【作者】 栾富波；

【导师】 李善评；

【作者基本信息】 山东大学 ， 环境工程， 2006， 硕士

【摘要】 难降解有机废水的危害性大，传统的废水处理方法往往难以处理这类废水。从经济和技术角度考虑，开发利用新的预处理技术，提高难降解有机废水的可生化性，再经过传统的生化工艺处理是治理这类废水的有效方法。本研究选取电解作为难降解有机废水的预处理方法，去除有毒有害的有机物，提高废水可生化性，同时降低废水COD浓度，为进一步的生化处理创造条件，为难降解有机废水的处理探索新的处理方法。 对二氧化铅阳极制备工艺进行了研究，确定了制备二氧化铅阳极的适宜条件；通过掺杂Ni、La、Bi氧化物对二氧化铅阳极进行了改性，以提高电解效率和电流效率，试验表明Ni氧化物掺杂效果最好，La氧化物掺杂效果次之，Bi氧化物掺杂效果最差。 对气体扩散阴极的制备工艺进行了研究，确定了制备气体扩散阴极的适宜条件；极化曲线和扫描电镜的表征分析说明造孔剂在电极内形成的大量气孔和曝气提供的足够溶解氧形成过氧化氢是电极性能提高的主要原因。 将掺Ni二氧化铅阳极和气体扩散阴极协同作用应用于预处理难降解的酸性嫩黄2G废水、印染废水和焦化废水中，使电解过程中的“两极氧化”同时进行。试验结果表明：经电解预处理后，三种废水在COD降低的同时，可生化性得到了明显的改善，说明电解法是预处理难降解有机废水的有效方法，可以为后续生化处理创造良好的条件。论文采用改性二氧化铅阳极和气体扩散阴极协同作用预处理难降解有机废水，为难降解有机废水的处理工艺提供了一种新的途径。更多还原

【Abstract】 Refractory organic wastewater is harmful and it is hardly treated directly by the conventional wastewater treatment methods. Consider from economy and technology, new pretreatment techniques should be developed to improve biodegradability of that wastewater, and then it is treated by the conventional methods. Electrolytic method was studied for the refractory organic wastewater pretreatment to reduce COD value and improve biodegradability of wastewater in this paper.Preparation technology of PbO₂ anode was studied, and optimal condition was determined. PbO₂ anode was modified by oxides of Ni or by La or by Bi respectively in order to improve efficiency of electrolysis. The result of experiment shows that Ni-doped electrode is better than others.Preparation technology of gas diffusion cathode was studied, and optimal condition was determined. Polarization curves and scanning electron microscope show that large quantities of gas cavities formed by pore-forming material and enough dissolved oxygen formed by aeration can create H₂O₂, which is the main reason that improvement of electrode performance.Applying Ni-doped PbO₂ anode and gas diffusion cathode work together to pretreat acidic light yellow, dyeing and coking wastewater. The result of experiment shows that the COD value of three wastewaters reduced and at the same time the biodegradability increased after the electrolytic pretreatment which create a well condition for latter biological process. Using modified PbO₂ anode and gas diffusion cathode to pretreat refractory organic wastewater provided a new way to treat that wastewater.更多还原