Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

Biochar from biomass pyrolysis is a carbon-rich material that has been used to remove various contaminants and to sequestrate carbon in soil. Recently, the cultivated area of greenhouse crops increased and the emission of by-products also increased. So, we need technology to turn these by-products in to agricultural resources. In this study, facilities crop wastes (red pepper, paprika) was converted into biochars at different pyrolysis temperature of 200, 300, 400, 600 and pyrolysis time of 1, 2, 4 hour under limited oxygen condition. Produced biochars were investigate to evaluate its yield, chemical properties (pH, EC, TC, TN, TP, K, Ca, Mg, Na) and surface properties (surface structure and element composition). For the biochar pyrolyzed at a high temperature, the values of pH, EC, TC and surface pore size increased whereas the yield and O/C ratio decreased. Based on the research results, when manufacturing biochar using by-products of greenhouse crops, the optimum pyrolysis temperature was 300 - 400 degrees and the pyrolysis time was 1 - 2 hours.

Characteristics of surface and elemental compositions of red pepper and paprika wastes used in this study.