Simultaneous degradation of ciprofloxacin, amoxicillin, sulfathiazole and sulfamethazine, and disinfection of hospital effluent after biological treatment via photo-Fenton process under ultraviolet germicidal irradiation

Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing In recent years combined chemical-biological wastewater treatment processes have received increasing interest. In the present study wastewater from soil remediation processes were treated by means of 1-step processes like Fenton, aerobic degradation and 2-steps combined method. The effluents resulting from soil remediation processes consist of high surfactant concentration solutions, mobilized oils and oil-in-water (o/w) emulsions. The effectiveness of wastewater treatment was evaluated by COD reduction and surfactant removal. The application of Fenton process alone showed around 80% of COD and surfactant removal, and in case of aerobic process only 60% of COD and 50% of surfactant removal was accomplished. However, the maximum COD reduction and surfactant removal from wastewater samples, above 90%, was obtained in aerobic degradation with Fenton process as pretreatment. Thus, the Fenton process could be effectively applied as a pretreatment step to improve the reduction of both COD and surfactant from wastewater resulting from soil remediation.

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Degradation of Matured Landfill Leachate by Electro Fenton Treatment and Optimization by Response Surface Methodology

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.8.16842 ◽

2018 ◽

Vol 7 (3.8) ◽

pp. 101

Author(s):

Minimol Pieus T ◽

Soloman P.A

Keyword(s):

Landfill Leachate ◽

Biological Treatment ◽

Solid Waste Management ◽

Electrochemical Treatment ◽

Ammonia Nitrogen ◽

Fenton Process ◽

The Earth ◽

Novel Approach ◽

The World ◽

Optimum Working

The landfill is the most widely utilized approach for solid waste management over the world. The fluid side-effect of the procedure, leachate, is a genuine danger to the earth. The ordinary biological treatment of matured landfill leachate is restricted by the presence of toxic contaminants and recalcitrant organics. A novel approach for management of landfill leachate by Electro Fenton process is researched here for the technical feasibility. The experimental outcome demonstrated that there was extensive reduction in COD-78.2%, Ammonia nitrogen-42.0%, Chloride-63.5%, Sulfate-60.0%, Sulfide-57.3%, and Phosphate-62.4% at the optimum working state of pH-2.85, Current density-140.5 A/m2, H2O2 dosage- 53% of theoretical value, Reaction time-44min. The biodegradability index was enhanced from 0.21 to 0.43 because of the treatment. The examination not just uncovers the likelihood of degradation of contaminants by giving a mild electrochemical treatment additionally extends the possibility of utilizing the approach as a compelling pretreatment for its biological treatment.

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Degradation of an organophosphorus insecticide in aqueous medium by Electro-Fenton process

Acta periodica technologica ◽

10.2298/apt2152063a ◽

2021 ◽

pp. 63-72

Author(s):

Mirvet Assassi ◽

Farid Madjene ◽

Abdeltif Amrane

Keyword(s):

Biological Treatment ◽

Supporting Electrolyte ◽

Operating Conditions ◽

Organophosphorus Insecticide ◽

Current Intensity ◽

Fenton Process ◽

Factors Affecting ◽

Incomplete Removal ◽

Temperature Solution ◽

Major Factors

This work proposes the remediation of toxic and/or refractory pollutants, such as the organophosphorus insecticide (Phosmet) which cannot be completely degraded by conventional methods like biological treatment, adsorption, flocculation, electro-flocculation, reverse osmosis, ultrafiltration, coagulation. However, these techniques have some disadvantages such as incomplete removal, therefore, the Electro-Fenton process was used. The major factors affecting the removal of Phosmet, namely the current intensity, catalyst concentration (Fe3+), temperature solution, nature of the electrolytes and oxygenation duration of the solution were studied in this work. The optimal operating conditions appeared to be: current intensity 200 mA, 0.5 mmol L-1 of Fe3+, T= 20?C, pH =3 using Na2SO4 (50 mmol L-1) as supporting electrolyte and an oxygen supply throughout all the experiments (120 min). Under these optimal conditions, the removal efficiency of the phosmet was 88%.

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Metronidazole removal by means of a combined system coupling an electro-Fenton process and a conventional biological treatment: By-products monitoring and performance enhancement

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2018.07.006 ◽

2018 ◽

Vol 359 ◽

pp. 85-95 ◽

Cited By ~ 21

Author(s):

Arwa Aboudalle ◽

Hayet Djelal ◽

Florence Fourcade ◽

Lionel Domergue ◽

Aymen Amin Assadi ◽

...

Keyword(s):

Biological Treatment ◽

Performance Enhancement ◽

Fenton Process ◽

Combined System ◽

And Performance ◽

System Coupling ◽

By Products

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Photo-Fenton processes assisted by solar light used as preliminary step to biological treatment applied to winery wastewaters

Water Science & Technology ◽

10.2166/wst.2007.476 ◽

2007 ◽

Vol 56 (2) ◽

pp. 89-94 ◽

Cited By ~ 11

Author(s):

R. Mosteo ◽

M.P. Ormad ◽

J.L. Ovelleiro

Keyword(s):

Organic Matter ◽

Activated Sludge ◽

Biological Treatment ◽

Research Work ◽

Biological Processes ◽

Activated Sludge Process ◽

Fenton Process ◽

Organic Matter Concentration ◽

Pre Treatment ◽

Matter Concentration

Winery wastewaters are difficult to treat by conventional biological processes, because they are seasonal and experience substantial flow variations. Photocatalytic advanced oxidation is a promising technology for wastewaters containing high amounts of organic matter. In this research work, solar assisted photo-Fenton processes of both heterogeneous and homogeneous phase are used in the pre-treatment of winery wastewaters. The results of these experiments have confirmed the suitability of the photo-Fenton processes, due to these treatments achieving purification levels of up to 50% (measured as total organic carbon). The intermediate effluents are treated adequately by aerobic biological treatment (activated sludge process), due to the decrease in organic matter concentration present in winery wastewaters. The possibility of a combined photo-Fenton process, based on the use of sunlight, and aerobic biological treatment (activated sludge) is suggested.

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