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Sustainable Exploitation of Agricultural, Forestry, and Food Residues for Green Nanotechnology Applications
Published in Devarajan Thangadurai, Saher Islam, Jeyabalan Sangeetha, Natália Cruz-Martins, Biogenic Nanomaterials, 2023
Luciano Paulino Silva, Ariane Pandolfo Silveira, Cínthia Caetano Bonatto, Eduardo Fernandes Barbosa, Kelliane Almeida Medeiros, Lívia Cristina De Souza Viol, Tatiane Melo Pereira, Thaís Ribeiro Santiago, Vera Lúcia Perussi Polez, Victoria Baggi Mendonça Lauria
Nowadays, agriculture, agroindustry, forestry, and food industry generate huge amounts of co-products, by-products, and residues. Notably, such materials depict an important business issue to be managed but otherwise can also be considered attractive economically and transformable into materials with high value-added, including nanomaterials. Really, waste valorization represents a major concern in the global economy of the 21st century, and nanotechnology offers the means of developing novel materials based on wastes and residues that exhibit sustainable aspects and innovative properties. Particularly, green nanotechnology solutions emerge from physical, chemical, biological, and engineering sciences as the most relevant example of integrating technological innovation with sustainability principles. Hence, the purpose is to achieve competitive advantages aligned with Sustainable Development Goals to ensure environmental sustainability, healthy lives, and promote entrepreneurship initiatives.
A Logistics Analysis for Advancing Carbon and Nutrient Recovery from Organic Waste
Published in Subhas K. Sikdar, Frank Princiotta, Advances in Carbon Management Technologies, 2021
Edgar Martín-Hernández, Apoorva M. Sampat, Mariano Martin, Victor M. Zavala, Gerardo J. Ruiz-Mercado
In developed societies, waste valorization to energy and material recovery represents a business opportunity for circular economy. Furthermore, organic waste management provides a great opportunity towards the production of sustainable resources and energy (WEC, 2016) and the capability of replacing fossil-based fuels. For instance, capturing carbon through the production of bio-based chemicals derived from the biogas generated after the anaerobic digestion of the organic wastes offers an alternative for replacing the generation of electricity and heat from fossil fuels with renewable sources throughout the production of bio-methane. It is reported that about 250 operational projects in the U.S. (Nov. 2017)2 have avoided the emissions of 3.2 × 106 tons CO2e (equivalent to annual emissions from 680,000 cars)3 and generated 1.03 × 106 MWh of energy (enough to power 96,000 U.S. homes/yr).4 Other studies have evaluated the potential of some regions to meet all their NG needs by using biogas instead (Taifouris and Martín, 2018). Therefore, waste-to-energy initiatives have gained support in the context of a circular economy philosophy to enhance the development of sustainable process alternatives (Korhonen et al., 2018). Among the organic waste treatment technologies, anaerobic digestion is deemed as an interesting and promising alternative that serves a double objective when processing residues, mitigating the potential environmental and human health issues and producing valuable products that are incorporated into the economic cycle in the form of energy and chemicals.
Drivers-pressures-state-impact-response framework of hazardous waste management in China
Published in Critical Reviews in Environmental Science and Technology, 2022
Qudsia Kanwal, Xianlai Zeng, Jinhui Li
The waste valorization concept is applied in different industries to get value-added products. The various industrial wastes (e.g., ash from combustion, artificial gypsum, metal slag, and metallurgical waste, sludge, ornamental rock, sawdust, glass waste, and organic waste from food production and agricultural management ceramics) are generated in massive amounts worldwide can be used for the production of clay ceramics (tiles, bricks) ( Contreras et al., 2020). Recycling of polyoxymethylene polymers could facilitate through combined catalytic processing of polymer waste and biomass-derived diols (Beydoun & Klankermayer, 2020). Pyrolysis of mixed postconsumer waste plastics yields certain value-added products like diesel, gasoline, and aromatics (Nanda Kumar, 2018). Similarly, waste-activated sludge can be used as the feedstock to produce methane, generating electricity via incineration and thermal energy recovery (Rulkens, 2008; Zhang et al., 2018). Post-incineration carbon residues can also be utilized as alternative construction materials (e.g., brick manufacture and turf production) or adsorbents for environmental applications (Nanda Kumar, 2018; Zhang et al., 2018).
Characterization of food waste from different sources in Hong Kong
Published in Journal of the Air & Waste Management Association, 2019
Food wastes have emerged as potential feedstock for the production of chemicals and liquid fuels, which are considered as the second generation of waste valorization techniques. Oil-rich fractions from food wastes are good raw materials for conversion into esters, amines, acids, resins, surfactants, soaps, plasticizers, and lubricants (Lin et al. 2012). Biodiesel production is another novel technology for food waste recycling. Edible oils were commonly used as feedstock, but this created competition with the food market. Alternatives such as waste cooking oil, inedible oil, grease, and lard have been currently used as low-cost feedstock for biodiesel production (Karmee and Lin 2014). In choosing oils or fats for biodiesel production, the chemistry and economy of the process, as well as the oil content of the feedstock, should be considered (Karmakar, Karmakar, and Mukherjee 2010).
Methane, a renewable biofuel: from organic waste to bioenergy
Published in Biofuels, 2022
Mixtli J. Torres-Sebastián, Juan G. Colli-Mull, Lourdes Escobedo-Sánchez, Daniel Martínez-Fong, Leonardo Rios-Solis, María E. Gutiérrez-Castillo, Gloria López-Jiménez, María L. Moreno-Rivera, Luis R. Tovar-Gálvez, Armando J. Espadas-Álvarez
Waste valorization is the process of converting waste materials into more valuable products, including chemicals, materials, and fuels, like methane (CH4) [9]. For example, in the United States, around 15 GW are consumed in the treatment of organic-rich wastewater. But this organic matter has the potential to give 17 GW of power (instead of an expense, it can become a contribution) [10]. Biologically, methane is the final product of the microbial decomposition of organic matter in anaerobic environments, being a substrate for methanotrophic microorganisms. If methane reaches the atmosphere, it is photoconverted into carbon dioxide (CO2) [11].