Treatment of Polymerization Effluents from Acrylic Fiber Manufacturing Using a Combination Process of Flocculation and Fenton Oxidation

2011 ◽  
Vol 332-334 ◽  
pp. 1582-1585
Author(s):  
Bin Cai ◽  
Xin Wang ◽  
Xiao Li Dai ◽  
Guang Xu Yan ◽  
Shao Hui Guo
Keyword(s):  
Reaction Time ◽  
Total Nitrogen ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Combined Process ◽  
Acrylic Fiber ◽  
Combination Process ◽  
Fiber Manufacturing ◽  
Acrylic Fibers

A combined process of flocculation and Fenton oxidation was studied for the treatment of polymerization effluents (PME) from the manufacture of dry-spun acrylic fibers. 5 inorganic and 3 organic flocculants were investigated and the optimal regents and conditons were PAC (at 25°C, pH=8 and a dosage of 150 mg/L), and Z7650 (at 25°C, pH=6 and a dosage of 10 mg/L). Under this condition, the COD was removed by 23.1% of the initial 1824 mg/L. The optimum efficiency of Fenton process was determined at 25°C and pH=4 with a reaction time of 90 min. The dosage of H2O2 and the rate of c(H2O2)/c(FeSO4) were respectively 0.53 mol/L and 20:1. Finally, the removal of COD, total nitrogen, ammonia, SO32- and turbidity by the combined process were 64.0%, 99.3%, 99.6%, 99.7% and 89.4% respectively. BOD/COD was also improved from 0.09 to 0.25.

scholarly journals Treatment of oilfield wastewater by combined process of micro-electrolysis, Fenton oxidation and coagulation

2017 ◽  
Vol 76 (12) ◽  
pp. 3278-3288 ◽  
Author(s):  
Zhenchao Zhang
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Oily Wastewater ◽  
Optimum Conditions ◽  
Combined Process ◽  
Cod Removal Efficiency ◽  
Optimized Conditions

Abstract In this study, a combined process was developed that included micro-electrolysis, Fenton oxidation and coagulation to treat oilfield fracturing wastewater. Micro-electrolysis and Fenton oxidation were applied to reduce chemical oxygen demand (COD) organic load and to enhance organic components gradability, respectively. Orthogonal experiment were employed to investigate the influence factors of micro-electrolysis and Fenton oxidation on COD removal efficiency. For micro-electrolysis, the optimum conditions were: pH, 3; iron-carbon dosage, 50 mg/L; mass ratio of iron-carbon, 2:3; reaction time, 60 min. For Fenton oxidation, a total reaction time of 90 min, a H2O2 dosage of 12 mg/L, with a H2O2/Fe2+ mole ratio of 30, pH of 3 were selected to achieve optimum oxidation. The optimum conditions in coagulation process: pH, cationic polyacrylamide dosage, mixing speed and time is 4.3, 2 mg/L, 150 rpm and 30 s, respectively. In the continuous treatment process under optimized conditions, the COD of oily wastewater fell 56.95%, 46.23%, 30.67%, respectively, from last stage and the total COD removal efficiency reached 83.94% (from 4,314 to 693 mg/L). In the overall treatment process under optimized conditions, the COD of oily wastewater was reduced from 4,314 to 637 mg/L, and the COD removal efficiency reached 85.23%. The contribution of each stage is 68.45% (micro-electrolysis), 24.07% (Fenton oxidation), 7.48% (coagulation), respectively. Micro-electrolysis is the uppermost influencing process on COD removal. Compared with the COD removal efficiency of three processes on raw wastewater under optimized conditions: the COD removal efficiency of single micro-electrolysis, single Fenton oxidation, single coagulation is 58.34%, 44.88% and 39.72%, respectively. Experiments proved the effect of combined process is marvelous and the overall water quality of the final effluent could meet the class III national wastewater discharge standard of petrochemical industry of China (GB8978-1996).

Multiple responses analysis and modeling of Fenton process for treatment of high strength landfill leachate

2011 ◽  
Vol 64 (8) ◽  
pp. 1652-1660 ◽  
Author(s):  
Soraya Mohajeri ◽  
Hamidi Abdul Aziz ◽  
Mohammed Ali Zahed ◽  
Leila Mohajeri ◽  
Mohammed J. K. Bashir ◽  
...  
Keyword(s):  
Reaction Time ◽  
Landfill Leachate ◽  
High Strength ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Factors Influencing ◽  
Potential Source ◽  
Groundwater Ecosystems ◽  
Main Factors ◽  
Quadratic Effects

Landfill leachate is one of the most recalcitrant wastes for biotreatment and can be considered a potential source of contamination to surface and groundwater ecosystems. In the present study, Fenton oxidation was employed for degradation of stabilized landfill leachate. Response surface methodology was applied to analyze, model and optimize the process parameters, i.e. pH and reaction time as well as the initial concentrations of hydrogen peroxide and ferrous ion. Analysis of variance showed that good coefficients of determination were obtained (R2 > 0.99), thus ensuring satisfactory agreement of the second-order regression model with the experimental data. The results indicated that, pH and its quadratic effects were the main factors influencing Fenton oxidation. Furthermore, antagonistic effects between pH and other variables were observed. The optimum H2O2 concentration, Fe(II) concentration, pH and reaction time were 0.033 mol/L, 0.011 mol/L, 3 and 145 min, respectively, with 58.3% COD, 79.0% color and 82.1% iron removals.

Treatment of Mid-Stage Pulping Effluent Using the Combined Process of Microelectrolysis and Fenton Oxidation-Coagulation

2013 ◽  
Vol 295-298 ◽  
pp. 2001-2010
Author(s):  
Shan Hong Lan ◽  
Xiu Wen Wu ◽  
Yue Ting Wang
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Fenton Oxidation ◽  
Treatment Efficiency ◽  
Combined System ◽  
Removal Rates ◽  
Combined Process ◽  
First Order ◽  
Carbon Mass ◽  
Final Effluent

Mid-stage Pulping Wastewater was pretreated in a combined system of microelectrolysis and Fenton oxidation-coagulation . When the aeration was 6L/min, the ratio of iron-carbon mass was 4/1, the addition of iron was 1500mg/L, pH was 4, and reaction time was 30min, the removal rates of COD and chrominance reached 65% and 60% respectively and the concentration of generated Fe2+ reached 157mg/L. Fe2+ generated by micro-electrolysis process was used for the following Fenton oxidation. When the conditions was without additional Fe2+, the addition of H2O2 (concentration is 30%) was 3mL/L, pH was 4, and the reaction time was 15min, the removal rates of COD and chrominance both reached over 80% and the concentration of generated Fe2+ reached 217mg/L. Fe3+ generated by Fenton oxidation was used for following studies of flocculation. The treatment efficiency of three kinds of flocculants PAM, PAC and silicate was compared. The results showed that the effect of PAM was best, the treatment efficiency reached the best when its additon was 0.15mL/L as pH was 7. the removal efficiency of COD reached 41% and the chrominance removal efficiency reached 75%, the final effluent chrominance was 4 and the COD concentration was 45mg/L which was lower than 60mg/L, that met with the first order of effluent standard.

Study on Treatment of Wastewater from Papermaking Using Fenton Oxidation

2013 ◽  
Vol 726-731 ◽  
pp. 1760-1763 ◽  
Author(s):  
Gang Li ◽  
Jun Yu ◽  
Yan Hao Zhang ◽  
Lei Gao ◽  
Bo He
Keyword(s):  
Reaction Time ◽  
Influencing Factors ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Biochemical Treatment ◽  
Oxidation Treatment ◽  
Paper Making ◽  
Papermaking Wastewater

The performance of biochemical treatment effluent from paper making wastewater treated by Fenton process was evaluated. The experiment result shows that the importance of influencing factors for Fenton oxidation treatment was H2O2 concentrations > pH > FeSO4 concentrations > reaction time. With the optimal conditions of reaction, that is pH3 (initial pH5), FeSO4 3.6 mmol/L, H2O2 3.4 mmol/L, and reaction time 60 min, the removals of COD and color for papermaking wastewater reached over 85% and 90%, respectively. The result also showed that in the process of Fenton method in the treatment of papermaking wastewater, for removing COD, the function by oxidation account for 15.5%, and the function of flocculation accounted for 69.8%.

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.

Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Desalination ◽  
2012 ◽  
Vol 284 ◽  
pp. 62-65 ◽  
Author(s):  
Jin Li ◽  
Zhaokun Luan ◽  
Lian Yu ◽  
Zhongguang Ji
Keyword(s):  
Fenton Process ◽  
Acrylic Fiber ◽  
Fiber Manufacturing

Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 631-639
Author(s):  
MOHAMMAD HADI ARYAIE MONFARED ◽  
HOSSEIN RESALATI ◽  
ALI GHASEMIAN ◽  
MARTIN A. HUBBE
Keyword(s):  
Adverse Effects ◽  
Control Sample ◽  
Pressure Sensitive Adhesive ◽  
Acrylic Fiber ◽  
Burst Strength ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Tear Index ◽  
Breaking Length ◽  
Acrylic Fibers

This study investigated the addition of acrylic fiber to old corrugated container (OCC) pulp as a possible means of overcoming adverse effects of water-based pressure sensitive adhesives during manufacture of paper or paperboard. Such adhesives can constitute a main source of stickies, which hurt the efficiency of the papermaking process and make tacky spots in the product. The highest amount of acrylic fiber added to recycled pulps generally resulted in a 77% reduction in accepted pulp microstickies. The addition of acrylic fibers also increased pulp freeness, tear index, burst strength, and breaking length, though there was a reduction in screen yield. Hence, in addition to controlling the adverse effects of stickies, the addition of acrylic fibers resulted in the improvement of the mechanical properties of paper compared with a control sample.

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