Advanced Treatment of Ship Sewage by Fenton-Oxidation Process

2014 ◽  
Vol 1010-1012 ◽  
pp. 595-598
Author(s):  
Gui Fang Liu ◽  
Hong Mei Yan ◽  
Yuan Gao ◽  
Ya Quan Sun ◽  
Yu Ping Zhang
Keyword(s):  
Water Quality ◽  
Reaction Time ◽  
Optimum Condition ◽  
Oxidation Process ◽  
Removal Rate ◽  
Quality Standard ◽  
Fenton Oxidation ◽  
Domestic Water ◽  
Cod Removal Rate ◽  
Fenton Oxidation Process

Fenton-oxidation process was used to treat the simulation ship sewage that had met the requirement of IMO discharge standard. The effects of reaction time, doses of H2O2 and FeSO4, pH and temperature on COD removal rate were investigated. The results showed that the optimum condition for treating simulation ship sewage was as follows: pH=3.0, concentration of H2O2=9 mmol/L, concentration of FeSO4=3 mmol/L, and reaction time=30 min. Under the optimum condition, the removal rate of COD was to 62.7%. The water quality of the effluent could meet Miscellaneous Domestic Water Quality Standard.

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.

Treatment of Sodium Formate Wastewater by Fenton Oxidation Process

2012 ◽  
Vol 573-574 ◽  
pp. 627-630
Author(s):  
Zhi Gang Chen ◽  
Rui Xue Zhang ◽  
Bo Zhang ◽  
An Ping Wei
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Oxidation Process ◽  
Ph Value ◽  
Sodium Formate ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Initial Ph ◽  
Fenton Oxidation Process

In this study, in order to reduce the sodium formate concentration thereby reducing toxicity, the treatment of this wastewater by Fenton process was investigated. The effects of initial PH value, reaction time, concentration of FeSO4• 7H2O, and H2O2 dosage on the removal efficiency of COD were studied respectively. The experiment results show that when using Fenton oxidization pretreatment process, with pH 2.0, FeSO4•7H2O concentration 4000mg/L, H2O2(30 % ) portion 4ml/L, and reaction time 20min, COD removal efficiency was more than 50%, oxidization efficiency was good.

Study on the Advanced Treatment of Pulp and Paper Wastewater by Fenton Oxidation and its Comparison with Ozone Oxidation

2013 ◽  
Vol 726-731 ◽  
pp. 1744-1750 ◽  
Author(s):  
Li Jun Huang ◽  
Li Ying Song ◽  
Hong You Wan ◽  
Ke Zeng
Keyword(s):  
Reaction Time ◽  
Treatment Effect ◽  
Removal Rate ◽  
Pulp And Paper ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Ozone Oxidation ◽  
Continuous Increase ◽  
Paper Wastewater ◽  
Cod Removal Rate

The treatment on the secondary biochemical effluent of pulp and paper wastewater by Fenton oxidation was studied and the influence of H2O2dosage, Fe2+dosage, pH and reaction time on the treatment effect was investigated by the orthogonal test and single-factor test. The treatment effect was eminent when the H2O2dosage was 3.75mmol/L, Fe2+dosage was 3.20mmol/L, pH was 4.00 and the reaction time was 80.00min. The removal rate of UV254and chromaticity significantly increased as H2O2dosage was 1.88 ~ 3.75mmol /L, but the COD removal rate declined as H2O2dosage was more than 2.81mmol/L; each removal rate increased and then decreased slightly with the increase of Fe2+dosage, each removal rate dropped obviously as pH was more than 5.00; within 80.00min, the removal rate increased significantly, it changed little with the continuous increase of reaction time. Under the optimal conditions, the COD removal with Fenton oxidation was more effective and its removal rate could achieve 88.33%, it was advantageous compared with ozone oxidation; but the elimination effect of UV254and chromaticity to pulp and paper wastewater with ozone oxidation was better, the two removal rate achieved 83.70% and 92.00% in a short time, respectively. Although it could reach such a removal effect by Fenton oxidation, it did not have the superiority in reaction time.

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 of Pretreatment of Textile Wastewater Using CaO2/H+/Fe2+ Advanced Fenton-Like Oxidation Technology

2014 ◽  
Vol 675-677 ◽  
pp. 568-573
Author(s):  
Xiu Guo Lu ◽  
Pan Lin ◽  
Qi Wu Jie
Keyword(s):  
Wastewater Treatment ◽  
Reaction Time ◽  
Removal Rate ◽  
Textile Wastewater ◽  
Fenton Oxidation ◽  
Calcium Peroxide ◽  
Result Show ◽  
Oxidation Technology ◽  
Cod Removal Rate ◽  
The Cost

The study explores pretreatment of textile Wastewater by using CaO2/H+/Fe2+ advanced Fenton-like oxidation technology. The result show that when the initial COD is 2200mg/L, the pH=3, the reaction time is 40min, the speed is 150r/min, the dosage of calcium peroxide is 24g/L and the dosage of FeSO4 is 2g/L at 25°C, the removal rate of COD reach 81.82% and the decolorization rate is 99.93%. Compared to the pure CaO2 oxidation, COD removal rate increased significantly and its processing effect is greatly increased; whereas Compared to the advanced Fenton oxidation technology, this kind of Fenton-like system greatly reduces the cost, improve the effect of effluent, provide new way for calcium peroxide used in wastewater treatment.

The Pretreatment of Polyvinyl Alcohol Wastewater with Flocculation-Fenton Oxidation Technology Based on Fe2+

2012 ◽  
Vol 518-523 ◽  
pp. 3089-3095
Author(s):  
Shan Hong Lan ◽  
Xiu Wen Wu ◽  
Yue Ting Wang ◽  
Ping Ting Liu
Keyword(s):  
Polyvinyl Alcohol ◽  
Removal Efficiency ◽  
Oxidation Process ◽  
Removal Rate ◽  
Fenton Oxidation ◽  
Oxidation Technology ◽  
Fenton Oxidation Process ◽  
Better Than ◽  
Raw Wastewater

The polyvinyl alcohol (PVA) wastewater was pretreated by the process of flocculation-Fenton oxidation. Raw wastewater was treated by the different flocculants first. The results showed that when the flocculant FeSO4 was used, its effect was better than Fe2(SO4)3 and PAC, the dosage of it was 10g/L, under which COD removal efficiency reached 61.72%. The effects of FeSO4 and H2O2 addition and pH on treatment effect were studied in the follow-up Fenton oxidation. The results showed that when the addition of FeSO4 was 20g/L, the dosage of H2O2 was 250mL/L, pH was 4, the removal efficiency of COD reached over 90%. The experiments of fractionated adding the reagents showed that the removal rate of COD was significantly higher in the situation of fractionated adding FeSO4 required in the flocculation and Fenton oxidation process than one-time added. The removal rate of COD changed little when the H2O2 fractionated addition in the process of Fenton oxidation.

scholarly journals Towards Water and Energy Self-Sufficiency: a Closed-Loop, Solar-Driven, Low-Tech Laundry Pilot Facility (LaundReCycle) for the Reuse of Laundry Wastewater

2021 ◽  
Author(s):  
Devi Buehler ◽  
Nadine Antenen ◽  
Matthias Frei ◽  
Christoph Koller ◽  
Diederik P. L. Rousseau ◽  
...  
Keyword(s):  
Water Quality ◽  
Energy Consumption ◽  
Second Life ◽  
Removal Rate ◽  
Treated Wastewater ◽  
Water Losses ◽  
Batch Mode ◽  
Self Sufficiency ◽  
Cod Removal Rate ◽  
Photovoltaic Plant

AbstractIn the scope of this study, a pilot facility for the recycling of laundry effluent was developed and tested. With the aim to enable nearly complete energy and water self-sufficiency, the system is powered by a photovoltaic plant with second-life batteries, treats the wastewater within the unit and constantly reuses the treated wastewater for washing in a closed cycle. The technology for wastewater treatment is based on a low-tech approach consisting of a physical/mechanical pre-treatment and biological treatment in trickling filter columns. The treatment process is operated in batch mode for a capacity of five washing cycles per day. During five weeks of operation water quality, energy consumption and production, water losses and washing performance were monitored. The system recovered 69% of the used water for the washing machine while treating the wastewater to the necessary water quality levels. The average COD removal rate per cycle was 92%. Energy analysis was based on modelled data of the monitored energy consumption. With the current set-up, an internal consumption rate of 80% and self-sufficiency of 30% were modelled. Future developments aim at increasing water and energy self-sufficiency and optimizing the water treatment efficiency.

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

Research of 6-Nitry Industrial Wastewater Treatment by Coagulation-Fenton Oxidation

2012 ◽  
Vol 518-523 ◽  
pp. 2745-2748
Author(s):  
Ling Yan Ren ◽  
Gang Xu
Keyword(s):  
Treatment Effect ◽  
Industrial Wastewater ◽  
Removal Rate ◽  
Sulfate Solution ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Reagent ◽  
Oxidation Treatment ◽  
Cod Removal Rate ◽  
Solution Acidity

The paper adopted Coagulation-Fenton Oxidation Method on treating the wastewater of 6-nitro-1,2 diazonium oxygroup naphthalene-4-sulfoacid production process (i.e. 6-nitry wastewater), introduced the treatment effect of the combined technology used on 6-nitry wastewater, and studied the factors influencing the treatment effect, to determine the reasonable parameters of the technology on treating 6-nitry wastewater. The results showed that Using polyaluminium chloride (mass fraction 2%) as flocculant for treating 6-nitry wastewater, the COD removal rate reached up to 48.7%; Making Fenton reagent oxidation treatment on coagulation yielding water, under the best conditions for solution acidity controlled at pH3 or so, in the 100 mL wastewater, 30% hydrogen peroxide was 5.0 mL, 0.5 mol/L ferrous sulfate solution was 4.0 mL, reaction time was 60 min, the COD removal rate could reach 98% or more.

Comparison of Degradation and Decoloration on Cigarette Industry Wastewater by Ozone and Advanced Oxidation

2013 ◽  
Vol 295-298 ◽  
pp. 1168-1172
Author(s):  
Jing Shi Li ◽  
Xiao Jun Wang ◽  
Rui Deng ◽  
Zhi Hua Pang
Keyword(s):  
Reaction Time ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Simple Operation ◽  
Cigarette Industry ◽  
Optimum Parameters ◽  
Cod Removal Rate ◽  
Decoloration Rate ◽  
Operation Cost ◽  
Industry Wastewater

Chromaticity of cigarette industry wastewater increase when treating by aerobic due to large quantities of lignin, nicotine and carbohydrate. Ozone and advance oxidation are proposed for degradation and decoloration of cigarette wastewater that processed by aerobic. The result shows that ozone process has its advantage of high decoloration rate, simple operation and low operation cost. Optimum parameters of ozone process are ozone dosage of 37.65mg/L, reaction time of 15min, reaction pH of 7.0-9.0. The COD removal rate is 38.3% when the decoloration rate is 57.5%. Operation cost of ozone process is 0.4 yuan/m3.

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