Search Results (517)

The global fish industry is an essential contributor to food security and the economy; however, it produces considerable quantities of fish waste. Depending on species and processing methods, 20–80% of fish biomass is discarded as waste, amounting to almost 64 million tons annually. Conventional disposal methods such as landfilling, incineration, and wastewater discharge cause environmental pollution and greenhouse gas emissions. Therefore, for sustainable development, it is important to valorize fish waste into renewable energy and value-added products. Hence, this review aims to encourage the technical development of fish waste into bioenergy and bioresources by thoroughly studying key technologies for converting it into biogas, biodiesel, fertilizer, animal feed, and biochar. Although several studies have explored these technologies, most remain disjointed and lack a systematic assessment. Therefore, this work attempted to critically evaluate the technological principles, advantages, limitations, and optimization strategies of current valorization approaches. Furthermore, several recommendations have been proposed, including conducting pilot-scale trials, producing higher value-added products within a biorefinery system. Overall, this review provides a holistic outlook on the energy and resource conversion of fish waste, supporting sustainable waste management. Full article

Agro-industrial by-product valorization promotes the circular bioeconomy, food security, and sustainability by recycling waste products into reusable resources. This study evaluated various protein extraction methods for processed mustard seed (Brassica juncea) meal, including conventional alkaline (CON), enzyme-pretreated alkaline (ENZ), ultrasound-assisted alkaline (US), and enzyme-pretreated and ultrasound-assisted alkaline (ENZ+US) extraction methods. The protein content extracted from the various treatments ranged from 70.67% to 82.31% (molecular weights: 10–75 kDa), with morphology shifting from rough to smooth surfaces in enzymatic treatments. Viscozyme L hydrolysis of cell-wall polysaccharides in ENZ and ENZ+US treatments facilitated co-extraction of non-protein bioactives as shown by enhanced antioxidant capacities through hydrogen/electron donation mechanisms, including superior Folin–Ciocalteu reducing capacity (7.20–7.95 mg GAE/g), radical scavenging (DPPH•: 8.75–9.33; ABTS•⁺: 42.97–56.86 mg TE/g), and ferric-reducing antioxidant power (FRAP: 13.59–14.49 mg TE/g). Conversely, the US treatment may generate reactive species that reduce antioxidant capacity while increasing visual lightness (L*) and preserving in vitro digestibility (66.19%) at a level comparable to that of CON (67.63%). Meanwhile, the CON treatment exhibited the highest protein solubility across all pH levels, driving a higher emulsifying activity index (42.15 m²/g). In summary, this research demonstrates that B. juncea seed waste can be transformed into high-value functional ingredients by tailoring the extraction method to targeted product properties. However, low extraction yields present a significant bottleneck, and therefore industrial and economic feasibility will depend on future yield optimization in order to drive sustainable plant-based protein development. Full article

Afforestation is a high-potential and cost-effective climate change mitigation strategy, but its large-scale implementation raises sustainability concerns. It requires extensive areas of land, potentially conflicting with agriculture and impacting food security. Moreover, inappropriate forest expansion, such as the afforestation of naturally open habitats, could reduce habitats for non-forest organisms and may cause biodiversity loss. Here, we assess the global mitigation potential of afforestation by integrating environmental constraints and sustainable food system transformations within an integrated assessment model framework. Using the Asia-Pacific Integrated Model (AIM), including the AIM-Hub general equilibrium model and AIM-PLUM spatial land use allocation model, we evaluated seven scenarios incorporating biodiversity protection, soil quality enhancement, dietary shifts, food waste reduction, trade, and irrigation intensification. We found that environmental considerations reduce the maximum afforestation potential to 2.13 GtCO₂ yr⁻¹, highlighting the importance of accounting for land use trade-offs. However, sustainable food system transformations substantially recover this mitigation potential, increasing afforestation-based carbon sequestration to 5.01 GtCO₂ yr⁻¹ by 2100. Approximately 90% of this potential can be achieved at a cost below 50 USD tCO₂⁻¹. Our study emphasizes the need for integrated policies to balance climate mitigation with environmental conservation. Full article

Background/Objectives: Using straw as feed is crucial for addressing resource scarcity and waste-based environmental pollution and alleviating the contradiction between forage production and food security. However, rice straw has disadvantages such as a high lignin, cellulose, and hemicellulose content, as well as a dense cell wall structure, which greatly limit its utilization as feed. Improving the forage quality of rice straw through genetic breeding is an important means of enhancing its utilization rate. Methods: To explore the molecular basis underlying the improved nutritional and cell wall compositional traits of the rice lines (oszfp30-1 and oszfp30-2) obtained in previous studies, we conducted phenotypic, physiological, transcriptomic, and metabolomic analyses on oszfp30-1, oszfp30-2 and the wild type (WT) after 50 days of pot cultivation. Results: oszfp30-1 and oszfp30-2 exhibited higher plant height, above-ground biomass, crude protein, and crude fat content, while their hemicellulose, cellulose, and lignin contents were significantly lower than those of the wild type. Transcriptomics was used to identify 737 common differentially expressed genes (DEGs), and metabolomics was used to identify 189 common differentially expressed metabolites (DEMs). KEGG analysis revealed that these DEGs and DEMs were significantly enriched in terpene biosynthesis, starch and sucrose metabolism, phenylpropanoid biosynthesis, and amino sugar and nucleotide sugar metabolism. Conclusions: Our research reveals that the improvement in forage-quality-related traits is closely related to key genes involved in gibberellin synthesis, including GA20ox, GA2ox, and GA3ox; key genes involved in cellulose synthesis, including OsSUS and UGPase; key genes involved in hemicellulose synthesis, including UXS and IRX10; and key genes involved in lignin synthesis, including CCR, CAD, CCoAOMT, and COMT. These identified DEGs and DEMs are associated with the OsZFP30 mutation and may be downstream targets of this transcription factor, providing a foundation for further research on the OsZFP30 regulatory network. Full article

Unsustainable agricultural practices and overreliance on chemical fertilizers have led to severe environmental issues, such as soil and water pollution, loss of biodiversity, and risks to human and animal health. Moreover, plant diseases continuously decrease crop productivity and threaten global food security. Therefore, there is a strong need to focus on sustainable agricultural practices. Microbial biofertilizers emerge as environment-friendly alternatives to chemical fertilizers that help in nutrient solubilization and availability, soil fertility, and plant growth promotion, in addition to curbing the application of chemical fertilizers. Microbial inoculants enhance agricultural yield by performing complementary roles, such as facilitating nutrient uptake through biological nitrogen fixation and phosphate solubilization, promoting plant growth via phytohormone synthesis, and mitigating diseases by activating plant defense responses. A 2025 meta-analysis of 107 field studies in China reported mean yield increases of 22.3% in wheat, 13.6% in rice, 12.8% in maize, and 65.4% in millet, while a field study in saline soil reported a 25% reduction in NPK fertilizer use in barley without reducing the grain yield. This review provides an overview of the major types of microbial biofertilizers, their modes of action, and their use in important cropping systems. Special emphasis is placed on microbial consortia that can enhance nutrient cycling, plant productivity, and tolerance to abiotic stress factors. The application of nanotechnology, genetically engineered microorganisms, and combinations of microbial inoculants with organic waste are some strategies that could be adopted for next-generation biofertilizer development. The review also addresses the major hurdles in the formulation, field performance, and commercialization of microbial biofertilizers. Future perspectives revolve around optimizing microbial formulations, applying advanced biotechnological tools, and developing enabling policies for the rapid adoption of microbial biofertilizers for sustainable agriculture. Full article

This narrative literature review examines African American family fishing as a historically grounded practice of food provision, cultural continuity, place-based learning, and environmental stewardship, and considers its conceptual relationship to the United Nations Sustainable Development Goals (SDGs). The review synthesizes an analytical corpus of 41 works spanning history, fishing participation, food insecurity, food sovereignty, foodways, place attachment, environmental education, and social-ecological systems. The literature indicates that Black fishing cannot be understood as recreation alone; historically and contemporarily, it has connected food acquisition, family interaction, livelihood, cultural memory, and community identity. These functions are conceptually aligned with SDGs 2, 3, and 10 through plausible pathways involving culturally meaningful food access, family-centered outdoor activity, and attention to racial disparities in food security, environmental access, and institutional representation. Family fishing may also provide a place-based learning context relevant to SDG 4, while responsible harvesting, reduced waste, and ecological literacy may contribute to SDG 12. Repeated engagement with local waters may cultivate belonging and stewardship; freshwater relationships are most directly relevant to SDG 6, whereas coastal, estuarine, and marine contexts may contribute to SDG 14. These are interpretive alignments, not measured SDG outcomes. The review concludes that family-centered pilot initiatives may productively integrate cultural history, ecological education, food skills, mentorship, and community leadership, subject to feasibility testing and empirical evaluation. Contemporary family-level research is needed to examine harvest, food sharing, learning, health, access, and stewardship across generations. Full article

Aflatoxin B1 (AFB1) contamination of feed used in poultry farming is an important issue in food safety since it compromises animal productivity and leads to the transfer of toxic waste to the food chain. In this sense, as an alternative to conventional mineral adsorbents, in the present study, two sustainable and low-cost biochars were obtained from agro-industrial waste of orange peel (B-OP) and guava leaves (B-GL) to evaluate their efficiency in the removal of AFB1 in an in vitro avian model. Biochars were obtained from pyrolysis and characterized in terms of particle size, surface area, morphology, surface charge, surface chemistry, and pore size. Furthermore, their adsorption capacity was evaluated in an avian in vitro model. The results showed that B-OP had a smaller particle size (55.30 µm), a larger specific surface area (31.50 m²/g), and a smaller pore size (2.38 nm) than B-GL (82.88 µm, 9.74 m²/g, and 6.24 nm). Furthermore, the biochars presented different morphologies, FTIR spectra, and zeta potentials. In the avian in vitro model, the feed matrix reduced the effectiveness of AFB1 removal compared to the in vitro model using only buffer solutions. However, B-OP (27.4%) significantly outperformed B-GL (22.7%) in the intestinal segment. The valorization of these agro-industrial wastes into biochar represents an economical and sustainable strategy for removing AFB1 and strengthening food security. Full article

Global population growth, climatic extremes and rising resource pressures necessitate innovative agricultural methods to boost food, feed, fibre and fuel production sustainably. Seed enhancement technologies (SETs), such as seed coating and priming, have emerged as effective strategies to improve seed viability and vigour, seedling establishment and overall crop yield. Conventional seed treatments include seed coating (film coating, encrusting, pelleting) and seed priming (hydro-, osmo-, halo- bio-, nutri-, hormonal-, chemical- and solid matrix priming). They offer advantages such as improved seed handling, uniform germination and promotion of early growth. However, they also have significant drawbacks, including on soil health and off-target pollution from synthetic polymers and pesticides, seed longevity issues from re-drying and outcomes that can vary among different crops, soils and environments. To tackle these issues, new non-traditional SETs are being investigated, including nanotechnology, novel biodegradable coatings and agrichemical-free biostimulants, such as plant growth promoting microorganisms. These innovative methods demonstrate great promise in enhancing active and crop performance while minimising environmental impacts by providing alternatives to materials derived from fossil fuels and that contribute to waste and pollution. This review critically examines both conventional and novel SETs, discusses their pros and cons and outlines strategic research and industry directions to enhance agricultural sustainability and productivity in light of global food and resource security challenges. Full article

Food security has always been the leading priority of national strategic deployment. Given the dual background of the continuous upgrading of dietary structures and the rapid growth of the food delivery industry, takeaway staple food waste has become increasingly prominent. However, a gap remains in the existing literature concerning the diversification behavior of consumers’ staple food in the context of food delivery, while even less discussion involves the driving mechanism of diversified willingness to pay (WTP). Based on 1046 survey data points related to consumption behavior concerning food and beverage takeaway staple food, this paper systematically examined the main influencing factors of consumers’ variety-seeking behavior and their WTP for staple food diversification. The following findings were obtained. There is substantial consumer demand for staple food diversification: over 80% of respondents preferred varied staple options and showed positive WTP. Dietary knowledge exerts a consistently positive and significant influence on both staple food variety-seeking behavior and consumers’ WTP for multigrain rice. An intriguing age-related pattern emerges: older consumers exhibit stronger staple food variety-seeking behavior, yet they are less willing to pay a premium for multigrain rice. In addition, dietary knowledge and frugality awareness positively affect WTP for diversified staple food portions, but personal characteristics appeared to have no significant impacts on WTP for small portions of rice. These findings provide demand-side empirical evidence and policy implications for reducing takeaway staple food waste and consolidating the foundations of food security. Full article

The study presents methodological approaches to developing regional agri-food strategies integrating economic, social, and environmental indicators, aiming to improve socio-economic and environmental efficiency in the context of food security. To assess regional sustainable development, a hierarchical cluster analysis using Ward’s method was applied to compare Russian regions based on indicators of agricultural specialization, economic efficiency, food security, social conditions, and environmental impact. The analysis identified seven distinct regional clusters with significant socio-economic and environmental differences. A critical finding is that all clusters exhibit persistent problems with waste disposal and neutralization, alongside an acute shortage of investment for technological modernization and additional processing capacity. Key priorities for improving efficiency in achieving food security are identified, and differentiated sustainable development strategies for the selected groups are proposed, including recommendations for adapting governance mechanisms and state support. The need for fundamentally new forms of financing innovative businesses is substantiated. This study provides a differentiated framework for developing regulatory tools for regional agri-food systems based on cluster analysis results. The findings have practical value for planning socio-economic and environmental development programs and for formulating state innovation policy in agricultural support. Full article

The $300-billion global poultry industry, a cornerstone of food security, faces two interconnected systemic challenges: pre-incubation quality degradation wastes up to 15% of incubation capacity on non-viable eggs, while post-hatch male chick culling results in the annual euthanasia of 7 billion day-old layer chicks. Existing non-destructive detection research remains fragmented, treating pre-incubation freshness assessment and in ovo sexing as disconnected domains and creating a persistent lab-to-field gap that blocks industrial translation. This review establishes a unified process-centric framework covering the full detection workflow, and critically evaluates state-of-the-art sensing modalities across the entire hatching cycle. The analysis demonstrates that implementation bottlenecks do not reside in laboratory classification accuracy, which frequently exceeds 90% under controlled conditions, but in cross-batch generalizability, embryonic biosafety assurance, and high-throughput online operation. A hierarchical detection strategy with closed-loop traceability is outlined to bridge the lab-to-field gap. This work provides a structured roadmap to improve both economic efficiency and ethical sustainability of global poultry production. Full article

Aquaculture has rapidly expanded, surpassing capture fisheries and playing a vital role in global food security. However, this growth raises environmental concerns, especially regarding nitrogen waste accumulation in recirculating aquaculture systems (RASs). Nitrogen compounds from uneaten feed and fish excreta, mainly ammonia (NH₃) and nitrite (NO₂⁻), lead to water pollution, eutrophication, and greenhouse gas emissions. This study describes the setup and the efficiency of a new photo-electrocatalytic (PEC) system in reducing nitrogen waste in a high-density RAS for rainbow trout (30 kg/m³). The PEC system, an evolution of a pure photocatalytic system, was integrated in the units of the RAS and tested for the first time in field conditions, combining photocatalysis and electrochemical oxidation to convert toxic nitrogen species (NH₃) into less harmful nitrogen forms (NO₃⁻ and N₂), aiming to mitigate both water and atmospheric pollution. Over a 4-week period, water nitrogen compounds, ammonia and greenhouse gases (carbon dioxide, nitrous oxide and methane) emitted by water were continuously monitored in two groups of three tanks (PEC vs. control). Each tank was equipped as an independent RAS unit. PEC treatment led to significantly lower NH₃ concentrations (0.96 ± 0.2 mg/L vs. 1.78 ± 0.2 mg/L, p < 0.01), lower NO₂⁻ levels and higher NO₃⁻ levels (61.77 ± 2.14 mg/L vs. 53.10 ± 2.14 mg/L, p < 0.01) in water, indicating efficient nitrogen oxidation. Gaseous emissions were also reduced: NH₃ (1.49 vs. 2.64 mg/m²/day, p < 0.05) and N₂O (1.44 vs. 2.88 mg/m²/day, p < 0.05). These results support PEC technology as a promising solution for improving nitrogen management in intensive aquaculture. Although challenges remain in optimizing energy use and scalability, PEC offers a valuable strategy for reducing environmental impact while sustaining productivity in the aquaculture industry. Full article

Background: Food insecurity remains a major public health challenge in many low- and middle-income countries, where environmental and socioeconomic conditions influence household access to adequate, safe, and nutritious food. Objectives: This study aimed to evaluate the associations between environmental and socioeconomic factors and household food security in Riobamba, Ecuador. Methods: A cross-sectional survey was conducted among 382 households using the Latin American and Caribbean Food Security Scale (ELCSA), complemented by structured and Likert-scale questions addressing agricultural production practices, food handling, waste management, and food choice and dietary diversity. Household food security status was classified according to the standard ELCSA scoring procedure and subsequently grouped into categories representing adequate or inadequate household food access and consumption. Binary Logit and Probit models were estimated to identify factors associated with household food security. Results: The Probit model showed slightly better predictive performance (classification accuracy = 73.56%; Pseudo R² = 0.2729; LR χ² = 143.94; p < 0.01). Household income was the strongest predictor of food security status (Logit coefficient = 1.1977; p < 0.01). Among the environmental variables, agricultural production practices (β = 0.8649; p < 0.01), food handling practices (β = 0.3714; p < 0.05), and food choice and dietary diversity (β = 0.6479; p < 0.01) were positively associated with adequate household food access and consumption, whereas waste management practices were not significantly associated. Household size and gender were also significantly associated with food security outcomes. Conclusions: These findings indicate that household food security in urban Ecuadorian settings is associated with both environmental and socioeconomic conditions. Policies promoting sustainable agricultural practices, safe food handling, dietary diversity, and socioeconomic well-being may contribute to strengthening household food security and nutrition. Full article

The increasing demand for lithium-ion batteries (LIBs) raises concerns about the security of critical raw material supply and the management of hazardous waste. Efficient recycling can alleviate these issues by transforming spent batteries into high-value secondary materials for the circular economy. Industrial recycling has traditionally focused on the recovery of nickel (Ni) and cobalt (Co), whereas lithium (Li) recovery has often been sidelined due to technical complexities and fluctuating economic incentives. To meet the European Union (EU) Batteries Regulation target of 80% lithium recovery by the end of 2031, technically effective and economically viable lithium recovery strategies are required. This study investigates the use of food-grade sucrose as an organic reductant for the targeted recovery of lithium from NMC622 and NCA battery materials. The process combines sucrose-assisted reductive roasting with selective water leaching. The effects of roasting temperature, holding time, sucrose dosage, and heating rate were systematically evaluated and optimised. Under the best conditions of 600 °C, 15 min, 15 wt% sucrose, and a heating rate of 20 °C/min, lithium leaching efficiencies of 93.2% and 87.6% were achieved for separated NMC622 cathode material and NMC622-derived black mass, respectively. The method was also applicable to NCA-based black mass, reaching 83.7% lithium recovery under the same conditions. Mechanistic analysis revealed that lithium release was strongly controlled by the extent of transition metal reduction. Cobalt was fully reduced to its metallic state under all tested conditions. However, maximum lithium recovery required nickel to be reduced to metallic Ni and manganese-containing phases to be converted to MnO. The sucrose-assisted roasting process was rapid and holding times longer than 15 min decreased lithium recovery. This decrease was caused by the formation of poorly soluble lithium-containing phases, such as LiF and Li₃PO₄. F composition analysis showed the black mass (1.06 wt%) and anode fractions (2.26 wt%) to contain significantly more F than the cathode fraction (0.46 wt%), hence leading to the 5% Li leaching efficiency difference between cathode and black mass fractions under most conditions tested. Overall, these results demonstrate that sucrose-assisted reductive roasting, followed by selective water leaching, provides a rapid and effective route for high-efficiency lithium recovery from NMC- and NCA-based battery materials. Full article

Insect larvae are naturally part of the diet of farmed animals, for instance poultry, pigs, and fish. Thus, the black soldier fly, Hermetia illucens (Linnaeus, 1758) (Diptera: Stratiomyidae) has been grown for use as a source of protein in animal feed. Black soldier fly larvae (BSFL) feed on various organic materials and bioaccumulate the nutrients obtained from the organic materials. This results in BSFL with protein content ranging from 25 to 60% depending on the type of organic material fed. Feeding strategies customized for optimizing BSFL growth and protein deposition are essential for sustainably increasing the production of BSFL to meet the growing demand for their use in animal feed. Feeding strategies for sustainable BSFL production should: ensure nutrient utilization efficiency to optimize BSFL growth and protein deposition; use readily available local organic material of good nutritional quality, safe, and acceptable for use in the animal feed industry; ensure economic and environmental sustainability; and adhere to existing legislature. While substantial information on feeding BSFL is available in different data sources, the literature mainly focuses on increasing BSFL production without integrating sustainability issues, especially economic and environmental sustainability. The objective of this review was to synthesize and consolidate existing information on feeding strategies for BSFL production from different sources and point out sustainable feeding strategies, existing knowledge gaps, and aspects that require further research. The purpose of the review is to provide information on feeding practices for the sustainable production of BSFL to meet the growing demand for BSFL in animal feed. This will contribute to improved food security, environmental management, and job creation. BSFL can feed on mixed organic material food sources more efficiently, reducing the volume of the food by up to 72%, while bioaccumulating the nutrients better than when feeding on individual organic sources such as fruit or vegetable waste. Full article