Treatment of Municipal Activated Sludge by Ultrasound-Fenton Process

Santos, Carolina; Jorge, Nuno; Teixeira, Ana R.; Peres, José A.; Lucas, Marco S.

doi:10.3390/ecp2022-12666

Cited by 1 publication

(1 citation statement)

References 14 publications

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“…In contrast, in the current study, increasing the reaction time beyond 20 minutes will decrease the COD removal rate, which is an unpredicted result consistent with a small number of previous findings [59][60][61]. Yosofi and Mousavi [62] attributed that the decrease of RB5 removal rate happened when the concentration of H2O2 elevated to 400 mg/l due to the consumption of OH• radicals by extra hydrogen peroxide at high concentration instead of reacting with RB5 Eqs.…”

Section: Effect Of Operating Factors On the Sono-fenton Processsupporting

confidence: 88%

Treatment of Petroleum Refinery Wastewater by Sono Fenton Process Utilizing the in-Situ Generated Hydrogen Peroxide

Jiad¹,

Abbar²

2023

alkej

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Combining ultrasonic irradiation and the Fenton process as a sono-Fenton process, the chemical oxygen demand (COD) in refinery wastewater was successfully eliminated using response surface methodology (RSM) with central composite design (CCD). The impact of two main influential operational parameters (iron dosage and reaction time) on the COD removal from wastewater generated by an Iraqi petroleum refinery facility was explored. Removal of 85.81% was attained under the optimal conditions of 21 minutes and 0.289 mM of concentration. Additionally, the results revealed that the concentration of has the highest effect on the COD elimination, followed by reaction time. The high R2 value (96.40%) validated the strong fit of the model equation and the successful adopting RSM in the treatment of wastewaters from petroleum refineries. Furthermore, a comparison among sono-Fenton, sono-Fenton with addition of externally, classical Fenton and sonolysis processes showed that the combined process of sono-Fenton is better than individual processes and the external addition of .

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