Application of rice husk charcoal on remediation of acid soil
About 1 million tons of waste rice husk are generated in Taiwan each year. Rice husk has high concentrations of nutrients, such as silicon and potassium. However, it is not decomposed easily because it contains over 70％ of cellulose and lignin and hence it is not suitable to be added into soil. In this study, a large quantity of rice husk is carbonized by vertical type continuous carbonization furnace without the presence of oxygen. After it is carbonized, it becomes rice husk charcoal (RHC) and vinegar (RHV). We have found that the addition of RHC carbonized at 600 and 700℃ to soil can increase the soil’s concentrations of calcium, magnesium, potassium and silicon as well as its pH value (i.e., lowering its acidity level). Therefore, RHC is a great soil modifier because it can lower the soil’s acidity and increase the soil’s nutrients. According to our experiments, the pH values of the mixtures in different ratios exhibited an increasing and steady of final condition in the 80-day period. The reason was that the CEC (cation exchange capacity) of the mixtures were increased, the specific surface areas of the mixtures increased and the mixtures’ acidity levels were lowered. Therefore, the incorporation of RHC in the soil would benefit the soil on a long-term basis.
rice husk as waste vertical type continuous furnace rice husk charcoal and rice husk vinegar
Chuan-Chi Chien Ying-Pin Huang Jy-Gau Sah Wen-Jie Cheng Ru-Yan Chang Yueh-Shih Lu
ITRI South, Industrial Technology Research Institute, Rm. 611 , No. 8, Gongyan Rd., Liujia Dist.,Tai Dept. of Environ. Eng. & Sci., National Pingtung University of Science and Technology, 1, Hsiuh FuRo ITRI South, Industrial Technology Research Institute, Rm. 611 , No. 8, Gongyan Rd., Liujia Dist., Ta
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
169-180
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）