scholarly journals Extended Fenton's process: toward improving biodegradability of drilling wastewater

2019 ◽  
Vol 79 (9) ◽  
pp. 1790-1797
Author(s):  
Ran Ding ◽  
Yanming Wang ◽  
Xing Chen ◽  
Yingxin Gao ◽  
Min Yang
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Oxidation Process ◽  
Oxygen Demand ◽  
Fenton Oxidation ◽  
Oxidation Time ◽  
Drilling Mud ◽  
Molecular Weights ◽  
Toc Removal ◽  
Fenton Oxidation Process

Abstract In this study, an extended Fenton process was used to improve biodegradability of the waste drilling mud containing bio-refractory polymers. Variation of biodegradability and organics with different molecular weights with the oxidation time were investigated during the Fenton oxidation process. Although the residual total organic carbon (TOC) arrived at a stable level soon after oxidation reaction, organics with the lower molecular weight increased and its biodegradability was improved significantly in the extended oxidation process, which originated from decomposition of residual H2O2 catalyzed by transformation of the Fe3+/Fe2+ and organoradicals. Under the conditions that follow: pH 3.0, H2O2 500 mg L−1, Fe2+ 250 mg L−1, oxidation time 120 min, further TOC removal of 35.9% and biochemical oxygen demand and total organic carbon (BOD/TOC) ratio of 0.83 was achieved. At the biological test, a substantial increase in TOC degradation by biological treatment with extension of Fenton oxidation time was observed. Finally, more than 90% biological removal of the TOC was achieved for the 120 min oxidation treatment. The experimental results highlight that an extended process can be adopted to improve the biodegradability of wastewater by utilization of the slow reaction of hydrogen peroxide with Fe3+ and organoradicals.

scholarly journals Treatment of ultrahigh chemical oxygen demand chemical wastewater by Fenton oxidation

2021 ◽  
Vol 2109 (1) ◽  
pp. 012011
Author(s):  
Xingfu Xue
Keyword(s):  
Oxidation Process ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Fenton Oxidation ◽  
Molar Ratio ◽  
Chemical Plants ◽  
Clear Liquid ◽  
Second Stage ◽  
Optimum Ph ◽  
Fenton Oxidation Process

Abstract The article focuses on the Fenton oxidation process for the treatment of ultrahigh COD chemical wastewater from chemical plants. Optimum pH was determined as 2.0 and 10.0 for the first (oxidation) and second stage (coagulation) of the Fenton process, respectively. 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole tatio of H2O2 : Fe2+=10:1, adjust the pH of the solution to 10, after 1.5 hours of agitation, then add 5% PAM2ml to the solution, filtrate, extract, filtrate the clear liquid and dilute it three times, take 200ml of the diluted liquid, and add 0.465gFeSO4·7H2O, H2O2(30%)2ml, the mole tatio of H2O2 : Fe2+=10:1, adjust the pH of the solution to 10, after 1.5 hours of agitation, then add 5% PAM2ml to the solution, static stratification. For chemical wastewater, when the molar ratio H2O2/Fe2+ is 10:1, the removal rate of COD is the highest, provided 86.21–86.45% COD removal.

Study on Pretreatment of Dye Wastewater by Fenton Oxidation Process

2012 ◽  
Vol 627 ◽  
pp. 378-381
Author(s):  
Bi Rong Wang
Keyword(s):  
Reaction Time ◽  
Oxidation Process ◽  
Removal Rate ◽  
Fenton Oxidation ◽  
Dye Wastewater ◽  
Dyeing Wastewater ◽  
Reaction Conditions ◽  
Fenton Oxidation Process

Fenton pretreatment has been used for treating dye wastewater. The effects of the dos of H2O2 and FeSO4, reaction time and pH on the removal COD were investigated. It was found that, when the reaction conditions are as follows: COD 2850 mg/L dyeing wastewater, the dosage of H2O2 is 140mmol/L, FeSO4 17.02 mmol/L, pH 7.6, and reaction time 1.0 h, the CODcr of dye wastewater removal rate of up to 70%. Fenton pretreatment process of dye wastewater has a broad prospect.

Optimization of the operating parameters using RSM for the Fenton oxidation process and adsorption on vegetal carbon of MO solutions

2014 ◽  
Vol 20 (3) ◽  
pp. 848-857 ◽  
Author(s):  
Adriana Saldaña-Robles ◽  
Ricardo Guerra-Sánchez ◽  
Manuel I. Maldonado-Rubio ◽  
Juan M. Peralta-Hernández
Keyword(s):  
Oxidation Process ◽  
Fenton Oxidation ◽  
Operating Parameters ◽  
Fenton Oxidation Process

Pollutant removal and biodegradation assessment of tannery effluent treated by conventional Fenton oxidation process

2018 ◽  
Vol 6 (6) ◽  
pp. 7070-7079 ◽  
Author(s):  
Fernando H. Borba ◽  
Leandro Pellenz ◽  
Francine Bueno ◽  
Jonas Jean Inticher ◽  
Luana Braun ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Pollutant Removal ◽  
Fenton Oxidation ◽  
Tannery Effluent ◽  
Fenton Oxidation Process

scholarly journals The Treatment of IRN77/78 Resin Using Fenton Oxidation Process

2018 ◽  
Vol 392 ◽  
pp. 032042
Author(s):  
Wendong Feng ◽  
Jian Li ◽  
Shaoqing Jia ◽  
Yunhai Wang ◽  
Dunyi Ye
Keyword(s):  
Oxidation Process ◽  
Fenton Oxidation ◽  
Fenton Oxidation Process

scholarly journals One-step Oxidation of Total Organic Carbon, Total Nitrogen, and Total Phosphorous using Wet Chemical Oxidation

2020 ◽  
Vol 42 (12) ◽  
pp. 603-609
Author(s):  
Jeong-Hwan Choi ◽  
Dong-Hun Shin ◽  
Hye-Bin Kim ◽  
Jong-Gook Kim ◽  
Kitae Baek
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Total Nitrogen ◽  
Uv Irradiation ◽  
Oxidation Process ◽  
Irradiation Time ◽  
Suitable Condition ◽  
Chemical Oxidation ◽  
Total Phosphorous ◽  
Wet Chemical

Objective:This study proposed the simultaneous multi-oxidation of total organic carbon, total nitrogen, and total phosphorous using modified wet chemical oxidation method.Methods:The multi oxidation process was based on the dual radical system with sulfate and hydroxyl radicals. The sodium persulfate (Na2S2O8) and sodium hydroxide (NaOH) were activated at 40℃ and UV irradiation with 254 nm to generate the sulfate radical and hydroxyl radical. The organic matters were oxidized by the dual radicals, and TOC, TN, and TP values were compared with the control group.Results and Discussion:The dual radical system oxidized organic carbon to carbon dioxide effectively, and the TOC values were similar to the value obtained from the high-temperature combustion technique. However, the residual persulfate after oxidation process interfered the absorbance for TN and inhibit the complexation in TP measurement. The residual persulfate was effectively converted to sulfate by longer heating and UV irradiation, and the interferences were more sensitive to reaction temperature than UV irradiation time. As a result, a higher temperature condition was more effective and enhanced the applicability of multi-oxidation.Conclusions:The multi oxidation of TOC, TN, and TP was demonstrated by wet chemical oxidation, and the proposed method is expected to secure the sample and reduce the analytic time. However, the more suitable condition to enhance the accuracy of TOC, TN, and TP in the multi-oxidation system should be studied further.

scholarly journals Batch Electrocoagulation Treatment of Peat Water in Sarawak with Galvanized Iron Electrodes

2020 ◽  
Vol 997 ◽  
pp. 127-138
Author(s):  
Nazzeri Abdul Rahman ◽  
Nur Afifah Tomiran ◽  
Aiman Hakim Hashim
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Humic Acids ◽  
Current Density ◽  
Treatment Time ◽  
Oxygen Demand ◽  
Experimental Tests ◽  
Iron Electrodes ◽  
Filtration System ◽  
Standard Limit

Peat water is an abundant water resource in Sarawak where some of the coastal areas in Sarawak still utilize peat water for domestic usage. Peat water contains natural organic matters especially humic substances which include humic acids. Humic acids contribute to the brown color of peat water and can cause diseases such as stomach cancer, blackfoot disease and etc. if consumed by human. Electrocoagulation is an alternative to conventional water treatment methods which have the advantages of being environmental friendly, minimal sludge production and no addition of chemical substances. The aims of this study are to fabricate a desktop scale electrocoagulation system with galvanised iron electrodes and to investigate the effects of the operating parameters such as inter-electrode distance, applied current density, number of electrodes, and treatment time on peat water in the system. The performance of batch electrocoagulation system in term of their removal efficiency of several parameters such as total organic carbon (TOC), chemical oxygen demand (COD), color and turbidity are evaluated. Through experimental tests conducted, this system successfully removes 98.44% of COD, 92.02% of TOC, 97.92% of turbidity and 99.91% of color by using galvanized iron as an electrode at current density of 25 A/m2in 30 minutes with 10 galvanized iron electrodes. Despite the fact that there is a small amount of iron ions and zinc ions remained in the treated peat water which are 0.001mg/l and 0.0442mg/l respectively, these concentrations are far below the standard limits imposed by Malaysia Ministry of Health (MOH). Generally, all the parameters studied meet the standard limit imposed by MOH except for total organic carbon. This is particularly due to the improper filtration system adopted in this study. The total operating costs for 252 in 30 minutes treatment time of 10 electrode plates is RM 8.75 per . Overall, the study have successfully designed a batch electrocoagulation system to treat peat water by using galvanized iron for domestic usage.

scholarly journals Taguchi Method and Response Surface Methodology in the Treatment of Highly Contaminated Tannery Wastewater Using Commercial Potassium Ferrate

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3784 ◽  
Author(s):  
Violetta Kozik ◽  
Krzysztof Barbusinski ◽  
Maciej Thomas ◽  
Agnieszka Sroda ◽  
Josef Jampilek ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Organic Carbon ◽  
Taguchi Method ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Response Surface ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Tannery Wastewater ◽  
Potassium Ferrate

The potential implementation of Envifer®, a commercial product containing potassium ferrate (40.1% K2FeO4), for the purification of highly contaminated tannery wastewater from leather dyeing processes was proposed. The employment of the Taguchi method for optimization of experiments allowed the discoloration (98.4%), chemical oxygen demand (77.2%), total organic carbon (75.7%), and suspended solids (96.9%) values to be lowered using 1.200 g/L K2FeO4 at pH 3 within 9 min. The application of the central composite design (CCD) and the response surface methodology (RSM) with the use of 1.400 g/L K2FeO4 at pH 4.5 diminished the discoloration, the chemical oxygen demand, the total organic carbon, and suspended solids within 9 min. The Taguchi method is suitable for the initial implementation, while the RSM is superior for the extended optimization of wastewater treatment processes.

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