Treatment of Landfill Leachate Using Ultrasound Assisted SBR Reactor

Grosser, Anna; Neczaj, Ewa; Madeła, Magdalena; Celary, Piotr

doi:10.3390/proceedings2110648

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Co-treatment of landfill leachate with readily biodegradable wastewater (for example, municipal wastewater) seems a promising approach, thanks to low operating cost and easy maintenance. So far, this solution has been successfully used for the treatment of young and intermediate leachates (mostly at a volumetric ratio of up to 10%) [5,13,14]. However, this approach poses a risk of disrupting the operation of biological reactors and is the main argument against the application of this solution.…”

Section: Type Of Leachate Youngmentioning

confidence: 99%

Ultrasound-Assisted Treatment of Landfill Leachate in a Sequencing Batch Reactor

Grosser

Neczaj

Madeła

et al. 2019

Water

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Purification of leachates is currently a big challenge due to their high variability in composition and amount. The complexity of the medium, namely leachates, makes new solutions highly sought after and finds the existing ones in need of optimization. The effects of ultrasound pretreatment (20 kHz, 12 µm) on biological treatment of landfill leachates in the form of processes carried out in two sequencing batch reactors were investigated. The experiment was divided into two stages. In the first stage, leachate was treated by an ultrasonic field at different sonication times (0.5, 1, 3, 5, 10 and 15 min). Next, leachates with and without conditioning were combined with municipal wastewater in the following ratios: 5, 10, 15 and 25% v/v. For optimal processing time (3 min), 16% removal of COD was achieved. In turn, the BOD5/COD ratio was 0.3, which is higher by approximately 270% than that of the non-conditioned sample. Further elongation of sonication time did not significantly affect both parameters. Also, pretreatment of leachate resulted in a maximum increase noted in the study of specific oxygen uptake rate and dehydrogenase activity of approximately 21 and 2 times compared to the non-conditioned sample. The implementation of a pretreatment step prior to the biological treatment was shown to result in higher pollutant removal efficiency. Depending on the share of leachates in the mixture, the removal enhancements of BOD, COD, and ammonium nitrogen for conditioned samples ranged from 6–48.5%, 4–48% and 11–42%, respectively. Furthermore, pretreatment of leachate allows for an increased (by up to 20%) share of leachate volume in the influent stream entering the reactor, while maintaining the quality of effluents in accordance with national regulation requirements. However, in scenarios without pretreatment, the leachate ratio cannot exceed 5% of the total wastewater due to poor quality of the effluents. The operational cost of ultrasound pretreatment of leachate was 22.58 €/(m3·g removed COD).

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Section: Type Of Leachate Youngmentioning

confidence: 99%

Ultrasound-Assisted Treatment of Landfill Leachate in a Sequencing Batch Reactor

Grosser

Neczaj

Madeła

et al. 2019

Water

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“…The application of biological methods in the cotreatment of landfill leachate and domestic wastewater in urban sewage plants has become popular over the last decade [2][3][4][5]. However, there is scarce information on the impact of this combined treatment on the operation of the wastewater treatment process and, in particular, on the physiological and functional state of the activated sludge microorganisms.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this study was to assess the impact of the KPL that are discharged into the wastewater treatment plant (WWTP) "Klimzowiec" along with the municipal effluents on the activated sludge microorganisms and the laboratory-scale SBR operation. Within the context of the combined treatment of the KPL and synthetic wastewater in activated sludge, the specific goals of this research were to (1) characterize and determine the acute toxicity of the KPL to the activated sludge microorganisms, (2) evaluate the changes in the operational parameters of the SBRs, (3) analyze the functional capacity and structural diversity of the microorganisms, (4) assess the structure of the activated sludge flocs, and (5) establish the relationships between the biological and physicochemical factors being studied. The special attention will be focused on the use of marker fatty acids to assess alterations in the structure of microbial communities under the KPL exposure because such studies have not been performed yet.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Biological Cotreatment of the Kalina Pond Leachate on Laboratory Sequencing Batch Reactor Operation and Activated Sludge Quality

Michalska

Greń

Żur

et al. 2019

Water

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Hauling landfill leachate to offsite urban wastewater treatment plants is a way to achieve pollutant removal. However, the implementation of biological methods for the treatment of landfill leachate can be extremely challenging. This study aims to investigate the effect of blending wastewater with 3.5% and 5.5% of the industrial leachate from the Kalina pond (KPL) on the performance of sequencing batch reactor (SBR) and capacity of activated sludge microorganisms. The results showed that the removal efficiency of the chemical oxygen demand declined in the contaminated SBR from 100% to 69% and, subsequently, to 41% after the cotreatment with 3.5% and 5.5% of the pollutant. In parallel, the activities of the dehydrogenases and nonspecific esterases declined by 58% and 39%, and 79% and 81% after 32 days of the exposure of the SBR to 3.5% and 5.5% of the leachate, respectively. Furthermore, the presence of the KPL in the sewage affected the sludge microorganisms through a reduction in their functional capacity as well as a decrease in the percentages of the marker fatty acids for different microbial groups. A multifactorial analysis of the parameters relevant for the wastewater treatment process confirmed unambiguously the negative impact of the leachate on the operation, activity, and structure of the activated sludge.

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Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment

Wilk

Szopińska

Sobaszek

et al. 2022

Environ Sci Pollut Res

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Treatment of Landfill Leachate Using Ultrasound Assisted SBR Reactor

Cited by 3 publications

References 18 publications

Ultrasound-Assisted Treatment of Landfill Leachate in a Sequencing Batch Reactor

Ultrasound-Assisted Treatment of Landfill Leachate in a Sequencing Batch Reactor

Impact of the Biological Cotreatment of the Kalina Pond Leachate on Laboratory Sequencing Batch Reactor Operation and Activated Sludge Quality

Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment

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