Energy intensified integrated advanced oxidation technology for the treatment of recalcitrant industrial wastewater
Energy intensified integrated advanced oxidation technology for the treatment of recalcitrant industrial wastewater
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DOI：
10.1016/j.jclepro.2018.09.234
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发表时间：
2019-01
影响因子：
11.1
通讯作者：
A. Buthiyappan;A. Raman
中科院分区：
文献类型：
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作者：
A. Buthiyappan;A. Raman
这项工作的目的是提供额外的信息和知识的可能性，以克服传统的高级氧化工艺（AOPs）通过杂交的限制。本研究比较了直接光解（UV）、UV/H_2O_2光解（UV/H_2O_2）、UV辅助混凝（UV单键Fe ~（2+）混凝）、芬顿法、Fe ~（2+）混凝和光-芬顿法等光化学和非光化学高级氧化法处理真实的纺织废水的可行性。蜡染业是马来西亚的一个家庭纺织业，据报告，它的污染物，主要是染料，在环境安全处置方面存在问题。比较了化学需氧量（COD）、总有机碳（TOC）和脱色率以及耗电量。其中，光-芬顿氧化法的COD去除率最高（91.2%），其次是芬顿氧化法（81.4%）、UV/H_2O_2法（68.0%）、UV-Fe ~（2+）混凝法（55.0%）、Fe ~（2+）混凝法（43.0%）和UV光解法（10.0%）。在最佳操作条件下（室温，未稀释污染物），光-Fenton复合工艺实现了完全脱色，COD（91.2%）和TOC（78.5%）去除率较高，与其他高级氧化工艺相比，每级最小电能为0.02 kWhr/m3。与传统的芬顿法相比，芬顿法与紫外辐射相结合可使总化学成本降低约13%，降解率提高约10%。GC/MS分析表明，光Fenton法成功地去除了87%的有机化合物。污泥的粒度分布特性研究证明，芬顿产生的污泥达到质量适合处置。光-芬顿是最便宜的选择，具有最高的去除率（91%），因为与花费0.0021美元的芬顿相比，其降解1 g COD仅需要0.0016美元。因此，本研究的结论是，光-Fenton法是一种经济可行的和适当的处理方法，提高可生化性的柠檬酸类污染物。
This work aimed at providing additional information and knowledge on the possibility to overcome the limitation of conventional advanced oxidation processes (AOPs) through hybridization. In the present work, a number of photochemical and non-photochemical AOPs such as direct photolysis (UV), photolysis of hydrogen peroxide using UV light (UV/H2O2), UV assisted coagulation (UVsingle bond Fe2+coagulation), Fenton process, Fe2+coagulation and photo-Fenton process were compared to determine their feasibility to treat real textile wastewater. The Batik industry, which is a textile cottage industry in Malaysia has reported problems related to safe environmental disposal of its pollutants, mainly dyestuff. The comparison was made in terms of Chemical oxygen demand (COD), Total organic carbon (TOC) and colour removal together with electricity consumption. Among the processes evaluated, the highest COD removal was achieved for photo -Fenton oxidation (91.2%), followed by Fenton oxidation (81.4%), UV/H2O2(68.0%), UV- Fe2+coagulation (55.0%), Fe2+coagulation (43.0%) and UV photolysis (10.0%). At the optimal operating conditions (room temperature, undiluted contaminants), the photo-Fenton hybrid process achieved complete decolourization and higher removal of COD (91.2%) and TOC (78.5%) with minimum electrical energy per order of 0.02 kWhr/m3compared to other AOPs. About 13% reduction in the total chemical cost and 10% increase in the degradation were observed by combining the Fenton process with UV radiation compared to the conventional Fenton process. The GC/MS analysis revealed that the photo-Fenton process successfully removed 87% of organic compounds. The sludge characterization studies by Particle Size Distribution proved that the Fenton-generated sludge achieved quality suitable for disposal. Photo-Fenton is the cheapest option with highest removal (91%) as its required only $0.0016 to degrade 1 g of COD compared to Fenton which cost $0.0021. Therefore, this study concluded that the photo-Fenton process was an economically viable and appropriate treatment method for enhancing biodegradability of recalcitrant contaminants.