Characterization of poultry and swine manure-derived biochar as affected by pyrolysis temperature

• Published in: Zhejiang da xue xue bao. Journal of Zhejiang University. Sciences edition. Li xue ban Vol. 41; no. 2; pp. 185 - 190
• Main Authors: Wang, Lihua, Lin, Qi
• Format: Journal Article
• Language: Chinese
• Published: Zhejiang University Press 01.03.2014
• Subjects: Ashes; Calcium; Functional groups; Manure; Poultry; Pyrolysis; Soils; Swine; 傅里叶变换红外光谱; 物理化学性质; 猪粪; 生物质炭; 鸡粪
• ISSN: 1008-9497
• DOI: 10.3785/j.issn.1008-9497.2014.02.013

Biochar application to soils is being considered as a means to sequester carbon (C) while concurrently improve soil functions. In this study, the source materials including swine manure and poultry manure were pyrolysed in a temperature-controlled muffle furnace at the temperature of 200, 300, 400, 500, 700 degree C and the physicochemical properties such as yield, ash content, pH, functional groups and mineral contents were studied. The results showed that the yields of biochars decreased and the ash contents increased with the increase of pyrolysis temperature. Swine manure had relatively high yields (59.2%~92.7%) and ash contents (41.2%~70.6%) as compared to the poultry manure which had yields of 90.2%~39.8% and ash contents of 20.3%~48.1%. Both kinds of biochars are neutral or alkaline. The pH values of biochars were positively related to both total ash content and Calcium (Ca) content. The FTIR showed that the oxygen functional groups of biochars prepared at the lower temperatures ( less than or equal to