【作者】 邢向军；

【导师】 周集体；

【作者基本信息】 大连理工大学 ， 环境工程， 2005， 硕士

【摘要】 本文通过对国内外焦化废水处理技术的综述以及对北钢集团焦化厂废水处理中存在的问题的分析和试验研究,表明在焦化废水生化处理系统的基础上,采用复极性三维电极技术能够有效的对其进行深度处理。考虑到实验室现有的试验条件,选择了固定床和流化床两种结构,其中固定床考察了石墨板做阴、阳电极,流化床考察了圆筒石墨做阳极、铁棒做阴极和石墨板分别作阴、阳极三种情况。 本次试验采用大化集团化肥厂焦化车间生化处理系统出水为研究对象,以处理后水质达到国家一级标准（GB13456-1996）为研究目标;考虑A-A/O法出水中酚、氰和氨氮能够达到一级标准,因而本研究中主要考察对COD_cr的去除效果。 本课题采用单因素法对复极性三维电极技术进行了研究,考察了槽电压、反应时间、液体催化剂量、pH值、气量和活性炭量等不同因素对COD_cr去除率的影响,并对该技术进行了经济分析,最终提出适宜的操作参数。其主要结论如下: 1)焦化废水生物脱氮的A-A/O工艺较成熟,在我国的焦化行业已得到广泛的应用,如工艺参数设计合理,工艺条件控制适当,可取得较好的脱氮效果,是目前工程设计中优先考虑的脱氮工艺。但COD_cr去除效果不理想,大多停留在二级排放标准或甚至更低,很难达到一级标准。 2)通过对这三种反应器进行实验,结果表明,复极性三维电极技术能够有效去除焦化外排水中的有机污染物。通过控制合理的槽电压、反应时间、pH值、液体催化剂量等因素,可以在较低运行成本下,取得较好的COD_cr去除率。 3)在A-A/O基础上结合复极性三维电极技术,能够在不增加过多投资和运行成本情况下,使外排水达到一级排放标准,非常适合作为焦化厂现有生化处理系统的改造技术。更多还原

【Abstract】 The experimental results showed that bipolar three-dimensional electrode process was efficient in CODcr reductions. Considering the technical and economical feasibilities, the two structure, fixed bed and fluidized bed, were selected as experimental set-up. And graphite electrode and pontil electrode were used in the experiment. The efficiency of removing CODcr was mainly studied.In the experiment, various influencing factors such as cell voltage, react time, quantities of liquid catalyst, pH, quantities of gas and quantities of activated carbon were examined, and the technological parameters were obtained. The results were shown as follows:A-A/O process is firstly considered in coking wastewater treatmnet which has a better effects on the wastewater containing high concentration of NH3-N. But the removal efficiency of CODcr was low.It is practicable to treat coke-plant wastewater by bipolar three-dimensional electrode process. By controling appropriate factors, a higher removal efficiency of CODcr can be obtained with low cost.After treated by the bipolar three-dimensional electrode process and A-A/O process, the quality of cleaned water can attain the national discharge standard of grade one.更多还原