Implications of regional N2O–N emission factors on sugarcane ethanol emissions and granted decarbonization certificates

Carvalho, João Luís Nunes; Oliveira, Bruna Gonçalves de; Cantarella, Heitor; Chagas, Mateus Ferreira; Gonzaga, Leandro Carolino; Lourenço, Késia Silva; Bordonal, Ricardo O.; Bonomi, Antonio

doi:10.1016/j.rser.2021.111423

Cited by 31 publications

(14 citation statements)

References 53 publications

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“…The RenovaBio Program presents itself as a promising and innovative policy in many aspects (biofuels demand planning and boosting energy security in Brazil), in which every single biorefinery in the country will pursue the production of biofuels with an ever-higher environmental responsibility [8] . The characteristics of each country's energy matrix, based on fossil fuels or renewable sources as found in Brazil [37] , with average carbon emission intensity of 0.08735 Mg CO 2 MWh -1 from years 2011 to 2018 as reference [37] , will determine the potential for each country to develop and use straw-based bioenergy sources to reach a low-carbon energy matrix.…”

Section: Potential For Straw-based Bioenergy and Ghg Balance Of Energ...mentioning

confidence: 99%

“…Several acts and standards have been developed in different countries to impose stringent requirements on biofuel producers to confirm the environment-friendly characteristics of their products and their ability to effectively reduce GHG emissions in comparison with corresponding fossil fuels [8] . Towards this goal, the National Biofuel Policy, officially known as RenovaBio Program, was established under Law 13.576/2017 in Brazil.…”

Section: Introductionmentioning

confidence: 99%

“…The decarbonization certificates are an important mechanism to price and stimulate management practices that reduce GHG emissions [9] and should be supported by research results. However, the effectiveness of such mechanisms rests on the fact that the amount of CBios will be linked to the reduction in GHG emissions associated with the production of a given biofuel in comparison to its fossil competitor [8] , as investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

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Greenhouse gas emissions and offset potential from sugarcane straw for bioenergy production in Brazil

2023

Carbon Footprints

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This study aims to assess the additional Greenhouse gas (GHG) emissions affected by straw removal from the soil surface in sugarcane areas, including measurement of short-term soil CO 2 -C emissions plus emissions associated with the recovery and transport operations of straw bales until to the industry gate (diesel emissions) and estimated soil N 2 O emission, comparing with leaving all straw on the soil surface. Taking into account the main sources evaluated (soil CO 2 , diesel and N 2 O from straw), the total additional GHG emissions from the recovery of 6.9 Mg Dry Matter ha -1 (27%) was estimated at 1423 kg CO 2 eq ha -1 , resulting in a carbon footprint of 206.2 kg CO 2 eq per megagram (Mg) of straw recovered. Applying the parameters cited in this study for electricity generation (GHG emission and offset potential), our results showed an additional GHG emission of (+) 860 kg CO 2 eq ha -1 . Applying the same parameters for second generation (2G) ethanol production replacing gasoline, an avoided GHG emission of (-) 2316 kg CO 2 eq ha -1 could be achieved. The route of recovering 27% of sugarcane straw from the soil surface through bale system for bioelectricity production using the technical parameters and industrial efficiency rate of this case study resulted in a C footprint of 347 kg CO 2 eq MWh -1 . Improving the efficiency rate for straw conversion in bioelectricity based on its lower heating value could reduce its C footprint to 62.26 kg CO 2 eq MWh -1 produced. For sugarcane straw recovery at the first cutting cycle in clay soil,

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Section: Potential For Straw-based Bioenergy and Ghg Balance Of Energ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Greenhouse gas emissions and offset potential from sugarcane straw for bioenergy production in Brazil

2023

Carbon Footprints

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“…Carvalho et al evaluaron diferentes fuentes de fertilizantes de N (orgánicas, sintéticas y sus combinaciones) para cultivos de caña de azúcar, encontrando que el promedio de emisiones de N2O por N aplicado fue del 0.60%, lo que es 40% menor al factor de emisión (FE) estipulado por el IPCC (1%). Sin embargo, el promedio de emisiones de N2O por N aplicado, por combinación de fertilizante de nitrogenado, como nitrato de amonio, sulfato de amonio o urea, con VC (práctica común en Brasil) fue de 1.12%, con una gran variación (0.13-3.03%) (41) . Estas mayores emisiones de N2O asociadas a la aplicación de vinaza en los campos de caña de azúcar están probablemente relacionadas a la estimulación de los microbios del suelo con las cargas de carbono orgánico y nitrógeno que aumentan la actividad microbiana con el incremento de los nitrificantes y las comunidades heterótrofas disminuyendo así, la disponibilidad de oxígeno y potenciando la producción de N2O (37) .…”

Section: Fertirrigaciónunclassified

Desafíos y oportunidades de la Vinaza de caña de azúcar. Un análisis bibliométrico.

León

Manotas-Duque²,

Malule

2022

inycomp

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La vinaza de caña de azúcar (VC) es el principal subproducto de la producción de bioetanol. Esta se considera un potencial contaminante debido a su índice de acidez y a la presencia de componentes orgánicos, sólidos en suspensión y metales pesados. Los altos niveles de producción de VC son sin duda una amenaza para el ambiente y la comunidad en general. El objetivo de este estudio fue evaluar las principales disposiciones o tratamientos de VC, además de sus aplicaciones, empleando mapas bibliométricos para el análisis de metadatos. Se encontró que los principales focos de estudio con relación a la VC son: (i) digestión anaeróbica (DA), (ii) fertirrigación, (iii) coagulación/floculación, (iv) algas, microalgas y hongos, y (v) producción de hidrógeno. Adicionalmente, se determinó que el tratamiento más efectivo para VC fue la DA, alcanzando una eficiencia de 90% en la remoción de demanda química de oxígeno y una recuperación energética entre 85 y 95% como biogás. Finalmente, se abordaron los desafíos y oportunidades que enfrenta Latinoamérica con la creciente producción de VC, así como una revisión detallada de su tratamiento y/o disposición, incluyendo condiciones óptimas para la producción de productos de valor agregado.

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“…The 4R’s consist of the application of the right source of the nutrient, at the right rate, using the right application method, at the right time ( Bruulsema et al., 2009 ). These actions provide for agricultural crop (e.g., sugarcane) improvements in agronomic management worldwide, agreeing with environmental, social, and governance (ESG) policies ( Carvalho et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Fertilizer source and application method influence sugarcane production and nutritional status

Castro

Coelho²,

Castro³

et al. 2023

Front. Plant Sci.

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IntroductionThe contrasting weather conditions throughout the sugarcane harvest period in south-central Brazil (April to November) influence fertilization management in sugarcane ratoon.MethodsThrough field studies carried out over two cropping seasons, we aimed to compare the performance of sugarcane at sites harvested in the early and late periods of the harvest season as a function of fertilizer sources associated with application methods. The design used in each site was a randomized block in a 2 x 3 factorial scheme; the first factor consisted of fertilizer sources (solid and liquid), and the second factor consisted of application methods (above the straw, under the straw, and incorporated into the middle of the sugarcane row).ResultsThe fertilizer source and application method interacted at the site harvested in the early period of the sugarcane harvest season. Overall, the highest sugarcane stalk and sugar yields at this site were obtained with the incorporated application applying liquid fertilizer and under straw applying solid fertilizer, with increments of up to 33%. For the site harvested in the late period of the sugarcane harvest season, the liquid fertilizer promoted a 25% higher sugarcane stalk yield compared to the solid fertilizer in the crop season with low rainfall in the spring, while in the crop season with normal rainfall, there were no differences between treatments.DiscussionThis demonstrates the importance of defining fertilization management in sugarcane as a function of harvest time, thereby promoting greater sustainability in the production system

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Implications of regional N2O–N emission factors on sugarcane ethanol emissions and granted decarbonization certificates

Cited by 31 publications

References 53 publications

Greenhouse gas emissions and offset potential from sugarcane straw for bioenergy production in Brazil

Greenhouse gas emissions and offset potential from sugarcane straw for bioenergy production in Brazil

Desafíos y oportunidades de la Vinaza de caña de azúcar. Un análisis bibliométrico.

Fertilizer source and application method influence sugarcane production and nutritional status

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