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Paladino, Gabriela
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Publications (5 of 5) Show all publications
Arrigoni, J. P., Paladino, G., Garibaldi, L. ., Hedenström, E., Zhang, W. & Laos, F. (2024). Performance of small-scale composting in low ambient temperatures: Effects of adding animal by-products and recycling leachates. Waste Management Bulletin, 2(3), 309-317
Open this publication in new window or tab >>Performance of small-scale composting in low ambient temperatures: Effects of adding animal by-products and recycling leachates
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2024 (English)In: Waste Management Bulletin, E-ISSN 2949-7507, Vol. 2, no 3, p. 309-317Article in journal (Refereed) Published
Abstract [en]

Decentralized composting is an emerging method for managing biowaste, engaging waste generators as active recyclers in the waste management cycle. Evaluating performance and identifying optimization opportunities within this composting framework is essential to maximize its benefits and address its challenges. In small-scale composters, fresh waste is continuously mixed with previously added materials, shifting the typical composting process. As with larger systems, the composition of the feedstock influences the temperature profile and the quality of the final product. The issue of whether to include animal-source waste remains controversial in the development of standards and program guidelines. On the other hand, evaluating a leachate recycling method could help prevent nutrient loss and mitigate environmental impacts when bulking agents are lacking. In this study, kitchen and garden wastes were composted in 500-L static composters under cold climate conditions. We examined obtained compost stability, maturity, and quality parameters to determine the effects of adding animal by-product waste and/or recycling leachate. Our findings indicate that including animal by-products allows reaching sanitation temperatures under cold weather conditions and that recycling leachates could reduce nutrient losses and alleviate environmental and other user concerns while improving temperature, stability, maturity, and product quality patterns in decentralized composting. 

Place, publisher, year, edition, pages
Elsevier BV, 2024
Keywords
Biowaste prevention, Circular economy, Community composting, Composting performance, Home composting
National Category
Other Environmental Engineering
Identifiers
urn:nbn:se:miun:diva-53172 (URN)10.1016/j.wmb.2024.09.003 (DOI)2-s2.0-85209553543 (Scopus ID)
Available from: 2024-11-26 Created: 2024-11-26 Last updated: 2025-01-07
Hacıoğlu, B., Dupaul, G., Paladino, G., Edman, M. & Hedenström, E. (2024). Unlocking the biodegradative potential of native white-rot fungi: a comparative study of fiberbank organic pollutant mycoremediation. Bioengineered, 15(1), Article ID 2396642.
Open this publication in new window or tab >>Unlocking the biodegradative potential of native white-rot fungi: a comparative study of fiberbank organic pollutant mycoremediation
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2024 (English)In: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 15, no 1, article id 2396642Article in journal (Refereed) Published
Abstract [en]

Fiberbanks refer to a type of fibrous sediment originated by the forestry and wood pulping industry in Sweden. These anthropogenic sediments are significantly contaminated with potentially toxic elements, and a diverse array of organic pollutants. Additionally, these sediments are of environmental concern due to their potential role in greenhouse gas emissions. Given the environmental risks posed by these sediments, the development of effective remediation strategies is of critical importance. However, no specialized methods have been established yet for the cleanup of this specific type of contaminated sediments. To identify effective fungal species for the mycoremediation of the fiberbank substrate, we performed a detailed screening experiment. In this research, we primarily aimed at assessing both the growth capacity and the proficiency in degrading organic pollutants of 26 native white-rot fungi (WRF) species. These species were sourced from natural forest environments in northern Sweden. The experimental setup involved evaluating the WRF on plates containing fiberbank material with a central Hagem-agar disc to closely monitor the interaction of these species with fiberbank substrates. Among the fungi tested, Laetiporus sulphureus exhibited the highest growth area percentage at 72%, followed by Hymenochaete tabacina at 68% and Diplomitoporus crustulinus at 67%. For the removal of 2–3 ring polycyclic aromatic hydrocarbons (PAHs), Phellinus punctatus led with 68%, with Cystostereum muraii at 57% and Diplomitoporus crustulinus at 49%. Regarding the removal percentage of 4–6 ring PAHs, Diplomitoporus crustulinus showed the highest efficiency at 44%, followed by Phlebia tremellosa at 40% and Phlebiopsis gigantea at 28%. 

Place, publisher, year, edition, pages
Informa UK Limited, 2024
Keywords
Bioremediation, diplomitoporus crustulinus, fiberbank, mycoremediation, organic pollutants, phlebia tremellosa, phlebiopsis gigantea, white-rot fungi
National Category
Environmental Sciences
Identifiers
urn:nbn:se:miun:diva-52414 (URN)10.1080/21655979.2024.2396642 (DOI)39219315 (PubMedID)2-s2.0-85202963013 (Scopus ID)
Available from: 2024-09-16 Created: 2024-09-16 Last updated: 2024-09-16
Morero, B., Paladino, G. L., Montagna, A. F. & Cafaro, D. C. (2023). Integrated Waste Management: Adding Value to Oil and Gas Industry Residues Through Co-processing. Waste and Biomass Valorization, 14(4), 1391-1412
Open this publication in new window or tab >>Integrated Waste Management: Adding Value to Oil and Gas Industry Residues Through Co-processing
2023 (English)In: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265X, Vol. 14, no 4, p. 1391-1412Article in journal (Refereed) Published
Abstract [en]

In developing countries, the sustainable management of materials into a circular economy framework is conditioned by several constraints, being economic limitations one of the most relevant. Integrated waste management could effectively aid in overcoming them. This work presents an exhaustive analysis from both economic and environmental points of view addressing the selection and design of treatment alternatives for the integrated management of urban and industrial wastes. We propose a mixed-integer mathematical programming formulation to determine the optimal set of treatments to convert wastes into energy, marketable products or innocuous materials, and we endorse the environmental performance through a life cycle analysis. In our case study, urban wastes include sewage sludge and municipal solid waste, while industrial wastes come from two sources: drill cuttings (an important oil and gas industry residue) and seasonal pomace waste from fruit processing. Treatment alternatives comprise anaerobic digestion, composting, recycling, bioremediation, compost amendment, thermal desorption and final disposal in landfill. Results for different scenarios show that even though the most profitable alternative is to dispose drill cuttings in landfills while processing organic wastes by anaerobic digestion, integrated management using biological treatment alternatives provides a more sustainable and still profitable strategy. We also demonstrate that the process integration increases the profitability and reduces the environmental impact significantly when compared with separate treatment alternatives for waste streams. Graphical abstract: [Figure not available: see fulltext.] 

Keywords
Coprocessing, Fruit pomace, Life cycle analysis, Oil and gas residues, Optimization, Urban waste
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:miun:diva-46105 (URN)10.1007/s12649-022-01908-5 (DOI)000852464900003 ()2-s2.0-85137474379 (Scopus ID)
Available from: 2022-09-20 Created: 2022-09-20 Last updated: 2023-03-27Bibliographically approved
Jiang, B., Zhang, D., Hu, X., Söderlind, U., Paladino, G., Gamage, S., . . . Yu, C. (2023). Low-Grade Syngas Biomethanation in Continuous Reactors with Respect to Gas–Liquid Mass Transfer and Reactor Start-Up Strategy. Fermentation, 9(1), Article ID 38.
Open this publication in new window or tab >>Low-Grade Syngas Biomethanation in Continuous Reactors with Respect to Gas–Liquid Mass Transfer and Reactor Start-Up Strategy
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2023 (English)In: Fermentation, ISSN 2311-5637, Vol. 9, no 1, article id 38Article in journal (Refereed) Published
Abstract [en]

In order to utilize a wider range of low-grade syngas, the syngas biomethanation was studied in this work with respect to the gas–liquid mass transfer and the reactor start-up strategy. Two reactors, a continuous stirred tank (CSTR) and a bubble column with gas recirculation (BCR-C), were used in the experiment by feeding an artificial syngas of 20% H2, 50% CO, and 30% CO2 into the reactors at 55 °C. The results showed that the CH4 productivity was slightly increased by reducing the gas retention time (GRT), but was significantly improved by increasing the stirring speed in the CSTR and the gas circulation rate in the BCR-C. The best syngas biomethanation performance of the CSTR with a CH4 productivity of 22.20 mmol·Lr−1·day−1 and a yield of 49.01% was achieved at a GRT of 0.833 h and a stirring speed of 300 rpm, while for the BCR-C, the best performance with a CH4 productivity of 61.96 mmol·Lr−1·day−1 and a yield of 87.57% was achieved at a GRT of 0.625 h and a gas circulation rate of 40 L·Lr−1·h−1. The gas–liquid mass transfer capability provided by gas circulation is far superior to mechanical stirring, leading to a much better performance of low-grade syngas biomethanation in the BCR-C. Feeding H2/CO2 during the startup stage of the reactor can effectively stimulate the growth and metabolism of microorganisms, and create a better metabolic environment for subsequent low-grade syngas biomethanation. In addition, during the thermophilic biomethanation of syngas, Methanothermobacter is the dominant genus. 

Keywords
bubble column reactor, continuous stirred tank reactor, low-grade syngas, start-up strategy, syngas fermentation
National Category
Energy Engineering
Identifiers
urn:nbn:se:miun:diva-47520 (URN)10.3390/fermentation9010038 (DOI)000915136300001 ()2-s2.0-85146808770 (Scopus ID)
Available from: 2023-02-07 Created: 2023-02-07 Last updated: 2023-03-03Bibliographically approved
Haller, H., Paladino, G., Dupaul, G., Gamage, S., Hadzhaoglu, B., Norström, S., . . . Jonsson, A. (2023). Polluted lignocellulose-bearing sediments as a resource for marketable goods—a review of potential technologies for biochemical and thermochemical processing and remediation. Clean Technologies and Environmental Policy, 25, 409-425
Open this publication in new window or tab >>Polluted lignocellulose-bearing sediments as a resource for marketable goods—a review of potential technologies for biochemical and thermochemical processing and remediation
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2023 (English)In: Clean Technologies and Environmental Policy, ISSN 1618-954X, E-ISSN 1618-9558, Vol. 25, p. 409-425Article in journal (Refereed) Published
Abstract [en]

Lignocellulose-bearing sediments are legacies of the previously unregulated wastewater discharge from the pulp and paper industry, causing large quantities of toxic organic waste on the Baltic Sea floor and on the bottom of rivers and lakes. Several km2 are covered with deposits of lignocellulosic residues, typically heavily contaminated with complex mixtures of organic and inorganic pollutants, posing a serious threat to human and ecological health. The high toxicity and the large volume of the polluted material are challenges for remediation endeavours. The lignocellulosic material is also a considerable bioresource with a high energy density, and due to its quantity, it could appeal to commercialization as feedstock for various marketable goods. This study sets out to explore the potential of using this polluted material as a resource for industrial production at the same time as it is detoxified. Information about modern production methods for lignocellulosic material that can be adapted to a polluted feedstock is reviewed. Biochemical methods such as composting, anaerobic digestion, as well as, thermochemical methods, for instance, HTC, HTL, pyrolysis, gasification and torrefaction have been assessed. Potential products from lignocellulose-bearing sediment material include biochar, liquid and gaseous biofuels, growing substrate. The use of a contaminated feedstock may make the process more expensive, but the suggested methods should be seen as an alternative to remediation methods that only involve costs. Several experiments were highlighted that support the conception that combined remediation and generation of marketable goods may be an appropriate way to address polluted lignocellulose-bearing sediments. Graphic abstract: [Figure not available: see fulltext.] 

Keywords
Circular Economy, Cleaner Production, Ecotechnology, Lignocellulose-bearing sediments, Sediment Mining
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:miun:diva-42751 (URN)10.1007/s10098-021-02147-3 (DOI)000669151800001 ()2-s2.0-85109309486 (Scopus ID)
Available from: 2021-08-10 Created: 2021-08-10 Last updated: 2023-02-21
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