【作者】 王艳；

【导师】 胡筱敏；

【作者基本信息】 东北大学 ， 环境工程， 2014， 硕士

【摘要】 电凝聚技术作为最具发展潜力的水处理技术之一,具有处理效果好、二次污染少等优点,但也存在极板钝化、耗电量大等缺点。据相关理论,采用周期换向电源、多极板并联等方式可有效缓解极板钝化,提高处理效果,同时降低能耗,因此本研究采用多极板并联异步周期换向电凝聚法处理制药废水。采用多极板并联直流电凝聚技术处理黄连素模拟废水,调控反应条件,考察电流效率、处理效果和反应能耗情况,并进行反应机理分析；采用多极板并联同步/异步周期换向电凝聚法处理黄连素和盐酸金刚烷胺模拟废水,获得最佳反应条件；对多极板并联的直流电凝聚法、同步周期换向电凝聚法、异步周期换向电凝聚法进行对比分析。采用3种电凝聚技术处理COD浓度750mg/L的黄连素模拟废水,多极板并联直流电凝聚法对黄连素、COD去除率分别可达99.73%、92.21%,能耗4.813kW*h/(kgCOD)；多极板并联同步周期换向电凝聚法对黄连素、COD去除率分别可达99.56%、92.75%,能耗4.113kW*h/(kgCOD)；多极板并联异步周期换向电凝聚法对黄连素、COD去除率分别可达99.76%、93.45%,能耗3.694kW*h/(kgCOD)。采用2种电凝聚技术处理COD浓度800mg/L的盐酸金刚烷胺模拟废水,多极板并联同步周期换向电凝聚法对COD去除率可达87.46%；多极板并联异步周期换向电凝聚法对COD去除率可达89.54%。多极板并联同步/异步周期换向电凝聚法处理模拟制药废水研究表明：相同条件下,参与电解反应的极板数量对污染物处理效果有较大影响,当极板数从2个增加到8个时,COD去除率可从20%提高到90%以上。对比多极板并联下的直流电凝聚法、同步周期换向电凝聚法、异步周期换向电凝聚法对模拟制药废水的处理效果和能耗情况分析得出：多极板并联直流电凝聚法处理效果最低,单位能耗最高,且存在极板钝化行为和浓度极化现象；多极板并联同步周期换向电凝聚法处理效果略高于多极板并联直流电凝聚法；多极板并联异步周期换向电凝聚法处理模拟制药废水COD和污染物降解效果最好,处理时间最短,能耗最低,具有较高的实用价值。更多还原

【Abstract】 Electro-coagulation, known as one of the most promising water treatment technology, not only has been successfully applied for removing pollutants, but also can cause less secondary pollution. However, the plate passivation and large electric energy consumption limited the application of this technology. According to some related theoretical analysis, the application of periodic reversal power and paralleled multi-plates can effectively alleviate the passivation phenomenon, improve the removal efficiency, and reduce the energy consumption. Therefore, in this research, the paralleled multi-plates asynchronism periodically reversing electro-coagulation was adopted to treat simulated pharmaceutical wastewater.Based on the current efficiency, removal performance and energy consumption situation, the degradation mechanism and reaction conditions of paralleled multi-plates DC-electrocoagulation on treating Berberine simulated wastewater were studied. The optimum conditions of paralleled multi-plates synchronization/asynchronism periodically reversing electro-coagulation on treating Berberine and Amantadine Hydrochloride simulated wastewater were obtained through this research. The comparasion of different electrocoagulation methods were accomplished in the research.Three electrocoagulation methods were used to treat Berberine simulated wastewater in this research. With paralleled multi-plates DC-electrocoagulation method, Berberine and COD removal rate can reach 99.73%,92.21% respectively, unit electric energy consumption is 4.1813kW · h/(kgCOD). With paralleled multi-plates synchronization periodically reversing electro-coagulation method, Berberine and COD removal rate can reach 99.56%,92.75% respectively, unit energy consumption is 4.113 kW · h/(kgCOD). With paralleled multi-plates asynchronism periodically reversing electro-coagulation method, Berberine and COD removal rate can reach 99.76%,93.45% respectively, unit energy consumption is 3.694kW · h/(kgCOD). The treatment of Hydrochloride simulated wastewater with two different electro-coagulation methods shows diverse relust. With paralleled multi-plates synchronization periodically reversing electro-coagulation, the COD removal rate in Hydrochloride simulated wastewater can reach 87%, with paralleled multi-plates asynchronism periodically reversing electro-coagulation, the COD removal rate in Hydrochloride simulated wastewater can reach nearly 90%.The treatment of simulated pharmaceutical wastewater with paralleled multi-plates synchronization/asynchronism periodically reversing electro-coagulation shows that the number of plates has a great influence on COD removal efficiency. It was claimed that the plate number increased from 2 to 8, the COD removal rate can be improved from 20% to 90%.Studied on different electrocoagulation methods, the comparasion shows that the paralleled multi-plates DC-electrocoagulation has the lowest removal effect, the highest energy consumption, and the phenomena of plate passivation and concentration polarization. The removal effect of paralleled multi-plates synchronization periodically reversing electrocoagulation is slightly higer than that of paralleled multi-plates DC-electrocoagulation. The treatment of simulated pharmaceutical wastewater with paralleled multi-plates asynchronism periodically reversing electrocoagulation has the best degradation effect, the shortest processing time, and the lowest energy consumption.更多还原