Examinando por Materia "Circular economy"

Mostrando 1 - 2 de 2

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.