Assessment of greenhouse gas emission reduction of rice straw open burning alternative methods in some selected areas in Vietnam

Abstract

Rice straw open burning has been quite popular in Vietnam and caused pollution and greenhouse gases emission. There have been several alternative methods to replace the open burning including rice-straw composting, rice-straw fermented for cattle feed, straw mushroom production and models of in-field microbiological decomposing straw. This study aims to investigate GHG reduction of the straw open burning alternative models in Vietnam, including An Giang, Ninh Binh and Dong Nai provinces. Results showed that, the models contribute to reducing GHG emissions in selected communes in Chau Thanh district, Khanh Thanh, Song Ray communes including 64.3, 328.1, 45.1 tons, respectively. If the research results of the models are replicated, GHG emissions in Khanh Thanh, Song Ray communes can be reduced by 3,065.9, 3,635.6 tons/year, respectively. The potentials for GHG emission reduction in 2022 in Chau Thanh, Yen Khanh, Cam My districts are 2,644.2, 8,772.6, 821.8tons/year, respectively. Those in An Giang, Ninh Binh, Dong Nai provinces are 5,530.5, 112,885.1, 56,140.0 tons/year, respectively. By 2030, the potentials for GHG emission reduction in Chau Thanh, Yen Khanh, Cam My districts will be 13,098.9, 14,474.8, 1,355.9 tons/ year, respectively. Those in An Giang, Ninh Binh, Dong Nai provinces will be 27,358.6, 56,410.9, 26,853.1 tons/year, respectively.