Carbon sequestration in soil from paddy straw derived biochar in India

2022 International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE) Pub Date : 2022-10-26 DOI:10.1109/ICUE55325.2022.10113534

Abhijeet Anand, Ravi Kumar, Vivek Kumar, P. Kaushal

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Abstract

The present research aimed to quantify the environmental benefits of the paddy straw - biochar system for carbon sequestration in India. The estimates showed that 135.5 ±1 MT of gross paddy straw is annually produced in the country, of which 41 ±1.1 MT is burned in-situ. In-situ burning of paddy straw releases 47,336±680 Gg pollutants having a 71.7 ±1.1 MT CO2e environmental footprint. Biochar conversion has been considered an alternative to the in-situ burning of paddy straw and estimated that 16.8±0.5 MT of biochar could be produced from available paddy straw. Biochar application in paddy fields could sequestrate 66.2±1.2 MT CO2e carbon, reduce 62,798±18,624 T NPK fertilizer consumption & 0.63±0.12 MT N2O & CH4 emissions and increase 0.6±0.14 MT CO2 emissions from paddy cultivation. paddy straw collection, field transportation, biochar conversion, material handling and spreading would impart a 21.9±0.8 MT CO2e environmental footprint. Overall, biochar conversion of paddy straw and its application in soil for carbon sequestration could reduce 135.6±4.5 MT CO2e environmental footprint from paddy cultivation which is about 6 % of annual GHG emission from India in 2019. The results of the present study would help develop an environment-friendly and sustainable management system for paddy straw in the country.

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印度水稻秸秆生物炭在土壤中的固碳作用

本研究旨在量化印度水稻秸秆-生物炭固碳系统的环境效益。估算显示，全国年生产总秸秆135.5±1 MT，其中就地焚烧41±1.1 MT。秸秆原位燃烧释放47,336±680 Gg污染物，产生71.7±1.1 MT CO2e环境足迹。生物炭转化被认为是水稻秸秆就地燃烧的一种替代方案，估计从可用的水稻秸秆中可以生产16.8±0.5 MT的生物炭。水田施用生物炭可固碳66.2±1.2 MT CO2e碳，减少62798±18624 T氮磷钾肥料消耗和0.63±0.12 MT N2O和CH4排放，增加0.6±0.14 MT CO2排放。稻田秸秆收集、田间运输、生物炭转化、物料处理和铺展将产生21.9±0.8 MT的二氧化碳当量环境足迹。总体而言，水稻秸秆的生物炭转化及其在土壤中的固碳应用可减少水稻种植产生的135.6±4.5 MT二氧化碳当量的环境足迹，约占印度2019年温室气体年排放量的6%。本研究的结果将有助于在该国建立一个环境友好和可持续的水稻秸秆管理系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE)

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