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Oxidative chemical pretreatment by piranha solution for enhanced methane yield of wheat straw:mechanism and kinetic study

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Waste Disposal and Sustainable Energy 2023年第3期5卷 351-366页

作者： nikita kanaujia Shalu Rawat Jiwan Singh Department of Environmental Science Babasaheb Bhimrao Ambedkar UniversityLucknow226025India

The present research work aims to explore the potency of piranha solutions at the best-optimized concentrations,i.e.,40%and 30%to reduce the recalcitrant and heterogeneous structure of wheat straw,and the treated wheat straw was denoted as WS40 and *** effect of pretreatment on wheat straw was determined by anaerobic digestion(AD)in a batch mode,followed by the analysis of soluble chemical oxygen demand(sCOD)and volatile fatty acids(VFAs).After pretreatment,the surface fibers shattered and detached,showing a distorted surface of wheat *** increase in the crystallinity of wheat straw after pretreatment was also observed due to the removal of amorphous cellulose and *** in methane yield was obtained on the 9th day,which was 103±6.92 and 99.33±0.57 mL/d for WS40 and WS30,*** water measurement revealed that the pretreatment of wheat straw minimized the hydrolysis period by 14 *** also improved the methane yield by 2.65(WS40)and 2.45(WS30)fold in comparison with the control which yielded 35.66 mL/d methane on the 23rd *** modified Gompertz model(MGM),logistic function model(LFM)and transference function model(TFM)adequately described the degradation process and explained the kinetic behavior of the cumulative methane *** the three models,MGM was found to fit best for the methane yield of WS40 and WS30.

关键词： Anaerobic digestion Wheat straw Oxidative pretreatment Piranha solution Methane

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