Ammonia recovery from acidogenic fermentation effluents using a gas-permeable membrane contactor

Serra-Toro, Andreu; Vinardell, Sergi; Astals, Sergi; Madurga, Sergio; Llorens, J.; Mata‐Alvarez, J.; Mas, Francesc; Dosta, J.

doi:10.1016/j.biortech.2022.127273

Cited by 16 publications

(5 citation statements)

References 34 publications

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“…Many rumen microbes use NH 3 to synthesize microbial proteins, which makes it an important indicator of the internal environment of the rumen [10] . NH 3 is liberated and converted to ammonia [11] . Ration formulations with lower RDP and RAC ratios produce fluctuating NH 3 .…”

Section: Resultsmentioning

confidence: 99%

The balance of rumen degradable protein and readily available carbohydrate in sheep rations on in vitro fermentability

Yunilas,

Zain,

Tanuwiria

et al. 2024

J Adv Vet Anim Res

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Objective: Protein and carbohydrates are substances needed by ruminants, especially sheep. Providing protein and carbohydrates must pay attention to their degradation. In addition, balancing nutrients to meet the nutritional needs of rumen microbes is very important because the unbalanced availability of rumen degradable protein (RDP) and readily available carbohydrate (RAC) at one time can cause suboptimal microbial protein synthesis efficiency. Materials and Methods: Completely randomized design with a nonfactorial pattern of five treatments with three replications. Treatment includes RDP and RAC ratios, namely R1 = 2.30, R2 = 2.00, R3 = 1.70, R4 = 1.50, and R5 = 1.30. Results: The results showed that the balance of RDP and RAC in sheep ration formulation in vitro had a very significant effect (p < 0.01) on NH3, microbial protein synthesis, total gas, total microbes, and organic matter digestibility (OMD) but had no significant effect (p > 0.05) on rumen pH and dry matter digestibility (DMD). Conclusion: The optimal balance of RDP and RAC in the formulation of sheep rations in vitro was obtained at a ratio of 2.30 with NH3 (mM) 8.47, rumen pH 5.97, microbial protein synthesis (mg/100 ml) 123, gas (ml/g of material) 145, total microbes (cells/ml) 2.012 × 106, (log CFU cells/ml) 6.3025, DMD 61.0%, and OMD 63.1%.

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Section: Resultsmentioning

confidence: 99%

The balance of rumen degradable protein and readily available carbohydrate in sheep rations on in vitro fermentability

Yunilas,

Zain,

Tanuwiria

et al. 2024

J Adv Vet Anim Res

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“…In the gas phase, the highest amount of fixed N 2 was achieved at 60 min, which consisted of 14.16 mmol of NO x (g) and 0.35 mmol of NH 3 (NH 3(g) ), whereas at 20 min, only 2.68 and 0.18 mmol, respectively, were produced. However, because the recovery of both products was complicated, it was conducted using absorption or membrane methods that were expensive and time‐consuming 43–45 . In the future, the optimization of air N 2 fixation processes should focus on products dissolved in the liquid phase, including NO 3 − , NO 2 − , NO x , and NH 3 , the recovery of which is effective and economical.…”

Section: Resultsmentioning

confidence: 99%

“…However, because the recovery of both products was complicated, it was conducted using absorption or membrane methods that were expensive and time-consuming. [43][44][45] In the future, the optimization of air N 2 fixation processes should focus on products dissolved in the liquid phase, including NO 3 À , NO 2 À , NO x , and NH 3 , the recovery of which is effective and economical. In future research, gas-phase fixed N 2 products, including NO x and NH 3 , could be reinjected into the plasma zone with air to enhance the optimization of fixed N 2 production in the liquid phase.…”

Section: Air N 2 Fixation In Liquid and Gas Phasesmentioning

confidence: 99%

Fixation of air nitrogen to ammonia and nitrate using cathodic plasma and anodic plasma in the air plasma electrolysis method

Saksono,

Suryawinata,

Zakaria

et al. 2023

Env Prog and Sustain Energy

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The fixation of nitrogen (N2) from the air into ammonia (NH3) and nitrate (NO3−) is usually conducted using the Haber–Bosch process, which requires the raw material of hydrocarbons for hydrogen (H2), which has a large amount of energy but produces high CO2 emissions. An environmentally friendly and energy‐saving alternative is the air plasma electrolysis method, which can be used to synthesize NH3 and NO3− under ambient conditions. In this study, this method was used to inject air into the plasma zone in a K2SO4 electrolyte solution to produce N2 fixation compounds. The results showed that the use of cathodic plasma promoted the formation of NH3 but suppressed NO3− production. The optimal air injection rate was achieved at 0.6 L.min−1 and an electrical power of 452 W, with a total fixed N2 of 51.66 mmol. The highest formation of NO3− in cathodic plasma was obtained in 35 min, with a value of 29.92 mmol, and 2.57 mmol NH3 was achieved at 60 min. The high concentration of H2 gas, which is a by‐product of this process, can contribute to increasing the use of Haber–Bosch green technology in the production of NH3.

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“…Therefore, to allow the uncoupled C/N feeding and, consequently, improve the culture enrichment and PHA production, dedicated strategies to remove or decrease the nitrogen content in the feedstock should be implemented. A promising approach for this purpose is the use of membrane separation techniques, such as electrodialysis [ 10 ], forward osmosis [ 11 ], gas-permeable membrane contactors [ 12 ], and membrane extraction [ 13 ]. Another membrane process that can be used for this purpose is Donnan dialysis, which is an environment-friendly process that allows for the separation and recovery of target ionic species.…”

Section: Introductionmentioning

confidence: 99%

Donnan Dialysis for Recovering Ammonium from Fermentation Solutions Rich in Volatile Fatty Acids

et al. 2023

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For the production of polyhydroxyalkanoates (PHA) using nitrogen-rich feedstocks (e.g., protein-rich resources), the typical strategy of restricting cell growth as a means to enhance overall PHA productivity by nitrogen limitation is not applicable. In this case, a possible alternative to remove the nitrogen excess (NH4+/NH3) is by applying membrane separation processes. In the present study, the use of Donnan dialysis to separate ammonium ions from volatile fatty acids present in the media for the production of PHA was evaluated. Synthetic and real feed solutions were used, applying NaCl and HCl receiver solutions separated by commercial cation-exchange membranes. For this specific purpose, Fumasep and Ralex membranes showed better performance than Ionsep. Sorption of ammonium ions occurred in the Ralex membrane, thus intensifying the ammonium extraction. The separation performances with NaCl and HCl as receiver solutions were similar, despite sorption occurring in the Ralex membrane more intensely in the presence of NaCl. Higher volumetric flow rates, NaCl receiver concentrations, and volume ratios of feed:receiver solutions enhanced the degree of ammonium recovery. The application of an external electric potential difference to the two-compartment system did not significantly enhance the rate of ammonium appearance in the receiver solution. The results obtained using a real ammonium-containing solution after fermentation of cheese whey showed that Donnan dialysis can be successfully applied for ammonium recovery from such solutions.

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Ammonia recovery from acidogenic fermentation effluents using a gas-permeable membrane contactor

Cited by 16 publications

References 34 publications

The balance of rumen degradable protein and readily available carbohydrate in sheep rations on in vitro fermentability

The balance of rumen degradable protein and readily available carbohydrate in sheep rations on in vitro fermentability

Fixation of air nitrogen to ammonia and nitrate using cathodic plasma and anodic plasma in the air plasma electrolysis method

Donnan Dialysis for Recovering Ammonium from Fermentation Solutions Rich in Volatile Fatty Acids

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