采用UV-A发光二极管光芬顿法和混凝絮凝法处理结晶水果废水。
Treatment of crystallized-fruit wastewater by UV-A LED photo-Fenton and coagulation-flocculation.
作者信息
Rodríguez-Chueca Jorge, Amor Carlos, Fernandes José R, Tavares Pedro B, Lucas Marco S, Peres José A
机构信息
Centro de Química de Vila Real, Departamento de Química, UTAD - Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal.
Departamento de Física, UTAD - Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; INESC-TEC, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal.
出版信息
Chemosphere. 2016 Feb;145:351-9. doi: 10.1016/j.chemosphere.2015.11.092. Epub 2015 Dec 12.
This work reports the treatment of crystallized-fruit effluents, characterized by a very low biodegradability (BOD5/COD <0.19), through the application of a UV-A LED photo-Fenton process. Firstly, a Box-Behnken design of Response Surface Methodology was applied to achieve the optimal conditions for the UV-A LED photo-Fenton process, trying to maximize the efficiency by saving chemicals and time. Under the optimal conditions ([H2O2] = 5459 mg/L; [Fe(3+)] = 286 mg/L; time >180 min), a COD removal of 45, 64 and 74% was achieved after 360 min, using an irradiance of 23, 70 and 85 W/m(2) respectively. Then a combination of UV-A LED photo-Fenton with coagulation-flocculation-decantation attained a higher COD removal (80%), as well as almost total removal of turbidity (99%) and total suspended solids (95%). Subsequent biodegradability of treated effluents increased, allowing the application of a biological treatment step after the photochemical/CFD with 85 W/m(2).
本研究报告了通过应用UV-A发光二极管光芬顿工艺处理结晶水果废水的情况，该废水具有极低的生物降解性（BOD5/COD <0.19）。首先，采用响应面法的Box-Behnken设计来实现UV-A发光二极管光芬顿工艺的最佳条件，试图通过节省化学药剂和时间来提高效率。在最佳条件下（[H2O2]=5459mg/L；[Fe(3+)]=286mg/L；时间>180分钟），分别使用23、70和85W/m(2)的辐照度，360分钟后COD去除率分别达到45%、64%和74%。然后，UV-A发光二极管光芬顿与混凝-絮凝-倾析相结合，实现了更高的COD去除率（80%），以及几乎完全去除浊度（99%）和总悬浮固体（95%）。处理后废水的后续生物降解性提高，使得在光化学/CFD处理后（85W/m(2)）可以进行生物处理步骤。
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