玉米芯在常温下的水解动力学研究

The hydrolytic kinetic study of corn cob at room temperature

为解决可渗透反应墙固定化硫酸盐还原菌原位治理酸性矿井水的碳源问题,以玉米芯为材料,通过模拟废水条件下单因素实验,分析温度、质量浓度、pH值、时间等参数对玉米芯水解液中还原糖含量的影响.根据玉米芯水解实验数据建立了玉米芯水解动力学模型,产糖率CG=k1·(e-k1t-e-k2t)/(k2-k1),mg/g;确定了不同温度下还原糖生成速率以及降解速率常数;玉米芯水解活化能Ea为33 342.213kJ/mol;指前因子为3.068×105.说明玉米芯作为缓释碳源在中低温条件下易水解,为以玉米芯固定SRB方法治理酸性矿山废水提供了理论依据.

In order to solve the problem of carbon source released in in-situ treatment of acid mine drainage through sulphate-reducing bacteria immobilized in permeable reactive barrier. Effects of mass concentration, temperature, pH value and time on reducing sugar content in the corncob hydrolyzate were investigated by single-factor experiments using synthetic wastewater. The hydrolytic kinetic model of corncob was built based on the experimental data of the corncob and the sugar field was CG =k1·（e-k1t-e-k2t）/（k2-k1）,mg/g; the reducing sugar formation rate. degradation rate and degradation constant at various temperatures were determined. The hydrolysis activation energy of corncob Ea was 33 342. 213 kJ/mol and the pre-exponential factor was 3. 068× 105. These results illustrated that, as the sustainedrelease carbon source, corncob was easy to hydrolyze at room temperature, which provids theoretical basis for the treatment of acid mine drainage by sulphate-reducing bacteria.