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Pollutants removal from synthetic wastewater by the combined electrochemical, adsorption and sequencing batch reactor (SBR)
Ecotoxicology and Environmental Safety ( IF 6.8 ) Pub Date : 2018-06-05 , DOI: 10.1016/j.ecoenv.2018.05.053
Amin Mojiri , Akiyoshi Ohashi , Noriatsu Ozaki , Tomonori Kindaichi

Wastewater filtration is considered the main solution to water shortages. Here, we treated synthetic wastewater by combining treatment techniques, namely, electrochemical oxidation and adsorbent added sequencing batch reactor (SBR). One beaker with a working value of 1500 mL was applied in this contemporary study. In the upper part of the beaker, an anode and a cathode (Ti/RuO2-IrO2) were arranged in parallel for the electrochemical oxidation process. Sodium sulfate (Na2SO4) with a concentration of 2.5 g/L was added as the electrolyte. The voltage and current were set to 7.50 V and 0.40 A, respectively. Aeration was conducted at the bottom of the beaker. Then, 15% working value of the reactor was filled by activated sludge, and 85% working value of the reactor was added with synthetic wastewater. In addition, 1.50 g/L of powdered cockleshell was added in the reactor. Response surface methodology was used for statistical analysis. In synthetic wastewater, concentrations of COD, ammonia, phenols and chromium were 2500 mg/L, 2500 mg/L, 100 mg/L and 100 mg/L, respectively. pH and reaction time (h) were considered as independent factors. A total of 2430 mg/L biochemical oxygen demand, 2500 mg/L ammonia, 90.0 mg/L phenols, and 84.0 mg/L chromium were eliminated at the optimum reaction time (72.9 min) and pH (6.5). The energy consumption value was 6.5 (kWh kg−1) at the optimum operating conditions. This study indicated that this combined treatment system exhibited high performance.



中文翻译:

组合的电化学,吸附和测序间歇反应器(SBR)从合成废水中去除污染物

废水过滤被认为是解决水资源短缺的主要方法。在这里,我们通过结合处理技术,即电化学氧化和添加吸附剂的顺序分批反应器(SBR)来处理合成废水。在这项当代研究中使用了一个工作值为1500毫升的烧杯。在烧杯的上部,阳极和阴极(Ti / RuO 2 -IrO 2)平行布置用于电化学氧化过程。硫酸钠(Na 2 SO 4加入浓度为2.5 g / L的电解液)。电压和电流分别设置为7.50 V和0.40A。在烧杯的底部进行曝气。然后,用活性污泥填充反应器的15%的工作值,并且向反应器的85%的工作值中添加合成废水。另外,在反应器中添加1.50g / L的粉状海藻壳。响应面方法用于统计分析。在合成废水中,化学需氧量,氨,酚和铬的浓度分别为2500 mg / L,2500 mg / L,100 mg / L和100 mg / L。pH和反应时间(h)被认为是独立的因素。在最佳反应时间(72.9分钟)和pH值(6.5)下,共消除了2430 mg / L的生化需氧量,2500 mg / L的氨,90.0 mg / L的苯酚和84.0 mg / L的铬。-1)在最佳操作条件下。该研究表明该组合处理系统表现出高性能。

更新日期:2018-06-05
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