in BES. Higher current densities, and insights into the factors limiting current, are needed to increase the load ratio and therefore the TAN removal efficiency. © 2019 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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