A descriptive analysis of 416 documents was performed using bibliometric techniques, in order to gather existing knowledge in circular economy focusing on waste management (2007–2020). The results of this study indicate that annual scientific production increased 94% in the last 5 years, highlighting the countries of Italy, Spain, the UK, China, Brazil, and India. Between the most cited documents stand out those related to calorific value of municipal solid waste and waste to energy technologies for achieving circular economy systems. The conceptual analysis indicates strong linkage between circular economy and sustainable production, waste management, and recycling. Emerging research trends evolved from processes and industry-oriented approach (2017) toward waste management, recycling, and circular economy (2019) and sustainable development and urban solid waste (2020). The analysis reveals five dominant circular economy and waste research themes: (1) greenhouse gases; (2) circular economy, waste management, and recycling; (3) life cycle; (4) waste treatment; and (5) anaerobic digestion and recovery; trends research are related to policy interventions, and enforcement of authorities’ regulations to foster circular economy transition, increase the use of practices of recycling and reusing, as well as discourage a growing consumption culture. Results found denote the challenge represented by the implementation of comprehensive policies in circular economy. The above being a key alternative for green recovery in response to the current COVID-19 pandemic.
La apicultura en México es una actividad importante del subsector pecuario, su volumen de producción y nivel de productividad la ubican en el sexto lugar mundial; en América ocupa la tercera posición en ambos rubros y por sus exportaciones ocupa el tercer lugar. El objetivo es caracterizar las tendencias de la producción de miel, evaluar la productividad de su proceso de obtención y la inf luencia que ésta ejerce sobre la rentabilidad. La tendencia de la producción nacional de miel ha seguido de 1990 a 2012 un comportamiento hacia la baja con altibajos, su reducción general fue de 11.9%, asociado principalmente con la inf luencia de la africanización de las colonias, la varroasis y los huracanes; en lo particular, se encontró que los niveles de productividad por colmena, jornada laboral, kilogramo de azúcar empleado en la alimentación de las colonias y por cada mil pesos ($ 78.31 USD) de inversión en activos fue de 29.1, 14.6, 6.8 y 119.6 kg, respectivamente. Asimismo, se demostró que la productividad ejerce una menor inf luencia sobre la rentabilidad en comparación con el precio de venta de la miel y el de compra del azúcar, variable que ejerce la segunda mayor inf luencia sobre la utilidad obtenida.
A descriptive analysis of 416 documents was performed using bibliometric techniques, in order to gather existing knowledge in circular economy (CE) focusing on waste management (2007–2020). The results of this study indicate that annual scientific production increased 94% in the last five years; highlighting the countries of Italy, Spain, United Kingdom, China, Brazil and India. The conceptual analysis indicates strong linkage between CE and sustainable production, waste management and recycling. Emerging research trends evolved from processes and industry oriented approach (2017), towards waste management, recycling and circular economy (2019) and sustainable development and urban solid waste (2020). Through intellectual analysis, schools of thought were identified, where the most influential authors such as Wang, Ghisellini, Zhang and the European Commission with the greatest connection with other authors stand out. Results found denote the challenge represented by the implementation of comprehensive policies in CE, in addition to measure its contribution to sustainable development. The above, being a key alternative for green recovery in response to current COVID-19 pandemic.
Uno de los problemas que preocupa al hombre es el aprovechamiento, manejo y destino de los residuos orgánicos provenientes del quehacer diario. Muchos nutrientes esenciales que están en la materia orgánica (carbono, nitrógeno y fósforo) presentes en la naturaleza, experimentan transformaciones por medio de microorganismos y las enzimas que poseen les permiten mejorar la biodisponibilidad de sus nutrientes. Es importante conocer a profundidad procesos de biotransformación enzimática, lo cual permitiría darle un manejo y aprovechamiento a los residuos orgánicos. Existen diversos tipos de enzimas que permiten conocer su actividad en el proceso de compostaje. El objetivo de esta revisión fue presentar los principales componentes de los residuos lignocelulósicos y las enzimas que participan en su degradación para poder conocer la actividad metabólica que se lleva a cabo durante el compostaje. DOI: https://doi.org/10.54167/tch.v11i3.94
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