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Wang, Zhao
Publications (10 of 18) Show all publications
Rueda-Avellaneda, J. F., Gomez-Gonzalez, R., Rivas-García, P., Benitez-Bravo, R., Botello-Álvarez, J. E. & Wang, Z. (2023). Application of a sustainable location index approach to landfill site selection in Monterrey, Mexico. Waste Management & Research, 41(5), 1014-1025
Open this publication in new window or tab >>Application of a sustainable location index approach to landfill site selection in Monterrey, Mexico
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2023 (English)In: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 41, no 5, p. 1014-1025Article in journal (Refereed) Published
Abstract [en]

Landfilling is the main method to manage municipal solid waste (MSW) in Latin America due to the economic, technological and political characteristics of the region. The disposal of MSW in landfill sites may affect the quality of the environment and compromise a considerable share of the municipal budgets. The selection of suitable sites reduces the environmental and economic impact of landfills. In the present study the sustainable location index (SLI) is proposed as a methodology to assess environmentally, and economically, sanitary landfill site selection in the Metropolitan Area of Monterrey, a representative large-size city of Latin America. EVIAVE methodology was modified to include administrative and economic dimensions, which are assessed as a sustainable approach using together the SLI integrated with geospatial and multicriteria analysis tools. The assessment showed that the zones with the lowest SLI changes drastically when the importance of the economic or environmental factor varies. This result suggest that the inclusion of sustainability in landfill site selection decision-making is complex and it may requires the inclusion of local particularities such as municipal budgets, policies of MSW management and public perception about environmental deterioration.

Place, publisher, year, edition, pages
SAGE, 2023
Keywords
EVIAVE; geographic information system; landfill site selection; landfilling; multicriteria decision; Municipal solid waste; sustainability
National Category
Environmental Sciences
Identifiers
urn:nbn:se:hig:diva-40595 (URN)10.1177/0734242x221138733 (DOI)000894070400001 ()36472328 (PubMedID)2-s2.0-85144184652 (Scopus ID)
Available from: 2022-12-09 Created: 2022-12-09 Last updated: 2023-05-11Bibliographically approved
Arfan, M., Eriksson, O., Wang, Z. & Soam, S. (2023). Life cycle assessment and life cycle costing of hydrogen production from biowaste and biomass in Sweden. Energy Conversion and Management, 291, Article ID 117262.
Open this publication in new window or tab >>Life cycle assessment and life cycle costing of hydrogen production from biowaste and biomass in Sweden
2023 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 291, article id 117262Article in journal (Refereed) Published
Abstract [en]

In this study, an environmental and economic assessment of hydrogen production from biowaste and biomass is performed from a life cycle perspective, with a high degree of primary life cycle inventory data on materials, energy, and investment flows. Using SimaPro LCA software and CML-IA, 2001 impact assessment method, ten environmental impact categories are analyzed for environmental analysis. Economic analysis includes capital and operational expenditures and monetization cost of life cycle environmental impacts. The hydrogen production from biowaste has a high climate impact, photochemical oxidant, and freshwater eutrophication than biomass while it performs far better in ozone depletion, terrestrial ecotoxicity, abiotic depletion-fossil, abiotic depletion, human toxicity, and freshwater ecotoxicity. The sensitivity analysis of LCA results indicates that feedstock to biogas/pyrolysis-oil yields ratio and the type of energy source for the reforming process can significantly influence the results, particularly climate change, abiotic depletion, and human toxicity. The life cycle cost (LCC) of 1 kg hydrogen production has been accounted as 0.45–2.76 € with biowaste and 0.54–3.31 € with biomass over the plant's lifetime of 20 years. From the environmental impacts of climate change, photochemical oxidant, and freshwater eutrophication hydrogen production from biomass is a better option than biowaste while from other included impact categories and LCC perspectives it’s biowaste. This research contributes to bioresources to hydrogen literature with some new findings that can be generalized in Europe and even globally as it is in line with and endorse existing theoretical and simulation software-based studies.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Hydrogen, Biowaste, Biomass, Life cycle assessment, Life cycle cost, Fast pyrolysis, Anaerobic digestion
National Category
Energy Systems
Identifiers
urn:nbn:se:hig:diva-42521 (URN)10.1016/j.enconman.2023.117262 (DOI)001024612500001 ()2-s2.0-85162099378 (Scopus ID)
Available from: 2023-06-27 Created: 2023-06-27 Last updated: 2023-07-27Bibliographically approved
Carlos-Pinedo, S. & Wang, Z. (2022). Assessment of a full-scale solid-state anaerobic co-digestion: A multi-component substrate analysis by using ORWARE. Waste Management, 146, 36-43
Open this publication in new window or tab >>Assessment of a full-scale solid-state anaerobic co-digestion: A multi-component substrate analysis by using ORWARE
2022 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 146, p. 36-43Article in journal (Refereed) Published
Abstract [en]

Long-term sustainable biogas production requires different raw material alternatives, especially when reducing the most desirable organic substrate, food waste, which has been set as a goal in the 2030 Agenda. In Sweden, horse manure (HM) is generated in large quantities, and due to its physical and chemical characteristics, it has the potential to be used as a raw material to produce biogas through anaerobic digestion (AD). In order to investigate the challenges that HM digestion can impose in terms of methane yield and/or digestate quality, the modified ORganic WAste REsearch (ORWARE) AD model was applied. The aim was to study the effects of different substrates and combinations of these on the AD process during a full-scale solid-state (SS)-AD. In this sense, the model allows for the analysis of the digestion process of multicomponent substrates at the element level. The simulation results suggested that the replacement of green waste (GW) by HM with wood chips as bedding material gave the best improvement in terms of energy turnover; the liquid fraction of the digestate of this mixture of substrates presented the highest concentration in all the nutrients analyzed, specifically in total carbon-biological and phosphorus. The nutrient concentrations in the digestate from the aforementioned scenario are in line with the SPCR120 certification.

Place, publisher, year, edition, pages
Elsevier, 2022
Keywords
Solid-state co-digestion, Digestate, Full-scale, Horse manure, Modelling
National Category
Environmental Sciences
Identifiers
urn:nbn:se:hig:diva-38545 (URN)10.1016/j.wasman.2022.04.042 (DOI)000804701700002 ()35561541 (PubMedID)2-s2.0-85129712012 (Scopus ID)
Note

Funding agency: Gästrike Återvinnare Utveckling AB

Available from: 2022-05-20 Created: 2022-05-20 Last updated: 2023-12-15Bibliographically approved
Arfan, M., Wang, Z., Soam, S. & Eriksson, O. (2021). Biogas as a transport fuel—a system analysis of value chain development in a Swedish context. Sustainability, 13(8), Article ID 4560.
Open this publication in new window or tab >>Biogas as a transport fuel—a system analysis of value chain development in a Swedish context
2021 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 13, no 8, article id 4560Article in journal (Refereed) Published
Abstract [en]

Biofuels policy instruments are important in the development and diffusion of biogas as a transport fuel in Sweden. Their effectiveness with links to geodemographic conditions has not been analysed systematically in studying biogas development in a less urbanised regions, with high potential and primitive gas infrastructure. One such region identified is Gävleborg in Sweden. By using value chain statistics, interviews with related actors, and studying biofuels policy instruments and implications for biogas development, it is found that the policy measures have not been as effective in the region as in the rest of Sweden due to different geodemographic characteristics of the region, which has resulted in impeded biogas development. In addition to factors found in previous studies, the less-developed biogas value chain in this region can be attributed particularly to undefined rules of the game, which is lack of consensus on trade-off of resources and services, unnecessary competition among several fuel alternatives, as well as the ambiguity of municipalities’ prioritization, and regional cultural differences. To strengthen the regional biogas sector, system actors need a strategy to eliminate blocking effects of identified local factors, and national policy instruments should provide mechanisms to process geographical conditions in regulatory, economic support, and market formation.

Place, publisher, year, edition, pages
MDPI, 2021
Keywords
Biogas, Policy instruments, System analysis, Transport, Value chain
National Category
Environmental Engineering
Research subject
Sustainable Urban Development
Identifiers
urn:nbn:se:hig:diva-35814 (URN)10.3390/su13084560 (DOI)000645367500001 ()2-s2.0-85105173915 (Scopus ID)
Available from: 2021-05-17 Created: 2021-05-17 Last updated: 2023-06-27Bibliographically approved
Rambaree, K., Sundström, A., Wang, Z. & Wright, S. A. I. (2021). Qualitative stakeholder analysis for a Swedish regional biogas development: A thematic network approach. Sustainability, 13(14), Article ID 8003.
Open this publication in new window or tab >>Qualitative stakeholder analysis for a Swedish regional biogas development: A thematic network approach
2021 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 13, no 14, article id 8003Article in journal (Refereed) Published
Abstract [en]

The creation of pathways toward a societal transition to clean energy requires the engagement of multiple stakeholders with different and sometimes conflicting interests. In this connection, stakeholder analysis (SA) offers a technique for identifying, assessing and structuring different needs, interests and concerns related to different stakeholders within the context of sustainability. This article aims to present the findings from a qualitative stakeholder analysis (QSA) by using a thematic network approach (TNA), with the help of the ATLAS.ti software. It focuses on Project X, which was aimed at engaging multiple stakeholders and creating favorable conditions for small and medium-sized companies in a region situated in the central part of Sweden, with the potential to start biogas production. In this work, the findings and discussions of the QSA using TNA are structured by using the political, economic, social, technological, environmental and legal (PESTEL) themes of the model. The present study concludes that for the small-scale biogas industry to successfully develop an understanding of the possibilities of the biogas value chain, it is necessary to have analyzed the nature of the main themes by which various stakeholders relate to biogas production and envision their contribution to creating a sustainable society. Herein, we demonstrate that QSA by a TNA, combined with the application of a PESTEL model, are valuable analytical tools in sustainable project management. The lessons from Project X can be applied to other local biogas initiatives, as many identified threats and opportunities are shared by others. 

Place, publisher, year, edition, pages
MDPI, 2021
Keywords
Biogas, Energy, PESTEL, Qualitative stakeholder analysis, Thematic network approach, energy efficiency, energy management, energy resource, regional development, software, stakeholder, Sweden
National Category
Environmental Sciences
Research subject
Sustainable Urban Development
Identifiers
urn:nbn:se:hig:diva-36915 (URN)10.3390/su13148003 (DOI)000677006700001 ()2-s2.0-85111260052 (Scopus ID)
Funder
European Regional Development Fund (ERDF), 20204053
Available from: 2021-08-19 Created: 2021-08-19 Last updated: 2023-04-14Bibliographically approved
Pavlova, A., Sergienko, O., Wang, Z., Heikinheimo, L. & Obuka, V. (2020). Creating aligned studies in resource efficiency and circular economy in the Baltic sea region. In: 20th International Multidisciplinary Scientific GeoConference SGEM 2020: . Paper presented at 20th International Multidisciplinary Scientific GeoConference SGEM 2020 (pp. 685-692). SGEM
Open this publication in new window or tab >>Creating aligned studies in resource efficiency and circular economy in the Baltic sea region
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2020 (English)In: 20th International Multidisciplinary Scientific GeoConference SGEM 2020, SGEM , 2020, p. 685-692Conference paper, Published paper (Refereed)
Abstract [en]

Both in the Central Baltic (CB) countries and Russia, there is a need to develop current education regarding resource efficiency, which is a relatively new and complex issue. The aim of the paper is to present the results of the two parallel twinning international projects "CREA-RE" (Creating aligned studies in Resource Efficiency) and "CREA-RE-RU" (Creating aligned studies in Resource Efficiency in Sweden and Russia), which has been realized from 2018 to 2020. The main goal of the projects was to produceup-to-date aligned training materials for the higher vocational education training (VET) institutions around the CB and enhance cooperation between companies and higher VET. The project promoted the mainstreaming process in the region and best practices through addressing companies and future workers, i.e. students. The overall objective has been achieved through 1) Aligning and producing learning content to be used in higher environmental VET studies; 2) Producing a channel to share aligned materials; 3) Implementing joint innovative cooperation between companies and higher VET to ensure better matching of work opportunities in sustainable business. The activities enabled the creation of a holistic view of students and companies in the theme of resource efficiency and circular economy. Based on different know-how of the partners on the relatively new and complex issues within the theme of resource efficiency and circular economy, the project created aligned e-learning material with a new perspective in the area. Joint practice-oriented case studies promoted companies’ awareness on resource efficiency and enhance their competitiveness, meanwhile enable institutions’ better understanding of the needs in the working life. New information produces a competent labor force to support the integration of the CB labor market, also including Russia. 

Place, publisher, year, edition, pages
SGEM, 2020
Series
International Multidisciplinary Scientific GeoConference-SGEM, ISSN 1314-2704
Keywords
circular economy; resource efficiency; sustainable development; vocational education training; Baltic Sea Region
National Category
Environmental Engineering Economics and Business
Identifiers
urn:nbn:se:hig:diva-34773 (URN)10.5593/sgem2020/5.2/s22.084 (DOI)2-s2.0-85099769742 (Scopus ID)978-619-7603-11-8 (ISBN)
Conference
20th International Multidisciplinary Scientific GeoConference SGEM 2020
Available from: 2021-01-20 Created: 2021-01-20 Last updated: 2021-02-03Bibliographically approved
Carlos-Pinedo, S., Wang, Z., Eriksson, O. & Soam, S. (2020). Study of the digestion process at a full-scale solid-state biogas plant by using ORWARE: Model modification and implementation. Waste Management, 107, 133-142
Open this publication in new window or tab >>Study of the digestion process at a full-scale solid-state biogas plant by using ORWARE: Model modification and implementation
2020 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 107, p. 133-142Article in journal (Refereed) Published
Abstract [en]

The configuration of the reactor influences the digestion process and thus the product yields; other factors such as the rate of biogas production or biogas loss also affect the process specifically with high solid configuration. With these in mind, the ORganic WAste REsearch (ORWARE) anaerobic digestion sub-model was modified to be able to study solid-state anaerobic digestion (SS-AD) (using plug-flow reactor). The simulation results from the updated model agreed with the operational data with respect to methane yield, digestate yield and energy turnover. The model was found to be sensitive to changes in feedstock composition but to a lesser extent to changes in process temperature and retention time. By applying the model on several cases of liquid anaerobic digestion (L-AD), it was noticed that L-AD at mesophilic condition with 25 retention days seemed to be superior to other cases of L-AD with regard to energy turnover. However, even if similar methane production were observed for L-AD and SS-AD, the model suggested higher energy turnover for the case of SS-AD at thermophilic condition, being 10% more in average in comparison with cases of L-AD.

Place, publisher, year, edition, pages
Elsevier, 2020
Keywords
System assessment model, Solid-state anaerobic digestion, Full-scale, Methane production, Feedstock
National Category
Industrial Biotechnology
Research subject
Sustainable Urban Development
Identifiers
urn:nbn:se:hig:diva-32177 (URN)10.1016/j.wasman.2020.03.036 (DOI)000536511400015 ()32283487 (PubMedID)2-s2.0-85082933758 (Scopus ID)
Note

The financial support from the Gästrike Återvinnare Utveckling AB and the research foundation Gästrikeregionens miljö is gratefully acknowledged.

Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2023-12-15Bibliographically approved
Guven, H., Wang, Z. & Eriksson, O. (2019). Evaluation of future food waste management alternatives in Istanbul from the life cycle assessment perspective. Journal of Cleaner Production, 239, Article ID 117999.
Open this publication in new window or tab >>Evaluation of future food waste management alternatives in Istanbul from the life cycle assessment perspective
2019 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 239, article id 117999Article in journal (Refereed) Published
Abstract [en]

In developing countries like Turkey, food waste has the highest share compared to other municipal solid waste components. A detailed life cycle assessment has been performed to evaluate different food waste management options (i.e., landfilling, anaerobic digestion, thermal treatment, co-treatment with municipal wastewater) for Istanbul which is the largest city of Turkey and Europe. The current waste management has the worst environmental performance compared to proposed waste management scenarios as follows: Anaerobic digestion, thermal treatment and co-treatment with municipal wastewater. The thermal treatment scenario has been found to have the best environmental performance in most of the impact categories including climate change. The anaerobic digestion scenario ranks in the first place only in freshwater eutrophication, which is attributed to avoided fertilizer use in this scenario. A drastic improvement with 866% has been found in this category if the anaerobic digestion scenario was followed. Co-treatment with municipal wastewater refers to use of food waste disposers at households and provides improvements especially in marine eutrophication and ecotoxicity. Lower effluent emissions by means of biological wastewater treatment in the co-treatment scenario compared to other proposed scenarios lead to better performance in these categories. Various sub-scenarios have also been investigated such as using biogas as vehicle fuel, replacing a combined heat and power with a condensing plant and increasing food waste addition to sewer lines. Important improvements are not achievable in the first two sub-scenarios; however, increasing food waste addition to sewer lines reduces various environmental impact categories by −41% and −60%. © 2019 Elsevier Ltd

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Anaerobic digestion, Biogas, Food waste, Incineration, Landfilling, Life cycle assessment, Biological water treatment, Climate change, Cogeneration plants, Developing countries, Effluent treatment, Effluents, Environmental management, Eutrophication, Fuels, Heat treatment, Heating, Lead removal (water treatment), Life cycle, Municipal solid waste, Sewers, Waste incineration, Wastewater treatment, Biological waste water treatment, Combined heat and power, Environmental performance, Life Cycle Assessment (LCA), Management scenarios, Municipal wastewaters
National Category
Other Civil Engineering
Research subject
Sustainable Urban Development
Identifiers
urn:nbn:se:hig:diva-30584 (URN)10.1016/j.jclepro.2019.117999 (DOI)000487237100073 ()2-s2.0-85070610467 (Scopus ID)
Available from: 2019-08-26 Created: 2019-08-26 Last updated: 2020-11-23Bibliographically approved
Carlos-Pinedo, S., Wang, Z. & Eriksson, O. (2019). Methane yield from SS-AD: Experiences to learn by a full spectrum analysis at laboratory-, pilot- and full-scale. Biomass and Bioenergy, 127, Article ID 105270.
Open this publication in new window or tab >>Methane yield from SS-AD: Experiences to learn by a full spectrum analysis at laboratory-, pilot- and full-scale
2019 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 127, article id 105270Article, review/survey (Refereed) Published
Abstract [en]

Solid-state anaerobic digestion (SS-AD) takes place when solid content of the substrate is higher than 15%. Some advantages of this technology have been recognized as e.g., less required water added to raw feedstock and consequently minimized digester size and cost, higher volumetric organic loading rates (OLR) that may lead to higher efficiency methane yield and better acceptance of a wide range of feedstocks. However, scientific studies of SS-AD at pilot- and full-scale are very few and difficulties have been reported in operating SS-AD, especially when the system undergoes a scale-up, where methane production is the purpose. As a result, this review gives a summary of scientific studies for SS-AD processes at laboratory-, pilot- and full-scale, where a great diversity of substrate composition, reactor design and operational parameters have been categorized, and their performances in terms of methane yield have been analyzed. This, in turn, helps to identify that factors affecting methane yields at different scales arise mainly from operational conditions as well as the characteristic of feedstocks. This review even contributes to suggest several strategies for improvement of methane yield at full-scale.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Solid-state anaerobic digestion, Methane yield, Improvement
National Category
Other Environmental Engineering
Research subject
no Strategic Research Area (SFO)
Identifiers
urn:nbn:se:hig:diva-30037 (URN)10.1016/j.biombioe.2019.105270 (DOI)000478564300033 ()2-s2.0-85067212403 (Scopus ID)
Available from: 2019-06-19 Created: 2019-06-19 Last updated: 2024-02-12Bibliographically approved
Guven, H., Eriksson, O., Wang, Z. & Ozturk, I. (2018). Life cycle assessment of upgrading options of a preliminary wastewater treatment plant including food waste addition. Water Research, 145, 518-530
Open this publication in new window or tab >>Life cycle assessment of upgrading options of a preliminary wastewater treatment plant including food waste addition
2018 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 145, p. 518-530Article in journal (Refereed) Published
Abstract [en]

Life cycle assessment (LCA) is a beneficial tool to evaluate the performance of wastewater treatment plants (WWTPs) and to compare different upgrading options. The main objective of this study is to investigate the environmental impact of upgrading options of a preliminary WWTP in Istanbul, Turkey. The preliminary plant currently consists of mechanical treatment units and various upgrading options including primary treatment and high-rate activated sludge system (HRAS) process as well as the addition of food waste to wastewater were compared. Results showed that the baseline scenario (S0) had worse performance than all future scenarios (S1-3) except for climate change. The scenario of adding food waste to wastewater (S3) has the best performance in climate change, terrestrial acidification, terrestrial ecotoxicity and fossil depletion. Increased addition of food waste was also tested in the sensitivity analysis, and major improvements were obtained especially in climate change and terrestrial ecotoxicity.

Keywords
Food waste, High-rate activated sludge process, Life cycle assessment, Primary treatment, Sludge, Wastewater treatment plant upgrading
National Category
Environmental Engineering
Identifiers
urn:nbn:se:hig:diva-27906 (URN)10.1016/j.watres.2018.08.061 (DOI)000449137700049 ()30195101 (PubMedID)2-s2.0-85053136201 (Scopus ID)
Note

Corrigendum: https://doi.org/10.1016/j.watres.2019.115408

ISI-id: 000509632100079

Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2021-04-28Bibliographically approved
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