The Energy Efficiency of Domestic Wastewater Treatment Processes: Case Analysis

Bartha, Csaba; Jipa, Monica; Ignat, D.; Tokos, Attila; Lıngvay, Iosif

doi:10.46904/eea.20.68.4.1108004

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…In this regard, we opted for the wastewater treatment plant from Romuli locality (BN) Romania presented in [29].…”

Section: Experimental Equipment Design and Developmentmentioning

confidence: 99%

“…With this background, the polarization electrodes and a suitable power supply were designed and developed for the existing bioreactors in the wastewater treatment plant [29].…”

Section: Experimental Equipment Design and Developmentmentioning

confidence: 99%

“…Sewage treatment involves coarse filtration, homogenization / neutralization / pH correction, coarse sedimentation, biological treatment, sludge sedimentation, filtration, and disinfection before discharge into surface waters [29].…”

Section: Introductionmentioning

confidence: 99%

“…Usually, for industrial and domestic wastewater treatment, at least one microbiological treatment stage is applied [29]- [34]. The microbiological stages of purification involve the inoculation of wastewater with bacteria, moulds, and microalgae [35]- [37], and ensuring aerobic (oxygenation by air bubbling) and anaerobic conditions for the development of microorganisms, which through their specific metabolism, consume pollutants from treated wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Due to their specificity, biochemical processes of pollutant metabolism are slow processes, involving longterm treatments with high electricity consumption, necessary for air bubbling, homogenization, recirculation by pumping, consumptions that contribute to approximately 60% [29,33] of the total specific electricity consumption of the treatment plant. The length of microbiological treatment can be decreased by the use of bio-activators [39].…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic Stimulation of Microbial Activity in Wastewater Treatment: Experimental Equipment

Tokos¹,

Jipa²,

Marinescu³

et al. 2021

EEA

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A system for electromagnetic stimulation of microorganisms' activity from the active sludge of wastewater treatment plants was developed and preliminarily tested. Through electrochemical, gravimetric, XRD, and SEM-EDAX measurements, it was found that austenitic stainless steel 18/8 presents good stability to AC polarization in wastewater. Preliminary determinations performed through the dielectric spectroscopy technique indicated that the activated sludge's microbial flora is sensitive to 50 ± 0.1 Hz. The stimulation system developed and put into service on the biological aerobic treatment bioreactor consists of a pair of polarizing electrodes, made of perforated 18/8 stainless steel sheet, electrically connected to a power supply, which at 50 Hz is capable of debiting adjustable voltages between 5 and 24 Vrms at a maximum current of 5 A. Preliminary in situ measurements showed that following the stimulation of the microorganisms from the sludge suspension, as a result of an applied electromagnetic field of approximately 4.5 V/m at 50 Hz, the metabolism of residues is accelerated substantially (organic residues determined by oxygen demand decrease by about 42 %, nitrogen/ammonium content by about 44% and total phosphorus by about 50 % which results in an increase in free oxygen concentration by about 71 %).

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“…In this regard, we opted for the wastewater treatment plant from Romuli locality (BN) Romania presented in [29].…”

Section: Experimental Equipment Design and Developmentmentioning

confidence: 99%

“…With this background, the polarization electrodes and a suitable power supply were designed and developed for the existing bioreactors in the wastewater treatment plant [29].…”

Section: Experimental Equipment Design and Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%