Comparative analysis of nutrients composition in biochar produced from different feedstocks at varying pyrolysis temperature

Authors : İfeoluwa OMOTADE, Samuel MOMOH, Bolaji OLUWAFEMİ, Ebenezer AGBOOLA

Pages : 64-70

Doi:10.35208/ert.747833

View : 19 | Download : 8

Publication Date : 2020-06-30

Article Type : Research Paper

Abstract :Biochar has proved to be effective in improving soil fertility and it is important to know its nutrients variability as influenced by pyrolysis temperature and feedstock type for optimum agricultural productivity. In this experiment four different feedstocks from animal and plant sources were selected and pyrolysed at four different temperatures of 300, 400, 500 and 600 ˚C for 3 hours at a heating rate of 10 ˚C min -1 . The feedstocks were Corn cob insert ignore into journalissuearticles values(CC);, Poultry litter insert ignore into journalissuearticles values(PL);, Cow dung insert ignore into journalissuearticles values(CD); and Peanut shell insert ignore into journalissuearticles values(PS);. The results show that increase in pyrolysis temperature led to decrease in the concentration of many of the parameters analysed in the biochar. At the lowest temperature of 300 ˚C the highest contents of insert ignore into journalissuearticles values(0.62 %); N in CD, insert ignore into journalissuearticles values(66.4 mg g -1 ); P in CC, insert ignore into journalissuearticles values(8.38 mg g -1 ); K in CD, insert ignore into journalissuearticles values(16.2 mg g -1 ); Ca in CC, insert ignore into journalissuearticles values(4 21 mg g -1 ); Mg in CC, insert ignore into journalissuearticles values(0.28 %); S in CC, were observed. On the other hand, increase in temperature resulted to increase in C, pH, Ash content and the highest pH value of 10.17 was found in CD. From this study, it can be deduced that feedstocks from animal source shows a high range of nutrient when compared to feedstocks from plant source and likewise increase in temperatures led to decrease in some essential nutrient needed by plant for growth and stability in the soil.
Keywords : Biochar, pyrolysis, temperature, feedstock, nutrients