【作者】 李天成；

【导师】 李鑫钢；

【作者基本信息】 天津大学 ， 化学工程， 2003， 博士

【摘要】 电生物技术作为一项绿色高新技术在环境污染治理领域的应用已初见端倪，深入开展有关研究具有重要的理论和现实意义。针对污染严重的重金属有机废水，提出了全新电沉积-生物膜复合工艺进行综合治理，关键在于一是筛选高效功能菌，二是确定生物体系中最佳的电沉积电位。本文主要研究内容如下：培养与驯化后混合微生物TEM、SEM分析表明，不同于混合培养，驯化后微生物种群数量急剧减少，但适应性个体数量明显增加，且细胞结构，表面形态均发生了变化。同时，降解动力学实验也发现，尽管混合培养与驯化后微生物均能将葡萄糖降解到很低水平，但比降解速率曲线差异很大。对于重金属电沉积过程中的极化现象，从理论与实验两方面进行了探讨，并确定了不同金属的还原峰电位。采用新型复合工艺连续处理重金属有机废水，同时，与单一电沉积法和生物膜法对比发现，复合工艺具有更高的净化效果。生物膜形成过程一直是关注的焦点，本文运用离散-微分结合法进行了动态模拟，其形态特征如厚度、密度和表面粗糙性等以输出量形式反映出来，并研究了模型参数改变对生物膜结构的影响。最后，建立了电场强化重金属传递与生物膜吸附模型，并结合实验结果进行了验证。进而，探讨了电迁移速度、废水进口流速、重金属初始浓度对平衡吸附量的影响。更多还原

【Abstract】 Electro biotechnology as an environment-friendly technology shows potential values in the field of environment pollution treatment. It is necessary to carry out extensive research theoretically and practically.A novel combined process of micro electrolysis and biofilm is initially put forward and utilized to purify metal-laden organic wastewaters in this article. Two key factors to achieve this aim are to screen the qualified functional bacteria and determine the optimum electro deposition potential of metals on the premise of physiological and biochemical activity sustained. The main content in this article are as follows: TEM and SEM Analyses of mixed microbial cells show that: after acclimation by heavy metals or non-degradation organic substances, small sorts of mixed microbial are survived, and adaptable individuals are increased obviously. Moreover, their microstructure and morphological characteristics are changed greatly. Biodegradation kinetics indicates that glucose can be degraded to much lower levels by mixed microbial cells cultured or acclimated, but the curves of specific degrading rates are quite different.Polarization phenomena of metals electro deposition are studied in both theory and experiments, and the reductive peak potentials of metals are also determined. Continuous treatments of metal-bearing organic wastewaters by combined process were carried out in this article, and its purification efficiency is obviously prominent than that of sole electro deposition or biofilm processes. A combined method of discrete-differential is used to dynamically simulate biofilm formation and development in 2-D space, and the morphological characteristics of biofilm are output values of model. Further, the effects of model parameters on biofilm microstructure are investigated, too. A model of metal ions transfer and biofilm adsorption under direct-current electric field is established and tested with the experimental results. Moreover, the effects of electro migration velocity, initial concentrations of heavy metals and wastewaters maximum input velocity on the equilibrium adsorbance are also studied deeply.更多还原