Dairy wastewater treatment using an electrochemical method: Experimental and statistical study

Davarnejad, Reza; Nikseresht, Mehrazin

doi:10.1016/j.jelechem.2016.06.016

Cited by 45 publications

(23 citation statements)

References 36 publications

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“…Davarnejad and Nikseresht [106] studied the possibility to treat a wastewater from dairy agro-industry performing an electro-Fenton process using iron electrode. The authors applied an experimental design using five independent variables (reaction time, current density, pH, volumetric ratio of H 2 O 2 /DW and H 2 O 2 /Fe 2+ molar ratio) with three level full factorial BBD to achieve the best operational conditions for a maximum COD removal.…”

Section: Electrochemical Oxidationmentioning

confidence: 99%

Application of Advanced Oxidation Processes for the Treatment of Recalcitrant Agro-Industrial Wastewater: A Review

Amor

Marchão

Lucas

et al. 2019

Water

184

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Agro-industrial wastewaters are characterized by the presence of multiple organic and inorganic contaminants of environmental concern. The high pollutant load, the large volumes produced, and the seasonal variability makes the treatment of these wastewaters an environmental challenge. A wide range of wastewater treatment processes are available, however the continuous search for cost-effective treatment methods is necessary to comply with the legal limits of release in sewer systems and/or in natural waters. This review presents a state-of-the-art of the application of advanced oxidation processes (AOPs) to some worldwide generated agro-industrial wastewaters, such as olive mill, winery and pulp mill wastewaters. Studies carried out just with AOPs or combined with physico-chemical or biological treatments were included in this review. The main remarks and factors affecting the treatment efficiency such as chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total organic carbon (TOC), and total polyphenols removal are discussed. From all the studies, the combination of processes led to better treatment efficiencies, regardless the wastewater type or its physico-chemical characteristics.

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Section: Electrochemical Oxidationmentioning

confidence: 99%

Application of Advanced Oxidation Processes for the Treatment of Recalcitrant Agro-Industrial Wastewater: A Review

Amor

Marchão

Lucas

et al. 2019

Water

184

View full text Add to dashboard Cite

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“…In the current research, Design Expert software (version: 7) was applied to minimize the number of runs. Then, Box–Behnken design (BBD) under response surface methodology (RSM) with a low‐order polynomial equation was used to optimize the operating conditions (Davarnejad & Azizi, ; Davarnejad & Nikseresht, ; Davarnejad, Zangene, Fazlali, & Behfar, ). 46 and 54 experiments were, respectively, designed for EF and PEF processes, and the goal was to maximize COD removal.…”

Section: Methodsmentioning

confidence: 99%

Pharmaceutical wastewater treatment using UV‐enhanced electro‐Fenton process: Comparative study

Behfar

Davarnejad

2019

Water Environment Research

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In this research, treatment of a pharmaceutical wastewater (PhW) obtained from a factory by electro-Fenton (EF) and photoelectro-Fenton (PEF) processes was investigated. The effects of several parameters involving pH, current density, H 2 O 2 /Fe 2+ molar ratio, volume ratio of H 2 O 2 /PhW, UVA light, and time were studied. The experiments were designed by Design Expert software, and response surface methodology (RSM) was applied to determine the optimum conditions for the highest COD removal. According to the analysis of variance (ANOVA), time was the most significant parameter on the process response (COD removal) followed by current density. The optimal conditions for 86.85% of COD removal through the EF process were at pH of 2.96, current density of 42.90 mA/cm 2 , H 2 O 2 /Fe 2+ molar ratio of 3.78, volume ratio of H 2 O 2 /PhW of 1.37 ml/L, and reaction time of 58.49 min, while the optimal conditions for 93.00% of COD removal through PEF process were at pH of 2.91, current density of 43.71 mA/cm 2 , H 2 O 2 /Fe 2+ molar ratio of 4.29, volume ratio of H 2 O 2 /PhW of 1.67 ml/L, UVA light of 6 W, and reaction time of 54.24 min. It was concluded that UVA light can increase the COD removal through PEF process around 7% more than that of the EF process at optimum conditions. • Practitioner points• Treatment of a pharmaceutical wastewater by EF and PEF processes was investigated. • Effects of several parameters were entirely studied on both the processes. • RSM was applied to determine optimum conditions for the highest COD removal for both the processes. • UVA light increased COD removal through PEF process (around 7%) at the optimum conditions.

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“…The maximum absorption occurred at a wavelength of 348 nm. Therefore, all of the samples were analyzed at this wavelength and the oil concentration was determined according to standard methods . The oil removal was calculated by the following equation:

true normalOil normal normalremoval normal (%) = (1 - \frac{C_{0}}{C_{i}}) \times 100

…”

Section: Methodsmentioning

confidence: 99%

Study on Soybean Oil Plant Wastewater Treatment Using the Electro‐Fenton Technique

et al. 2019

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Due to its low viscosity, soybean oil is commonly used as edible oil. Its production is accompanied by a large amount of wastewater containing hazardous materials like phenolic compounds. In this study, the electro‐Fenton process with response surface methodology was applied for oil removal from wastewater of soybean oil plants. Five independent variables, including reaction time, pH, current density, molar ratio of H2O2 to Fe2+, and volume fraction of H2O2 to wastewater, were investigated for their effects on oil removal. The significant independent variables were optimized by the Box‐Behnken design. The optimum conditions were statistically obtained, and the results were confirmed by experiment. 92.66 % oil removal were experimentally found for the optimum conditions.

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Dairy wastewater treatment using an electrochemical method: Experimental and statistical study

Cited by 45 publications

References 36 publications

Application of Advanced Oxidation Processes for the Treatment of Recalcitrant Agro-Industrial Wastewater: A Review

Application of Advanced Oxidation Processes for the Treatment of Recalcitrant Agro-Industrial Wastewater: A Review

Pharmaceutical wastewater treatment using UV‐enhanced electro‐Fenton process: Comparative study

Study on Soybean Oil Plant Wastewater Treatment Using the Electro‐Fenton Technique

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