粘合剂生产工业废水的特征可在于源自高难降解有机污染物的高化学需氧量(COD)和高总悬浮固体(TSS)浓度。废水的可生化性低,废水质量不稳定。各种处理方法在这种表征的废水中具有有限的适用性。在这项研究中,研究了电化学过程的处理性能。由于不可能通过仅应用一种工艺来满足高难熔有机物含量的排放标准,在这项工作中研究了顺序电化学过程。在顺序过程的第一步中,使用Al电极的电凝法(EC)可以实现更好的性能。第二步,将电氧化(EO)和过氧化物凝聚(PC)工艺应用于EC废水。在EO中,Ti/MMO被选为最有效的阳极,而在PC中,Fe被用作阳极,石墨用作阴极。Box-Behnken设计用于优化EO和PC工艺的操作条件并获得数学模型方程。在EC过程中,77%COD,78.5%TSS,在最佳条件下(pH7.2,反应时间35min,和电流密度0.5mA/cm2)。随着EO和PC工艺应用于EC的流出物,68.5%COD,77%TSS,和83%的UV254去除率和77.5%的COD,87%TSS,UV254去除率为86.5%,分别。EC-EO和EC-PC工艺的比能耗分别为16.08kWh/kgCOD和15.06kWh/kgCOD,分别。考虑到处理目标和工艺操作成本,结论是,两种顺序电化学系统都可能是处理粘合剂生产工业废水的有前途的替代系统。
Adhesive production industry wastewater can be characterized by high chemical oxygen demand (COD) sourced from high refractory organic contaminants and high total suspended solids (TSS) concentration. Biodegradability of the wastewater is low and wastewater quality is unstable. Various treatment processes have limited applicability in such characterized wastewater. In this study, the treatment performance of electrochemical processes was investigated. Because it is not possible to meet the discharge standards by application of only one process for high refractory organic content, sequential electrochemical processes were studied in this work. In the first step of the sequential process, electrocoagulation (EC) using Al electrodes by which better performance was achieved was applied. In the second step, electrooxidation (EO) and peroxi-coagulation (PC) processes were applied to the EC effluent. In EO, Ti/MMO was selected as the most effective anode whereas in PC, Fe was used as the anode, and graphite was used as the cathode. Box-Behnken Design was applied to optimize the operating conditions of EO and PC processes and to obtain mathematical model equations. In the EC process, 77% COD, 78.5% TSS, and 85% UV254 removal efficiency were obtained under the optimum conditions (pH 7.2, reaction time 35 min, and current density 0.5 mA/cm2). With the EO and PC processes applied to the effluent of EC, 68.5% COD, 77% TSS, and 83% UV254 removal and 77.5% COD, 87% TSS, and 86.5% UV254 removal were obtained, respectively. The specific energy consumption of EC-EO and EC-PC processes was 16.08 kWh/kg COD and 15.06 kWh/kg COD, respectively. Considering the treatment targets and process operating costs, it was concluded that both sequential electrochemical systems could be promising alternative systems for the treatment of adhesive production industry wastewater.