Abstract
Anaerobic Digestion of Wheat Straw Pretreated with Soaking in Water and Alkali Medium
Highlights
Using renewable sources for bioenergy production is increasingly frequent nowadays
The efficiency of hydrolysis of straw biomass at 25 °C with a low NaOH concentration of 0.2% (0.05M) for 22 hours was confirmed by the increase of Chemical oxygen demand (COD) and pH values measured in the hydrolysates (Table 3.)
In the case of the wheat straw pretreated by soaking in distilled water, a slight increase of pH and high COD value after hydrolysis were observed
Summary
Using renewable sources for bioenergy production is increasingly frequent nowadays. It is caused by a growing demand for energy and the need to decrease the greenhouse gases emission generated by burning fossil fuels, which are the predominant energy source around the world, supplying 85% of the primary energy in 2018 [SRWE, 2019]. Using the biomass as the energy source has a great advantage over the fossil fuels, among which the renewability is the most important, because it allows balancing the CO2 emission generated during fuels combustion by absorption of CO2 into biomass via photosynthesis. The important advantage of biomass is a low acquisition cost, but low energy density in the case of the majority of biomass types is a significant limiting factor.
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