Waste Management: Valorisation Is the Way
Abstract
:1. Introduction
2. Theoretical Background
- Valorisation as energy (waste-to-energy), which is carried out using technologies that generate energy that comes from the materials containing this type of waste, although they also generate a small amount of waste that is difficult to eliminate. Technology will be the key, and thermochemical technologies such as incineration, gasification, pyrolysis, plasma technologies, or combinations of these will therefore be suitable for certain waste fractions [5,17];
- Valorisation as materials (waste-to-product), in which new materials are obtained, or a large portion of them are recycled, to avoid the use of new raw materials for the manufacture of materials. The materials that can be recovered are paper, glass and organic material. Composting serves to valorise organic material [5].
3. Materials and Methods
3.1. Data Collection
3.2. Methodology
- Periods: 1987–2010; 2011–2015; 2016–2021;
- Unit of analysis: words (author’s words, source’s words and added words);
- Data reduction: not necessary in this analysis;
- Kind of matrix: co-occurrence;
- Network reduction: not necessary in this analysis;
- Normalisation: equivalence index;
- Clustering algorithm: simple centres algorithm; maximum network size: 12, and minimum network size: 3;
- Document mapper: core mapper;
- Quality measures: h-index, average citations, sum citations;
- Longitudinal: evolution map: inclusion index; overlapping map: Jaccard’s index.
- ‘Motor themes’ are located in the upper right quadrant. They are well developed and important topics for structuring a field of research;
- Basic and transversal themes are located in the lower-right quadrant. Cross-cutting and basic themes are located there;
- Highly developed and isolated themes are located in the upper-left quadrant. They are subjects of marginal importance for the field, because they present external links without importance, although they maintain well-developed internal links;
- Emerging or declining themes are in the lower left quadrant. They are marginal, underdeveloped, emerging, or missing issues.
4. Results and Discussion
4.1. Longitudinal Map
4.2. Strategic Map and Thematic Network
4.2.1. Period 1987–2010
4.2.2. Period 2011–2015
4.2.3. Period 2016–2021
5. Conclusions
5.1. Theoretical Implications
5.2. Practical Implications
5.3. Limitations and Future Lines of Research
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Number | Period | Number of Documents |
---|---|---|
1 | 1987–2010 | 39 |
2 | 2011–2015 | 55 |
3 | 2016–2021 | 120 |
Total | 214 |
Source | Documents |
---|---|
Waste Management | 22 |
Resources Conservation and Recycling | 14 |
Waste and Biomass Valorisation | 11 |
Journal of Cleaner Production | 10 |
Journal of Hazardous Materials | 9 |
Sustainability | 7 |
Renewable Energy | 5 |
Bioresource Technology | 4 |
Construction and Building Materials | 4 |
Journal of Material Cycles and Waste Management | 4 |
Energies | 4 |
International Journal of Life Cycle Assessment | 4 |
Title | Source | Year | Number of Citations |
---|---|---|---|
Food waste as a valuable resource for the production of chemicals, materials and fuels. Current situation and global perspective [1] | Energy & Environmental Science | 2013 | 524 |
Possible applications for municipal solid waste fly ash [9] | Journal of Hazardous Materials | 2003 | 273 |
Life cycle assessment of biofibres replacing glass fibres as reinforcement in plastics [8] | Resources Conservation and Recycling | 2001 | 222 |
The crucial role of waste-to-energy technologies in enhanced landfill mining: A technology review [5] | Journal of Cleaner Production | 2013 | 209 |
Food waste generation and industrial uses: A review [20] | Waste Management | 2015 | 200 |
The valorisation of plastic solid waste (PSW) by primary to quaternary routes: From re-use to energy and chemicals [14] | Progress in Energy and Combustion Science | 2010 | 197 |
Automotive shredder residue (ASR): Reviewing its production from end-of-life vehicles (ELVs) and its recycling, energy or chemicals’ valorisation [21] | Journal of Hazardous Materials | 2011 | 160 |
Physical and chemical characterisation of crude meat and bone meal combustion residue: “Waste or raw material?” [22] | Journal of Hazardous Materials | 2005 | 131 |
Valorisation of bark for chemicals and materials: A review [23] | Renewable & Sustainable Energy Reviews | 2013 | 124 |
Study of bio-oils and solids from flash pyrolysis of sewage sludges [24] | Fuel | 2009 | 118 |
Carbon footprint of food waste management options in the waste hierarchy—a Swedish case study [25] | Journal of Cleaner Production | 2015 | 107 |
Advances on waste valorisation: New horizons for a more sustainable society [26] | Energy Science and Engineering | 2013 | 88 |
Environmental sustainability assessment of food waste valorisation options [27] | Resources, Conservation and Recycling | 2014 | 87 |
Laying waste to mercury: Inexpensive sorbents made from sulfur and recycled cooking oils [28] | Chemistry—A European Journal | 2017 | 83 |
Value-added chemicals from food supply chain wastes: State-of-the-art review and future prospects [29] | Chemical Engineering Journal | 2019 | 63 |
Manufacture of hybrid cements with fly ash and bottom ash from a municipal solid waste incinerator [30] | Construction and Building Materials | 2016 | 62 |
Recycling and recovery of post-consumer plastic solid waste in a European context [31] | Thermal Science | 2012 | 57 |
Disposal options for polluted plants grown on heavy metal contaminated brownfield lands—A review [32] | Chemosphere | 2017 | 51 |
Cluster | Centrality | Centrality Range | Density | Density Range | Documents Count | h-Index | Average Citations | Sum Citations | |
---|---|---|---|---|---|---|---|---|---|
1987–2020 | Residues | 141.60 | 1.00 | 53.59 | 0.80 | 7 | 4 | 45 | 315 |
Resource recovery | 123.03 | 0.80 | 130.90 | 1.00 | 3 | 3 | 161 | 483 | |
Waste | 109.85 | 0.60 | 31.11 | 0.40 | 8 | 7 | 39.25 | 314 | |
Fuel | 33.33 | 0.40 | 43.75 | 0.60 | 2 | 2 | 70.5 | 141 | |
Municipal solid waste | 23.03 | 0.20 | 13.33 | 0.20 | 2 | 1 | 2.5 | 5 | |
2011–2015 | Incineration | 200.12 | 1.00 | 42.60 | 0.44 | 25 | 14 | 29.96 | 749 |
Anaerobic digestion | 156.89 | 0.89 | 66.99 | 0.78 | 8 | 7 | 53.125 | 425 | |
Pyrolysis | 130.62 | 0.78 | 25.09 | 0.22 | 7 | 4 | 15.857 | 111 | |
Waste | 100.40 | 0.67 | 37.99 | 0.33 | 9 | 8 | 56.889 | 512 | |
Environmental impact | 94.29 | 0.56 | 52.01 | 0.56 | 9 | 9 | 50.889 | 458 | |
Lactic acid | 51.82 | 0.44 | 20.83 | 0.11 | 3 | 2 | 241.667 | 725 | |
Silica | 33.74 | 0.33 | 60.00 | 0.67 | 3 | 2 | 9.333 | 28 | |
Fast pyrolysis | 20.01 | 0.22 | 81.25 | 0.89 | 1 | 1 | 124 | 124 | |
Construction | 15.65 | 0.11 | 150.00 | 1.00 | 1 | 0 | 0 | 0 | |
2016–2021 | Valorisation | 197.17 | 1.00 | 39.92 | 0.90 | 93 | 18 | 9.688 | 901 |
Recycling | 129.97 | 0.90 | 13.20 | 0.30 | 12 | 6 | 13.167 | 158 | |
Ash | 123.86 | 0.80 | 30.33 | 0.80 | 27 | 8 | 9.852 | 266 | |
Electricity | 102.02 | 0.70 | 58.44 | 1.00 | 5 | 2 | 18.6 | 93 | |
Optimisation | 90.14 | 0.60 | 29.55 | 0.70 | 7 | 3 | 5.714 | 40 | |
Pyrolysis | 88.60 | 0.50 | 12.93 | 0.20 | 10 | 3 | 6.5 | 65 | |
Wastewater treatment | 86.48 | 0.40 | 13.76 | 0.50 | 13 | 6 | 9.538 | 124 | |
Systems | 59.65 | 0.30 | 13.56 | 0.40 | 4 | 3 | 11 | 44 | |
Products | 29.42 | 0.20 | 12.50 | 0.10 | 3 | 2 | 10.333 | 31 | |
Pulp | 14.61 | 0.10 | 21.88 | 0.60 | 2 | 1 | 4 | 8 |
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Gemar, G.; Soler, I.P.; Sánchez-Teba, E.M. Waste Management: Valorisation Is the Way. Foods 2021, 10, 2373. https://doi.org/10.3390/foods10102373
Gemar G, Soler IP, Sánchez-Teba EM. Waste Management: Valorisation Is the Way. Foods. 2021; 10(10):2373. https://doi.org/10.3390/foods10102373
Chicago/Turabian StyleGemar, German, Ismael P. Soler, and Eva M. Sánchez-Teba. 2021. "Waste Management: Valorisation Is the Way" Foods 10, no. 10: 2373. https://doi.org/10.3390/foods10102373
APA StyleGemar, G., Soler, I. P., & Sánchez-Teba, E. M. (2021). Waste Management: Valorisation Is the Way. Foods, 10(10), 2373. https://doi.org/10.3390/foods10102373