吸附电解氧化法深度处理印染废水的研究

【作者】 夏志新；

【导师】 朱又春；

【作者基本信息】 广东工业大学 ， 环境工程， 2001， 硕士

【摘要】 本文研究了吸附电解氧化技术深度处理印染废水二级处理出水的工艺条件和作用机理，并对该技术应用于印染废水深度处理后出水回用于印染前工序进行了经济效益分析。 吸附电解氧化法采用表面涂有金属氧化物的钛网的形稳阳极，在形稳阳极上附着活性炭纤维吸附剂。吸附剂是影响吸附电解氧化处理效果的重要因素。通过测定不同型号的活性炭纤维的性能，选择比表面积大、碘吸附值和亚甲基蓝吸附值大的活性炭纤维（A-1型）作为试验用吸附剂。A-1型活性炭纤维的比表面积为1479m~2/g，亚甲基蓝吸附值为292mg/g，碘吸附值为1418mg/g。 印染废水经过生化处理后，其出水中仍含有极少量的染料、印染助剂和无机盐类，其水质远没有达到回用于印染工艺的要求。经分析，影响印染生化出水回用于前工序的主要是残余的染料和印染助剂。因此，本文首先以纺织印染工业常用的印染助剂壬基酚聚氧乙烯醚（Tx-10）和十二烷基苯磺酸钠（LAS）为研究对象，分别对其进行电解和吸附电解试验，探索吸附电解法对印染助剂废水的氧化降解规律。研究结果表明：（1）吸附能促进电解氧化的进行，电解时，阳极附着活性炭纤维吸附剂，可使COD_Cr去除效率提高56.6％；（2）电解可延长活性炭纤维的吸附平衡时间，使活性炭纤维的再生周期延长4倍。 本文还对广州某染织厂印染废水二级出水进行吸附电解深度处理试验，得出该工艺的合适工艺参数：电流强度：300mA，废水停留时间：10min，进水pH：6.5-7.0，活性炭纤维用量：1.2g。在该工艺条件下，出水能达到回用于前工序的用水要求。并对该工艺进行了经济效益分析，若该厂采用二级出水回用工艺，每年可节约用水60万吨，节省用水和处理废水费用141万元。 同时，本文也探讨了吸附电解氧化法的作用机理。在吸附电解过程中，吸附和电解是协同作用的。一方面，活性炭纤维吸附富集有机污染物，使得阳极电解产生的强氧化性物质和有机污染物接触，更有利于氧化进行；另一方面，电解对活性炭纤维具有再生功能，电解使活性炭纤维再生是一个吸附和再生同时进行的动 广东工业人学帧D：学位论义 一 态再生过程，山于电解作用，使活性炭纤维的运行周期延长。更多还原

【Abstract】 The technology and mechanism of advanced treating dyeing and printing treated wastewater by adsorption electrolysis method were studied in this paper, and analyzing economic benefits of adsorption electrolysis method application to dyeing and printing wastewater reuse. Adsorption electrolysis anode was dimensionally stable anode which activated carton fiber attaching on it. After measured activated carbon fiber adsorption capability parameters, activated carbon fiber A-i was selected from four kinds of ACF as experimental adsorbent The specific surface area, iodine adsorption value and methylene blue adsorption value of activated carbon fiber A-i were 1479m21g, 141 8mg/g and 292mg/g respectively. After biochemical treatment, the effluent of dyeing and printing treated wastewater still contained a little dyestuffs, auxiliaries and minerals. The water quality of effluent treated by biochemical method could not achieve to the requirement of dyeing and printing using water. Dyestuffs and auxiliaries were the main influence factors of effluent reusing to dyeing and printing pre-process. So, The treatment of dyeing and printing auxiliaries Tx-10 and LAS wastewater by electrolysis and adsorption electrolysis methods was studied to search for the decomposing law of dyeing and printing auxiliaries wastewater. The experiment result showed: (1) ACF adsorption could improve electrolysis oxidating organic pollutant. Compared with electrolysis oxidation method, adsorption electrolysis oxidation method with ACF attaching on anode could increase CODcr removal rate 56.6%; (2) electrolysis could prolong the adsorption balance time of ACF, and made the regeneration period prolonging 4 times. The experiment of adsorption electrolysis method treating dyeing and printing treated wastewater was studied. The suitable technology parameters were gained: current intensity: 300rnA, wastewater intention time: 10mm,, influent pH value: 6.5-7.0, activated carbon fiber using volume: 1.2g. The adsorption electrolysis effluent couldattain to water quality requirement of pre-process. The mechanism of adsorption electrolysis treatment technology was discussed in this paper. In adsorption electrolysis process, adsorption and electrolysis cooperated mutually. On one side, activated carbon fiber absorbed organic pollution material, it made organic pollution matter contacting with oxidant produced by anode electrolysis which could improve pollution matter removal rate, on the other side, anode electrolysis could regenerate activated carbon fiber and prolonged ACF regeneration period.更多还原