Elemental Migration and Transformation from Sewage Sludge to Residual Products during the Pyrolysis Process

Praspaliauskas, Marius; Pedišius, Nerijus; Striūgas, Nerijus

doi:10.1021/acs.energyfuels.8b00196

Cited by 40 publications

(15 citation statements)

References 46 publications

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“…The pyrolysis of SS altered its mineralogy as a result of the thermal transformations [39]. The identification of the minerals in SS and SS-BC match those described by [40].…”

Section: Discussionsupporting

confidence: 59%

The Sewage Sludge Biochar and Its Composts Influence the Phosphate Sorption in an Alkaline–Calcareous Soil

et al. 2021

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This study evaluates the potential of sewage sludge, farm manure, rock phosphate, and their composts or biochar as useful materials for phosphorous (P) recovery. An alkaline–calcareous soil was incubated with different compost-based amendments to discern their impact on the P sorption characteristics. The treatments examined consisted of sewage sludge (SS), SS biochar (SS-BC), or composts of SS with rock phosphate (RP) and farm manure (FM) in different ratios, i.e., (i) control, (ii) SS, (iii) SS-BC, (iv) SS50:FM50, (v) SS75:FM25, (vi) SS25:FM25:RP50, (vii) SS50:FM25:RP25, (viii) SS75:FM0:RP25, and (ix) SS50:FM0:RP50. Prior to incubation for 45 days, the composts and biochar treatments combinations were characterized for elemental composition using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) spectroscopy. The treated soils were analyzed for soil pH, electrical conductivity (EC), Olsen’s P, and P adsorption isotherms, at day 5 and 45 of the incubation. Langmuir and Freundlich’s equations were used to calculate P adsorption. Results showed that there was no significant influence on soil pH for any treatment throughout the experiment. However, soil EC decreased significantly for all treatments after 5 days of incubation; however, this effect was diminished after 45 days of incubation. All the treatments significantly decreased P sorption capacity both at the start (day 5) and end of the incubation (day 45) period compared to control. The treatment combination SS25:FM25:RP50 recovered the highest Olsen-P (79.41 mg kg−1). The other treatment combinations including SS and FM also recovered a greater Olsen’s P compared to the control. However, the sole application of only SS showed lower P recovery than the control soil, which further decreased with increase in incubation time. These findings improve our understanding that the stable pool of bioavailable P within an alkaline calcareous soil can be mobilized by using different organic treatment combinations instead of only SS. However, further in situ investigations may help to valorize the potential of sewage sludge, farm manure, rock phosphate, and their composts or biochar to improve P recovery in alkaline–calcareous.

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“…The pyrolysis of SS altered its mineralogy as a result of the thermal transformations [39]. The identification of the minerals in SS and SS-BC match those described by [40].…”

Section: Discussionsupporting

confidence: 59%

The Sewage Sludge Biochar and Its Composts Influence the Phosphate Sorption in an Alkaline–Calcareous Soil

et al. 2021

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“…Sewage sludge oncentrations were prepared in soil mixtures containing soil, perlite and sand (5: 3: 2). Detailed characteristics of origin sewage sludge could be found in Praspaliauskas et al (2018). Ten washed and weighed adult earthworms were added to each container with 500 g prepared soil mixture.…”

Section: Methodsmentioning

confidence: 99%

Bioremediation Efficiency of Heavy Metal Contaminated Soil Using Earthworm Eisenia Fetida

Kniuipytė

Praspaliauskas

Žaltauskaitė

et al. 2020

International Conference “Environmental Engineering”

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The amount of sewage sludge (SS) used in agriculture and forest plantations is constantly growing in EU. It’s known that even after various treatment methods some of contaminants still remain. The main risks of using SS in agriculture or forestry are related with hevy metals and organic pollutants content in SS. Heavy metals tend to acumu-late in the environment and living organisms and may cause different adverse effects. Bioremediation using earthworms can be used to eliminate or mitigate the threat of heavy metals. Bioremediation is cheaper, requiries less energy and is more environmentally friendly than conventional physical or chemical remediation methods. But it’s really important to evaluate bioremediation efficiency for SS, because there is evidence that nutrients in SS might improve efficiency of bioremediation. In this study earthworms Eisenia fetida were exposed for 9 weeks to SS amended soil. Earthworm mortality, growth and heavy metals (Al, Fe) accumulation were evaluated. The results showed that SS had a highly significant effect on earthworm mortality (F=4.98; p;lt0.05) and growth (F=3.88–67.02; p;lt0.05). Both metals concentrations in soil were signifficant (p;lt0.05) lower after vermi-remediation than after SS soil amendments. SS concentration had a significant effect to Al concentration accumulated in earthworm tissue (F=33.71; p;lt0.05). This study demonstrated that bioremediation efficiency using E. fetida depends on concentrations of SS, survival and growth of earthworms.

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“…Therefore, a proximate and ultimate analysis, as well as a gas chromatography method were used to characterise the waste cooking oil. The proximate (volatile matter, fixed carbon, ash, moisture and lower heating value) and the ultimate (content of C, H, N, S, O, Cl) analyses were performed by a fuel elements analyser Flash 2000 (ThermoFisher Scientific, the Netherlands), a fuel calorimeter IKA C5000 (IKA, Germany) and a thermogravimeter TGA 4000 coupled with a gas chromatograph Clarus 680 and a mass spectrometer Clarus 600 T (Perkin Elmer, USA) according to standards LST EN ISO 16948:2015, LST EN ISO 16994:2016 [22]. A gas chromatograph Clarus 500 (Perkin Elmer, USA) was used to measure the composition of the fatty acids in the WCO according to the methodology provided in the standard LST EN ISO5508 [23].…”

Section: Waste Cooking Oil and Its Characterization Methodsmentioning

confidence: 99%

Gasification of Waste Cooking Oil to Syngas by Thermal Arc Plasma

et al. 2019

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The depletion and usage of fossil fuels causes environmental issues and alternative fuels and technologies are urgently required. Therefore, thermal arc water vapor plasma for a fast and robust waste/biomass treatment is an alternative to the syngas method. Waste cooking oil (WCO) can be used as an alternative potential feedstock for syngas production. The goal of this experimental study was to conduct experiments gasifying waste cooking oil to syngas. The WCO was characterized in order to examine its properties and composition in the conversion process. The WCO gasification system was quantified in terms of the produced gas concentration, the H2/CO ratio, the lower heating value (LHV), the carbon conversion efficiency (CCE), the energy conversion efficiency (ECE), the specific energy requirements (SER), and the tar content in the syngas. The best gasification process efficiency was obtained at the gasifying agent-to-feedstock (S/WCO) ratio of 2.33. At this ratio, the highest concentration of hydrogen and carbon monoxide, the H2/CO ratio, the LHV, the CCE, the ECE, the SER, and the tar content were 47.9%, 22.42%, 2.14, 12.7 MJ/Nm3, 41.3% 85.42%, 196.2 kJ/mol (or 1.8 kWh/kg), and 0.18 g/Nm3, respectively. As a general conclusion, it can be stated that the thermal arc-plasma method used in this study can be effectively used for waste cooking oil gasification to high quality syngas with a rather low content of tars.

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Elemental Migration and Transformation from Sewage Sludge to Residual Products during the Pyrolysis Process

Cited by 40 publications

References 46 publications

The Sewage Sludge Biochar and Its Composts Influence the Phosphate Sorption in an Alkaline–Calcareous Soil

The Sewage Sludge Biochar and Its Composts Influence the Phosphate Sorption in an Alkaline–Calcareous Soil

Bioremediation Efficiency of Heavy Metal Contaminated Soil Using Earthworm Eisenia Fetida

Gasification of Waste Cooking Oil to Syngas by Thermal Arc Plasma

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