Electrocoagulation of food waste digestate and the suitability of recovered solids for application to agricultural land

Reilly, Matthew; Cooley, Andrew P.; Richardson, Brittany; Tito, Duarte Novaes; Theodorou, Michael K.

doi:10.1016/j.jwpe.2021.102121

Cited by 11 publications

(3 citation statements)

References 48 publications

(61 reference statements)

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“…In this study, the maximum ammonium removal of 98.80 % resulted from the EC treatment for 30 min, 20 volts, stainless steel electrodes and iron. Wastewater treatment using electrochemistry previously reported was able to convert NH4 + into NO3 and N2 gas through the oxidation process [41]. Based on the ANOVA test, the harvesting time of D. salina using EC had a significant effect on ammonium reduction; at the 0.05 level, the slope was significantly different from zero.…”

Section: The Equilibrium Of Ammonia and Ammoniummentioning

confidence: 87%

Equilibrium of Ammonia (NH3) and Ammonium (NH4+) during Microalgae Harvesting using Electrocoagulation

Purwono

Hadiyanto

Budihardjo

2023

IJE

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Harvesting microalgae is an important process in gaining biomass while the remaining water is still rich in nutrients. These nutrients, mainly nitrogen and phosphorous, could cause eutrophication of water bodies (rivers, lakes, and oceans) and ecosystem degradation if discharged directly without proper treatment. Electrocoagulation (EC) is one of the harvesting methods and has several advantages: ease of operation, fast harvesting, adaptability, environmental friendliness, and low footprint. However, EC method for harvesting microalgae has the potential in producing ammonia, which is undesirable due to its threat to the environment. The purpose of this study is to establish the equilibrium of ammonium (NH4 + ) and ammonia (NH3) during Dunaliella salina harvesting. The harvesting was conducted using EC with a variation of 20 volts, 30 min, and 400 rpm. The result shows that the harvesting efficiency can reach 93.72% after 5 min of processing, decreasing the concentration of inorganic nitrogen compounds in total ammonia nitrogen (TAN) to 98.80%.

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Section: The Equilibrium Of Ammonia and Ammoniummentioning

confidence: 87%

Equilibrium of Ammonia (NH3) and Ammonium (NH4+) during Microalgae Harvesting using Electrocoagulation

Purwono

Hadiyanto

Budihardjo

2023

IJE

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“…50 For solutions with high initial pollutants concentrations, could achieve better removal efficiencies by diluting solutions. 51 4 Mechanism of NOR removal in AL-EC reactor…”

Section: Effect Of Initial Concentrationmentioning

confidence: 99%

Efficient removal of norfloxacin from water using batch airlift-electrocoagulation reactor: optimization and mechanisms analysis

Feng

et al. 2023

RSC Adv.

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“…4 The predominant opinion among the scientific community regarding the mechanism of pollutant removal is one of anodic oxidation of the sacrificial anode forming the metal ions. 2,[5][6][7][8] These metal ions form the corresponding oxides and hydroxides in the solution, which adsorb the pollutants. Finally, the solids separate as sludge, thereby removing the pollutants, and the associated TOC, from the liquid matrix.…”

Section: Introductionmentioning

confidence: 99%

Apparent and true mineralization during combined electro‐oxidation and electro‐coagulation on stainless steel anode

Meena

Ghatak

2023

Asia-Pacific J Chem Eng

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Present study is a novel attempt to experimentally verify that electrochemical treatment of organic pollutants on stainless steel (SS) anode is a combination of electro‐oxidation (EO) and electro‐coagulation (EC) with quantitative estimation of individual contributions of the two mechanisms. Target organic pollutants, metformin HCl (MET‐HCl) and lamotrigine (LAM), were electrochemically treated with SS anode for this purpose. Experiments were designed using central composite rotatable design (CCRD) to assess the effect of current density (CD) and supporting electrolyte concentration (SEC) as independent process parameters. Under all conditions, the process was experimentally verified to be a combination of EO and EC. For MET‐HCl, true mineralization (TM) as a result of EO contribution varied between 50.13% and 66.64%. EO contribution and resulting TM for LAM ranged from 37.5% to 61.83%. EC contributed 30.6%–31.84% towards MET‐HCl remediation causing the TOC to be transferred from the liquid to the sludge produced (SP). EC contribution was 23.68%–35.89% for LAM remediation. Thus, apparent mineralization (AM), the sum of EO and EC contributions, ranged from 80.63% to 97.79% for MET‐HCl and 61.18% to 96.82% for LAM.Process parameters were statistically optimized using response surface methodology (RSM) to simultaneously maximize TM and AM with minimal energy consumption and maximal current efficiency. The optimized conditions were 0.83 mA/cm2 CD and 86.66 ppm SEC for MET‐HCl. The corresponding values were 1.31 mA/cm2 CD and 79.51 ppm SEC for LAM.

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Electrocoagulation of food waste digestate and the suitability of recovered solids for application to agricultural land

Cited by 11 publications

References 48 publications

Equilibrium of Ammonia (NH3) and Ammonium (NH4+) during Microalgae Harvesting using Electrocoagulation

Equilibrium of Ammonia (NH3) and Ammonium (NH4+) during Microalgae Harvesting using Electrocoagulation

Efficient removal of norfloxacin from water using batch airlift-electrocoagulation reactor: optimization and mechanisms analysis

Apparent and true mineralization during combined electro‐oxidation and electro‐coagulation on stainless steel anode

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