Electric Power Consumption and Current Efficiency of Electrochemical and Electrobiological Rotating Disk Contactors Removing Nutrients from Wastewater Generated in Soil-Less Plant Cultivation Systems

Rodziewicz, Joanna; Mielcarek, Artur; Janczukowicz, Wojciech; Bryszewski, Kamil

doi:10.3390/w12010213

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…The benefits of using electrocoagulation method are low costs [43], little energy [44] and the possibility of eliminating a wide range of pollutants [45]. Biological treatment, fenton oxidation, membrane separation and physiochemical treatment have some major disadvantages, such as their high operational costs, higher sludge formation, long retention time and production of toxic byproducts [46][47][48]. The costs of fenton oxidation method is $1.46 m −3 .…”

Section: Resultsmentioning

confidence: 99%

Removal of Chromium (Cr) and Formaldehyde [CH<sub>2</sub>O (H−CHO)] from Leather Tannery Effluents Using Electrocoagulation Treatment Process

Elarbaoui¹

2023

Pol. J. Environ. Stud.

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Pollution with contaminants from effluents of industrial units constitutes a danger to health and environment. This is the case of chromium (Cr) and formaldehyde [CH 2 O (H−CHO)] contained in leather tannery effluents, identified and characterized by ICP-OES (Inductively coupled plasma -optical emission spectrometry) and HPLC (High Performance Liquid Chromatography). The levels recorded for these two contaminants in wastewater constitute an environmental risk of average degree. The treatment of this wastewater by electrocoagulation completely eliminates chromium and reduces organic pollution by 65%. We applied an electric current (I) of variable intensity (1 to 2.5 Ampere). The best results were obtained with the highest current intensity.

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Section: Resultsmentioning

confidence: 99%

Removal of Chromium (Cr) and Formaldehyde [CH<sub>2</sub>O (H−CHO)] from Leather Tannery Effluents Using Electrocoagulation Treatment Process

Elarbaoui¹

2023

Pol. J. Environ. Stud.

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“…To study the efficiency of the electrolyzer concerning the applied voltage, the electrical cell power (P) required for the reaction at the experimental electrodes is calculated using the equation [31] :…”

Section: Fig 2: Typical Aec Polarization Curve [30]mentioning

confidence: 99%

Nickel and titanium metals for the hydrogen evolution reaction in water electrolysis: A comparative study

Saad¹,

Lattieff²

2023

Tikrit J. Pure Sci.

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This work investigated experimentally and theoretically the I-V output change, the hydrogen production, and the efficiency of Ti and Ni metals as substrates for water electrolysis systems. To make optimization between the candidate electrodes, seven configurations of Ni-Ti, Ti-Ti, and Ti-Ni with three KOH solutions of 10, 20, and 30 % wt (weight KOH gm/weight water gm) as an electrolyte were conducted as a cathode-anode system. The selected electrodes were examined by scanning electron microscopy (SEM) and energy dispersive (EDX) to study their surface morphology and element composition. According to experimental findings, when the cell voltage of 5 V is applied, the hydrogen production from the Ti-Ti (20%KOH) and Ni-Ti (20% and 30% KOH) electrodes reach an optimal value of 6331 cm3, which is significantly higher than the hydrogen production from the other electrodes at the same voltage. The Ni-Ti electrode with a 10% KOH content had the maximum efficiency (72%), and the Ni-Ti electrode with a 30% KOH content had the lowest efficiency (61%), both at 3V for the cell. This study demonstrates that the Ni-Ti system can be the most suitable source for hydrogen evolution rather than the other arrangements when the appropriate mixing ratio of 20 % KOH solution is prepared before the electrolysis process

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“…Here, current efficiency and energy consumption are employed to represent the denitrification performance of electrochemical reactor in the optimum point [51,52]. To calculate the mentioned parameters, the equations presented in the published articles were applied [53].…”

Section: Current Density and Power Consumption At Optimummentioning

confidence: 99%

Electrochemical Denitrification of Synthetic Aqueous Solution and Actual Contaminated Well Water: RSM Modeling, Kinetic Study, Monte Carlo Optimization, and Sensitivity Analysis

Shamseali

Mohammadi

Pourzamani

et al. 2022

International Journal of Chemical Engineering

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The process of electrochemical denitrification is applied with the aim of converting nitrate ( NO 3 − ) to N2 gas by reducing nitrate and oxidizing by-products such as ammonia ( NH 4 + ). In this study, Ti/RuO2 and graphite were used as anode and cathode electrodes, respectively, to treat synthetic aqueous solutions containing different concentrations of nitrate ions. Nitrate initial concentration (2.75–55 mg NO3-N/lit), voltage (2.5–30 V), pH (3–13), electrode distance (ED = 0.5–3.5 cm), and reaction time (10–180 min) were the main studied operating parameters for the electrochemical denitrification (ECD) reactor. The experiments were designed using the central composite design (CCD) method. The experimental results were modeled with the response surface methodology (RSM) technique. Scanning electron microscope (SEM), X-ray diffraction analyzer (XRD), and Fourier transform infrared spectroscopy (FTIR) characterized electrodes were performed before and after all experiments. Optimization and sensitivity analysis was performed using the Monte Carlo simulation (MSC) approach. The energy consumption and current efficiency were calculated for the ECD reactor. Kinetic models of zero, first, and second order were evaluated, and the second-order model was selected as the best kinetic model. Also, the effect of adding monovalent, divalent salts, and organic compounds to the process was evaluated. Finally, three nitrate-contaminated water wells were selected near agricultural lands as real samples and investigated the performance of the ECD process on the samples. The performance of the ECD reactor for the real samples showed some decrease compared to the synthetic samples.

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Electric Power Consumption and Current Efficiency of Electrochemical and Electrobiological Rotating Disk Contactors Removing Nutrients from Wastewater Generated in Soil-Less Plant Cultivation Systems

Cited by 17 publications

References 18 publications

Removal of Chromium (Cr) and Formaldehyde [CH<sub>2</sub>O (H−CHO)] from Leather Tannery Effluents Using Electrocoagulation Treatment Process

Removal of Chromium (Cr) and Formaldehyde [CH<sub>2</sub>O (H−CHO)] from Leather Tannery Effluents Using Electrocoagulation Treatment Process

Nickel and titanium metals for the hydrogen evolution reaction in water electrolysis: A comparative study

Electrochemical Denitrification of Synthetic Aqueous Solution and Actual Contaminated Well Water: RSM Modeling, Kinetic Study, Monte Carlo Optimization, and Sensitivity Analysis

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