Effect of pyrolysis temperatures on major nutrients and some physical and chemical properties in biochar produced from different biosourcesPantnagar Journal of Research, Volume - 19, Issue - 2 ( May-August, 2021)
PDF Views - 182 | Downloads - 100
The effect of different pyrolysis temperatures was examined on the major nutrient composition, nutrient ratios and some physico-chemical properties of biochars produced from pine needles, lantana and wheat straw. An increase in pyrolysis temperature increased the concentrations of C and K in all biochars except in wheat straw biochar wherein a decrease in C was noticed with an increase in pyrolysis temperature from 450 degree C to 550 degree C. Phosphorus concentration in wheat and pine needle biochars increased significantly with the increase in pyrolysis temperature from 300 to 450 degree C and further increase from 450 to 550 degree C decreased P concentration in wheat straw and pine needle biochar but an exactly opposite trend was noted for the C:P ratio. Both the pH and electrical conductivity of biochar increased with increase in pyrolysis temperature, however, increase in temperature from 450 to 550 degree C decreased pH of Lantana biochar and electrical conductivity of lantana and wheat straw biochar. Considering the concentrations of major nutrients and physicochemical properties of plant-based biochar, a pyrolysis temperature of 450 degree C appeared to be optimum for biochar production. Among different feedstocks, biochar produced from pine needles had the highest N content while the one derived from wheat straw had the highest P and K content.
Download Full PDF