Ammonia Removal by Simultaneous Nitrification and Denitrification in a Single Dual-Chamber Microbial Electrolysis Cell

Kondaveeti, Sanath; Choi, Dae-Hyeon; Noori, Md. T.; Min, Booki

doi:10.3390/en15239171

Cited by 7 publications

(2 citation statements)

References 51 publications

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“…On their side, the remaining stock solutions were stored at 4 • C in closed plastic containers. The relatively low TMN concentration compared to the typical N concentration found in hydroponic solution (80-200 mg/L N) was chosen to limit TAN concentration, similar to what can be done in wastewater treatment plants to biologically remove N since free NH 3 can inhibit ammonia oxidizers and nitrifiers [55,62].…”

Section: Plant Materials and Growing Conditionsmentioning

confidence: 99%

Development of a Simple Bioponic Method Using Manure and Offering Comparable Lettuce Yield than Hydroponics

Szekely,

Zeaiter,

Jijakli

2023

Water

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Using locally accessible organic materials as fertilizers in hydroponics can represent a sustainable alternative to the synthetic mineral fertilizers typically used. This study aimed at developing a simple bioponic method using chicken or goat manure on lettuce (Lactuca sativa var. Lucrecia) in the nutrient film technique, requiring few inputs. The first experiment compared nutrient solutions made from chicken or goat droppings and mineral fertilizers in terms of physico-chemical parameters, plant yields, and shoot mineral content. Organic solutions were produced in two main stages before being used on plants: (1) a simple manure maceration in water to produce stock solution, followed by (2) an aerobic digestion of the filtrated and diluted stock solution according to the total mineral nitrogen (TMN). The second experiment compared different concentrations of chicken manure stock solution (60, 80, 100, or 120 mg/L TMN) to a control mineral solution. In the first experiment, both organic treatments resulted in yields significantly lower than those of the control, probably due to nitrogen scarcity. In the second experiment, all organic treatments resulted in wet and dry shoot masses similar to those obtained with the inorganic control treatment. Produce quality was also improved, with lower shoot nitrate content. Important nitrogen losses occurred in the organic solutions during aerobic digestion, particularly in the goat treatment and in the highly concentrated treatments in stock solution during the 2nd experiment (~50–65% TMN losses). This was probably caused by the presence of residual organic matter, which resulted in excessive microbial development. It can be concluded that chicken and goat manure are suitable fertilizers for lettuce hydroponic production using this method; however, further research should be carried out to improve mineralization during digestion steps.

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Section: Plant Materials and Growing Conditionsmentioning

confidence: 99%

Development of a Simple Bioponic Method Using Manure and Offering Comparable Lettuce Yield than Hydroponics

Szekely,

Zeaiter,

Jijakli

2023

Water

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“…The maximum removal efficiencies of chemical oxygen demand (COD), NH 4 + -N, and total nitrogen (TN) are above 90%; meanwhile, the maximum columbic efficiency (CE) increases to 69.2%. Major studies have remarked that nitrogen removal in SCMFCs is consistent with conventional nitrification and denitrification [22,23]; however, a few researchers have thought that bioelectrochemical denitrification plays a key role in a denitrifying MFC (DNMFC) for low-COD wastewater treatment [24,25].…”

Section: Introductionmentioning

confidence: 99%

The Important Role of Denitrifying Exoelectrogens in Single-Chamber Microbial Fuel Cells after Nitrate Exposure

Jin,

Wang,

Yan

et al. 2024

Separations

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Wastewater treatment using microbial fuel cells (MFCs) is a potentially useful technology due to its low cost, environmental friendliness, and low sludge production. In this study, a single-chambered air cathode MFC (SCMFC) was developed and investigated regarding its performance and microbial community evolution following nitrate exposure. During long-term operation, diverse denitrifiers accumulated on the electrodes to form a denitrifying MFC (DNMFC) with stable activity for nitrate reduction. The DNMFC presented considerably higher electroactivity, stability, and denitrification rates than the SCMFC. Though energy recovery decreased in the DNMFC by partial organics utilized for heterotrophic denitrification, the electron transfer efficiency increased. Geobacter as the absolutely dominant genus in the SCMFC anode was eliminated and replaced by Azonexus and Pseudomonas in the DNMFC. Furthermore, the biomass of Pseudomonas (151.0 ng/μL) in the DNMFC cathode was five-fold higher than that in the SCMFC, although the bacterial community compositions were quite similar. The DNMFC with highly abundant Pseudomonas exhibited much better performance in terms of electrochemical activity and nitrate removal. The evolution process of functional bacteria from the SCMFC to the DNMFC comprehensively reveals the significant role of denitrifying electroactive bacteria in a bioelectrochemical system for nitrogen-containing wastewater treatment.

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Strategies for ammonia recovery from wastewater: a review

Farghali,

Chen,

Osman

et al. 2024

Environ Chem Lett

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The circular economy requires advanced methods to recycle waste matter such as ammonia, which can be further used as a fuel and a precursor of numerous value-added chemicals. Here, we review methods for the recovery of ammonia from wastewater with emphasis on biological and physicochemical techniques, and their applications. Biological techniques involve nitrification, denitrification, and anammox processes and the use of membrane bioreactors. Physicochemical techniques comprise adsorption, membrane filtration, ion exchange, chemical precipitation, ammonia stripping, electrochemical oxidation, photocatalytic oxidation, bioelectrochemical systems, and membrane hybrid systems. We found that nitrification and anammox processes in membrane bioreactors stand out for their cost-effectiveness, reduced sludge production, and energy efficiency. The use of struvite precipitation is an efficient, environmentally friendly, and recyclable method for ammonia removal. Membrane hybrid systems are promising for ammonia recovery, nutrient concentration, and wastewater treatment, with applications in fertilizer production and water purification. Overall, nitrogen removal ranges from 28 to 100%, and nitrogen recovery ranges from 9 to 100%.

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Ammonia Removal by Simultaneous Nitrification and Denitrification in a Single Dual-Chamber Microbial Electrolysis Cell

Cited by 7 publications

References 51 publications

Development of a Simple Bioponic Method Using Manure and Offering Comparable Lettuce Yield than Hydroponics

Development of a Simple Bioponic Method Using Manure and Offering Comparable Lettuce Yield than Hydroponics

The Important Role of Denitrifying Exoelectrogens in Single-Chamber Microbial Fuel Cells after Nitrate Exposure

Strategies for ammonia recovery from wastewater: a review

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