Hospital wastewater treatment using integrated sono-photo-fenton process: Experimental design through RSM

IF 2.7 Q2 MULTIDISCIPLINARY SCIENCES
Meseret Endalew , Esayas Alemayehu , Perumal Asaithambi
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Abstract

The present study investigates the degradation capacity of hospital wastewater removal (chemical oxygen demand and phosphate) percentage using a hybrid process of sono-photo-Fenton (US/UV/Fenton) and evaluating the influence of reaction time, pH, hydrogen per oxide (H2O2), initial chemical oxygen demand (COD) and phosphate concentration, and discussed statistical models. This study examines the effect of four independent factors and their interactions on process response using a second order-polynomial model and a statistical experiment design with 48 runs for each experiment. The significance of (P < 0.0001) indicates the significance of the model and the interaction of variables on the response performance of COD and phosphate removal. The significance of the quadratic model equation was performed using value of R2 = 0.9988 and R2 = 0.9998 for COD and phosphate removal. The results showed a maximum removal percentage of 94.5 % for COD and 99.15 % for phosphate at a similar pH-9, reaction time-50 min, H2O2 -20 mg/L, and an initial COD concentration of -205 mg/L and phosphate concentration of -3.45 mg/L. In both experiments, pH is an important factor among the four independent factors (pH, time, H2O2, initial COD and phosphate concentration), which has the potential to directly impact the removal of COD and phosphate. On the other hand, compared to the initial COD, a superior elimination ratio was at low H2O2 (10 mg/L). The US/UV/Fenton process reduces the amount of ferrous ions exist in the treated water. The US/UV/Fenton process has generally produced encouraging outcomes, and as a result, regarded as a viable treatment method for hospital wastewater.

Abstract Image

综合声光fenton工艺处理医院废水:RSM实验设计
本研究考察了超声-光-Fenton (US/UV/Fenton)混合工艺对医院废水(化学需氧量和磷酸盐)百分比的降解能力,并评价了反应时间、pH、过氧化氢(H2O2)、初始化学需氧量(COD)和磷酸盐浓度的影响,并讨论了统计模型。本研究采用二阶多项式模型和统计实验设计,考察了四个独立因素及其相互作用对工艺反应的影响。(P <;0.0001)表示模型的显著性以及各变量对COD和磷酸盐去除响应性能的交互作用。采用R2 = 0.9988和R2 = 0.9998对COD和磷酸盐的去除率进行二次模型方程的显著性检验。结果表明,在pH-9、反应时间50 min、H2O2 -20 mg/L、初始COD浓度为-205 mg/L、磷酸盐浓度为-3.45 mg/L的条件下,COD和磷酸盐的最大去除率分别为94.5%和99.15%。在这两个实验中,pH是四个独立因素(pH、时间、H2O2、初始COD和磷酸盐浓度)中的重要因素,有可能直接影响COD和磷酸盐的去除率。另一方面,与初始COD相比,低H2O2 (10 mg/L)的去除率更高。US/UV/Fenton工艺降低了处理水中亚铁离子的含量。US/UV/Fenton工艺通常产生了令人鼓舞的结果,因此被认为是一种可行的医院废水处理方法。
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来源期刊
Scientific African
Scientific African Multidisciplinary-Multidisciplinary
CiteScore
5.60
自引率
3.40%
发文量
332
审稿时长
10 weeks
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