Greenhouse gas emissions from organic waste composting

Sánchez, Antoni; Artola, Adriana; Font, Xavier; Gea, Teresa; Barrena, Raquel; Gabriel, David; Sánchez-Monedero, Miguel Á.; Roig, A.; Cayuela, María Luz; Mondini, Claudio

doi:10.1007/s10311-015-0507-5

Cited by 120 publications

(72 citation statements)

References 100 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biochars were highly alkaline, with pH ranging from 9.46 to 10.41 in SSB and RSB, respectively. Biochars prepared at low temperatures generally are neutral to slightly alkaline 6,32 , but in our case, all biochars prepared from animal manures and crop straws had higher pH as compared to the reported previously, same results were observed by Revell et al 29 . The pyrolysis process distils the volatile and acidic compounds producing the biooil or biogas, keeping alkaline components in biomass.…”

Section: Characteristic Animal Manuressupporting

confidence: 89%

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Sarfaraz

Silva

Drescher

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Renewing carbon and re-establishing it again in the soil is one of the valuable means to cope with climate change. there are many technologies for carbon apprehension and storage, but the most important one gaining attention is biochar technology. So, to carbonize and return different biological materials back to the farmland, a comprehensive study was proposed to characterize and evaluate the carbon (C) mineralization of biochars produced from different animal manures and crop straws. Six types of biochars were prepared from animal manures (poultry litter, swine and cattle manures) and crop straws (rice, soybean, and corn straws). the biochars were analyzed for chemical characteristics (elemental variables, thermal decomposition, cation exchange capacity, pH, electrical conductivity, specific surface area, and surface functional groups) and an incubation experiment was conducted to evaluate C mineralization from soil biochar mixture. Biochars produced from crop straws resulted to have more c as compared to the biochars produced from animal manures. concentration of nitrogen was low, while P, K, Ca, and Mg were found reasonably higher in all biochars except swine manure biochar. the plant-derived biochars presented lower co 2 emissions when incorporated to soil at 1 and 2% of C. Varying but all the biochars prepared represented an alkaline pH. Biochars prepared from the crop straws resulted to have more c, alkaline in nature, high cec, low co 2 emissions, can sequester C and more suitable to enhance the soil fertility in comparison to biochars produced from other sources. In the Southern region of Brazil can be found immense amounts of diverse animal manure and plant residues as the region have a massive number of animal farms and crop production. Swine and poultry farms are the principal sources of the manure produced in the region. Rice is cultivated on about 1,000 M ha area 1 , while soybean and corn are also major crops grown in the region (more than 6,000 M ha area) 2. In the region, no-tillage planting system is used to grow crops for a long time, and crop straws are left on the surface at the time of harvesting. There may be noted an uneven decomposition of these organic materials and different environmental impacts can be noticed, such as releasing carbon dioxide (CO 2) into the atmosphere and N can be immobilized by microorganisms or can be escaped into the atmosphere in the form of N 2 O, N 2 and NH 3. Biochar is an alternative and beneficial strategy to dispose-off the animal manures and plant residues rather than keeping them on the place or applying to soil directly 3. Biochar is a solid C rich material obtained from organic waste burning in the absence or low supply of oxygen 4. A massive amount of different biomasses can be found to produce biochars such as animal manures, plant residues, sewage sludge, and agricultural wastes. Its production from different residues and wastes for the use of farm soils may be a valuable means to decrease the negative impacts of emissions (greenhouse gases) from the...

show abstract

Section: Characteristic Animal Manuressupporting

confidence: 89%

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Sarfaraz

Silva

Drescher

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Esto se corrobora con el número de publicaciones relacionadas con el análisis de ciclo de vida-ACV de los biorresiduos (8 publicaciones) y con los estudios enfocados en minimizar las emisiones de compuestos orgánicos volátiles (8 publicaciones), líneas que han llamado la atención debido a la generación de olores, emisiones gaseosas e incidencia de las variables fisicoquímicas sobre el proceso [42][43][44].…”

Section: Tendencias Investigativas En Compostaje De Biorresiduosunclassified

“…En contraste, pocos estudios han considerado el efecto conjunto del ajuste de diferentes parámetros (i.e. aireación, relación C/N, humedad) que ayuden a comprender la dinámica del proceso con una mayor aproximación [42][43][44]. El desarrollo de este tipo de investigaciones, soportados en estudios cinéticos del proceso y en la incorporación de herramientas como las redes neuronales o algoritmos genéticos, pueden contribuir a la construcción de modelos empíricos que describan el comportamiento del proceso, predecir calidad del producto y definir las condiciones operacionales más adecuadas.…”

Section: Algunas Reflexiones Sobre Las Tendencias Del Proceso De Compunclassified

Compostaje de biorresiduos: Tendencias de investigación y pertinencia en países en desarrollo

Soto-Paz¹,

Oviedo-Ocaña

Torres–Lozada³

et al. 2017

DYNA

View full text Add to dashboard Cite

Biowaste is the main fraction of MSW in developing countries. Composting is a promising alternative for the management of biowaste in these contexts. However, its implementation has not been effective in developing countries, for which it is necessary to explore options to improve its application in this context. This article reviewed the research trends on biowaste composting and the potential application in developing countries such as Colombia. For this purpose, the technology monitoring methodology was used in databases of specialized scientific journals (period 2006 to 2017), using bibliometric tools such as RefViz® and Tlab®. The research has focused on optimizing the process through measures such as the use of amendment or support materials, strategies for reducing nitrogen losses, aerobic biodegradability studies and the development of empirical models to predict process conditions. The integration of this research in the context of developing countries can contribute to improve the application of biowaste composting.Keywords: Resource recovery; biowastes; composting; product quality; modeling. Compostaje de biorresiduos: Tendencias de investigación y pertinencia en países en desarrolloResumen Los biorresiduos son la mayor fracción de los Residuos Sólidos Municipales-RSM en países en desarrollo, siendo el compostaje una alternativa promisoria para su gestión. La implementación del compostaje en este contexto no ha sido efectiva requiriéndose estrategias para mejorar su aplicación. Este artículo analiza tendencias investigativas del compostaje de biorresiduos y presenta una reflexión crítica al respecto. Para tal efecto, emplea elementos de vigilancia tecnológica, analizando revistas científicas especializadas (periodo 2006 a 2017) y usando herramientas bibliométricas como RefViz® y Tlab®. Las investigaciones para optimizar el proceso se han enfocado en el uso de materiales de enmienda o de soporte, estrategias para la reducción en las pérdidas de nitrógeno, desarrollo de estudios de biodegradabilidad aerobia y de modelos empíricos para predecir condiciones del proceso. La integración de estas investigaciones en el contexto de países en desarrollo puede contribuir al mejoramiento de la aplicación del compostaje de biorresiduos.Palabras clave: Aprovechamiento; biorresiduos; compostaje; calidad del producto; modelado.

show abstract

“…However, hydrochar production and its application to soil, instead of its immediate combustion, will have a triple contribution to climate change mitigation. First, choosing HTC as waste management technology avoids emission of the powerful greenhouse gas methane during composting or uncontrolled decomposition 14,15 . Second, avoiding combustion of hydrochar after a short period of time and applying it to soil, removes the carbon dioxide from the atmosphere for a longer period of time, i.e., it consists in real carbon capture and storage (CCS) 16,17 .…”

Section: Introductionmentioning

confidence: 99%

Transformation of Organic Household Leftovers into a Peat Substitute

Hernández-Soto

Hernández-Latorre²,

Oliver-Tomas

et al. 2019

JoVE

View full text Add to dashboard Cite

A two-step procedure is described for the synthesis of a carbon material with a similar composition and properties as peat. The produced hydrochar is made suitable for agricultural applications by removing plant growing inhibitory substances. Wet household waste such as fruit peel, coffee grounds, inedible vegetable parts, or wet lignocellulosic material in general, are treated in presence of water at 215 °C and 21 bar in an autoclave, i.e., by hydrothermal carbonization. All these leftovers have a considerable water content of up to 90 weight % (wt%). Adding water extends the procedure to drier materials such as nutshells or even garden prunings and compostable polymers, i.e., the plastic bag for collection of the leftovers. Usually, the resulting carbon material, called hydrochar, produces a negative effect on plant growth when added to soil. It is supposed that this effect is caused by adsorbed phytotoxic compounds. A simple post-treatment under inert atmosphere (absence of oxygen) at 275 °C removes these substances. Therefore, the raw hydrochar is placed on a glass frit of a vertical tubular quartz reactor. A nitrogen gas flow is applied in down-flow direction. The tube is heated to the desired temperature by means of a heating mantle for up to one hour. The success of the thermal treatment is easily quantified by thermogravimetry (TG), carried out in air. A weight loss is determined when the temperature of 275 °C is reached, since volatile content is desorbed. Its amount is reduced in the final material, in comparison to the untreated hydrochar. The two-step treatment converts household leftovers, including compostable bags employed for their collection, into a carbon material that may serve as plant growth promoter and, at the same time, as a carbon sink for climate change mitigation.

show abstract

Greenhouse gas emissions from organic waste composting

Cited by 120 publications

References 100 publications

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Compostaje de biorresiduos: Tendencias de investigación y pertinencia en países en desarrollo

Transformation of Organic Household Leftovers into a Peat Substitute

Contact Info

Product

Resources

About