Abstract
Biogas production from crops and their residues is widely used as feed because of its availability and high methane content due to its calorific value. The aim of this study is to estimate the response of cereal crops such as maize, sorghum, wheat, barley and rice to elevated temperature and his impact on biogas production by meta-analysis method. Studies show that increasing temperature by 1°C and 2°C respectively decreased biomass yield by -5% to -7% (wheat), -5% to -16% (rice), -7% to -12% (sorghum), -10% to -14% (maize) and -4% (barley). On the other hand, key element which determine the quality of the plant and which are negatively affect by elevated temperature are the basic elements for a good quality and quantity of biogas such as ( lipids, carbohydrates, micro and macro-element). If protein concentration increases under warming, decrease in grain is largely due to lower starch concentration under elevated temperature, -13 to -33% for barley, -2 to -33% for wheat and -2 to -6% for rice. Lipids also decrease under elevated temperature and some nutrients like Selenium (Se), Cobalt (Co) and Aluminum (Al) which decrease respectively by -43.5%, -15% and -22%. Based on these results, we can argued that biogas production from cereal crops is threatened in the future.
Highlights
Biogas production is a complex biochemical process that takes place in the absence of oxygen and in the presence of highly sensitive micro-organisms that are mainly bacteria
This study aims to elucidate the future of biogas production from crops under the rising of temperature
In the second part we show the important role of element that constitutes the quality of plant on biogas before to conclude on the effect of elevated temperature on biogas production from cereal crops
Summary
Biogas production is a complex biochemical process that takes place in the absence of oxygen and in the presence of highly sensitive micro-organisms that are mainly bacteria. Various form of biomass such as vegetation, animal dung and plant products are providing safe and convenient sources of energy as in the form of biogas and liquid fuel. Biomass such as cattle dung, agro-residues, plant residues, organic wastes from industrial processing in spite of being biodegradable, create much nuisance in the environment. These available alternative resources can be harnessed by anaerobic fermentation of this waste matter production biogas as efficient gaseous fuel [3]. In the second part we show the important role of element that constitutes the quality of plant on biogas before to conclude on the effect of elevated temperature on biogas production from cereal crops
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