Examinando por Materia "Circular economy"

Mostrando 1 - 4 de 4

Analysis of binder proportions on the calorific value in a briquette made from cocoa pod husk in the Peruvian Amazon
(Frontiers Media S.A., 2025-09-22) Solórzano Acosta, Richard Andi; Paquiyauri, Alexandra; Neyra, Walter; Siqueira Bahia, Rita de Cassia; Vallejos Torres, Geomar
Introduction: The growing global demand for fuel has created challenges in the supply of raw materials, positioning biomass derived from cocoa pod husk waste as an economically viable and environmentally sustainable energy alternative. Methods: This study evaluated the effect of different binder types on the calorific value of briquettes produced from fermented cocoa pod husk waste in the Peruvian Amazon. For the calorific value assay, 1.05 kg of fermented cocoa pod husk waste was combined with 100 g of starch-based binders derived from corn, cassava, or potato, all sourced from the San Martín region. Statistical analyses were performed in R Studio using the dplyr package, and mean comparisons were conducted with Tukey's HSD test (p < 0.05). Results: The lowest ash content was obtained with the potato-starch binder (7.03%), whereas the highest value was recorded in the control treatment without binder (8.71%). Fixed carbon content ranged from 3.70% to 5.97% across treatments. The lowest calorific value was observed with the corn-starch binder (3,486.0 kcal/kg), while the highest was achieved with cassava starch (3,586.66 kcal/kg). Discussion: These findings demonstrate the technical feasibility of producing high-quality charcoal briquettes from cocoa pod husk waste using starch-based binders, providing a sustainable alternative to conventional fuels.
Challenges of organic amendments: Impact of vermicompost leachate and biochar on popcorn maize in saline soil
(MDPI, 2025-07-19) Rivas Aratoma, Brenda; Pérez Porras, Wendy Elizabeth; Ortiz Dongo, Luis Felipe; Arévalo Aranda, Yuri Gandhi; Solórzano Acosta, Richard Andi
Organic amendments provide a sustainable strategy to enhance soil quality in degraded environments while also helping to reduce greenhouse gas emissions, for example, by improving soil structure, minimizing the use of synthetic fertilizers, and promoting a green economy. This study assessed the comparative effects of two organic amendments— vermicompost leachate and biochar—on the performance of popcorn maize (Zea mays L. var. everta) cultivated in saline soil conditions. Four treatments were evaluated: T0 (Control), T1 (Vermicompost leachate), T2 (Biochar), and T3 (Vermicompost leachate + Biochar), each with 10 replicates arranged in a Completely Randomized Design (CRD). Although various soil physicochemical, microbiological, and agronomic parameters displayed no significant differences compared to the control, the application of biochar resulted in considerable improvements in soil total organic carbon, the microbial community (mesophilic aerobic bacteria, molds, and yeasts), and increased seed length and diameter. In contrast, vermicompost leachate alone negatively impacted plant growth, leading to decreases in leaf area, stem thickness, and grain yield. Specifically, grain yield declined by 46% with leachate alone and by 31% when combined with biochar, compared to the control. These findings emphasize the superior effectiveness of biochar over vermicompost leachate as a soil amendment under saline conditions and highlight the potential risks of widely applying compost teas in stressed soils. It is recommended to conduct site-specific assessments and screenings for phytotoxins and phytopathogens prior to use. Additionally, the combined application of leachate and biochar may not be advisable given the tested soil characteristics.
Challenges of organic amendments: Impact of vermicompost leachate and biochar on popcorn maize in saline soil
(Preprints.org, 2025-05-09) Rivas, Brenda; Pérez Porras, Wendy Elizabeth; Ortiz Dongo, Luis Felipe; Arévalo Aranda, Yuri Gandhi; Solórzano Acosta, Richard Andi
Organic amendments offer a sustainable strategy to enhance soil quality in degraded environments, while also contribute to reducing greenhouse gas generation and implementing a green economy. This study evaluated the comparative effects of two organic amendments— vermicompost leachate and biochar—on the performance of Popcorn maize (Zea mays L. var. everta) grown under saline soil conditions. Four treatments were tested: T0 (Control), T1 (Vermicompost leachate), T2 (Biochar), and T3 (Vermicompost leachate + Biochar), each with 10 replicates arranged in a Completely Random Design (CRD). Although several soil physicochemical, microbiological, and agronomic parameters showed no significant differences compared to the control, biochar application led to notable improvements in soil total organic carbon, microbial community (mesophilic aerobes bacteria, molds, and yeasts), and increased seed length and diameter. In contrast, vermicompost leachate alone had a detrimental effect on plant growth, including reduced leaf area, stem thickness, and grain yield. Notably, grain yield declined by 46% with leachate alone and by 31% when combined with biochar, compared to the control. These results highlight the superior performance of biochar over vermicompost leachate as a soil amendment under saline conditions and underscore the potential risks of broadly applying compost teas in stressed soils. Site-specific assessments and screening for phytotoxins and phytopathogens are recommended before use. Furthermore, the combined use of leachate and biochar may not be advisable under the tested soil characteristics.
Proposal for Bioenergy Territorial Planning in LATAM; Part 1/2: Circular Economy Model, Urban Component Using Household Biomass
(Presentación en el congreso: Creando soluciones para un futuro sostenible: emprendimiento basado en tecnología” - del 2 al 4 de diciembre de 2024, 2024-12-04) Gómez Montoya, Juan Pablo; Ortiz Dongo, Luis Felipe; Silva, Fernando; Peñalva , Jhon Jhonathan; Arrieta Gonzales, Carlos; Luna DelRisco, Mario
The research is divided into two articles, presenting a bioenergy territorial planning proposal for LATAM. The first part focuses on an urban circular economy (CE) model using household organic municipal waste based on source separation. The second part is related to a proposal for designing internal combustion engines for renewable and alternative gaseous fuels. This paper quantifies the bioenergy potential that could be generated for LATAM by using national population censuses-based on scientific formulation and AI-powered databases to estimate the amount of biofertilizers, biogas, and green hydrogen that can be obtained according to the proposed CE model. The sustainability of the CE model is analyzed through a thermo-economic assessment, social impact, and environmental impact, with carbon footprint measurement using a standardized calculator. Additional considerations, risk analysis, and challenges for the model's implementation are also presented to promote its widespread adoption.