Study on the Impact Factors of COD Throughput in Corncob Extract

• 作者: CHENG Yong-bo HU E-ming WANG Qing-liang WANG Sha ZHANG Hong-can ZHANG Qi
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 玉米芯 影响因素 提取物 COD 吞吐量 质量浓度 最佳条件 提取时间
• 年，卷（期）: 2012,（8）
• 页码范围: 32-35
• 页数: 4页
• 分类号: X832

摘要

[Objective]The study aims to discuss the impact factors of COD (chemical oxygen demand) throughput in corncob extract. [Method] Firstly,as the variations of the mass concentration of corncob,temperature,time and pH,the throughput of COD in corncob extract were analyzed respectively. Afterwards,through the orthogonal test,the best conditions for extracting organic matter from corncob were determined. [Result]The single-factor tests showed that there was a linear relationship between the mass concentration of corncob and COD of corncob extract when the mass concentration of the corncob was lower than 50 g/L; COD of corncob extract was higher under acidic or alkaline conditions. The optimum conditions for extracting organic compounds from corncob were as follows: temperature was 35 ℃,mass concentration was 40 g/L, pH = 3, and extracting time was 3 hours; under this conditions,the mass of COD released from a unit mass of corncob reached 0.0562 g. [Conclusion]The research could decrease the treatment cost of wastewater from uranium mining in mines and make corncob more useful.