Advanced Processing of Biologically-Treated Papermaking Wastewater by Poly-Aluminum Chloride (PAC)

2013 ◽  
Vol 409-410 ◽  
pp. 129-132
Author(s):  
Yong Qiang Zhu ◽  
Yu Ling Feng ◽  
Hai Ying Zhang ◽  
Zhan Jun Zhang
Keyword(s):  
Removal Efficiency ◽  
Aluminum Chloride ◽  
Industrial Wastewater ◽  
Optimal Dosage ◽  
Optimal Conditions ◽  
Wastewater Discharge ◽  
Paper Making ◽  
Stirring Time ◽  
Papermaking Wastewater

In this study, biologically treated paper-making wastewater was treated using PAC to study removal efficiency of color as a function of pH and dosage of PAC. It was found that PAC was relatively effective in removing color from biologically papermaking wastewater. The optimal dosage, pH and stirring time were 40 mL L-1, 5 and 30 min, respectively. Effluent color after coagulation at the optimal conditions was 40 PCU, meeting requirements of Industrial Wastewater Discharge Standard of Pulping and Papermaking (GB3544-2008) . Therefore, PAC dosage of 40 mL L-1 and pH of 5 were recommended for treatment of biologically treated papermaking wastewater.

Advanced Processing of Biologically-Treated Leachate by PAC

2011 ◽  
Vol 474-476 ◽  
pp. 1057-1062
Author(s):  
Hai Ying Zhang ◽  
Dong Hui Chen ◽  
Yi Zheng ◽  
Jing Yu Qi
Keyword(s):  
Optimal Condition ◽  
Influencing Factors ◽  
Removal Efficiency ◽  
Advanced Treatment ◽  
Optimal Dosage ◽  
Optimal Conditions ◽  
Wastewater Discharge ◽  
Biochemical Treatment ◽  
Effluent Quality

In this study, biologically treated leachate was treated using PAC and PAC + PAM, respectively, to study removal efficiency of COD, SS and color as a function of such influencing factors as pH, dosage of PACand/or PAM. It was found that optimal dosage and pH are 800 mg/L and 6 for PAC. The optimal condition when using PAM + PACfor removal of COD was 10-minute reaction, pH of 5, PAC dosage of 800 mg/L, PAM dosage of 3 mg/L. Effluent quality after coagulation at the optimal conditions met requirements of the tertiary standard described in “Integrated wastewater discharge standard”. Coagulation using PAM + PAC at the optimal condition was recommended for advanced treatment of refractory leachate after biochemical treatment.

scholarly journals Treatment of High-Strength Animal Industrial Wastewater Using Photo-Assisted Fenton Oxidation Coupled to Photocatalytic Technology

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1553 ◽  
Author(s):  
Jae Hong Park ◽  
Dong Seok Shin ◽  
Jae Kwan Lee
Keyword(s):  
Light Intensity ◽  
Removal Efficiency ◽  
Industrial Wastewater ◽  
Uv Light ◽  
High Strength ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Optimal Conditions ◽  
Experimental Conditions ◽  
Animal Wastewater

Animal wastewater is one of the wastewaters that has a color and is difficult to treat because it contains a large amount of non-degradable organic materials. The photo-assisted Fenton oxidation technique was applied to treat animal wastewater, and the optimal conditions of chemical oxygen demands (COD) removal were analyzed according to changes in pH, ferrous ion, H2O2, and ultraviolet (UV) light intensity as a single experimental condition. Experimental results showed that, under the single-factor experimental conditions, the optimal conditions for degradation of animal wastewater were pH 3.5, Fe(II) 0.01 M, H2O2 0.1 M, light intensity 3.524 mW/m2. Under the optimal conditions, COD removal efficiency was 91%, sludge production was 2.5 mL from 100 mL of solution, color removal efficiency was 80%, and coliform removal efficiency was 99.5%.

scholarly journals Optimization studies on turbidity removal from cosmetics wastewater using aluminum sulfate and blends of fishbone

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Prosper E. Ovuoraye ◽  
Victor I. Ugonabo ◽  
Gina F. Nwokocha
Keyword(s):  
Removal Efficiency ◽  
Environmental Protection Agency ◽  
Industrial Wastewater ◽  
Cost Benefit Analysis ◽  
Correlation Coefficients ◽  
Cost Benefit ◽  
Settling Time ◽  
Quadratic Model ◽  
Optimal Conditions ◽  
Turbidity Removal

AbstractThis research is centered on the optimization of coagulation–flocculation treatment of cosmetic wastewater. It analyzes blends of fishbone (BFB) and aluminum-based coagulant (ABC) to determine the efficacy of BFB as a potential coagulant–flocculants aid at optimum conditions using response surface methodology (RSM). The experiment was carried out employing the standard nephelometric procedure at 1000 rpm stirring rate. The central composite design (CCD) was used to examine the interactions of pH, dosage, and settling time to maximize the turbidity removal efficiency of the ABC- and BFB-driven coag–flocculation. The optimal pH, dosage, and settling time for ABC were obtained as 10, 0.1 g/L, and 2 min, while pH 6, 0.4 g/L, and settling time of 4 min were recorded for BFB following the established quadratic model of the RSM. The removal efficiency of ABC and BFB plots 80% and 88%, respectively; this corresponds to 262 NTU and 288 NTU of removal from the wastewater at optimal conditions. The kinetics result indicated that the rate constant (Kf) 3 × 10−3 (L/g min) of BFB surpassed 5 × 10−5 (L/g min) recorded for ABC following second-order coag–flocculation reaction, with correlation coefficients (R2) values of 0.999 and 0.9985, respectively. The research also applied cost–benefit analysis for the determination of the efficacy of BFB. The figure obtained shows that the benefit of using BFB will save $5.50 compared to ABC based on this work. At optimal conditions, BFB satisfied the environmental protection agency pH standard for industrial wastewater discharge, promising coagulant–flocculants aid for industrial wastewater purification purpose and the preservation of the environment.

Study on the Treatment of Nylon Chemical Industrial Wastewater by AF+ A/O Process

2011 ◽  
Vol 71-78 ◽  
pp. 3133-3136
Author(s):  
Jie Zhang ◽  
Qun Hui Wang ◽  
Peng Li ◽  
Hai Ming Huang ◽  
Wen Jun Wang ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Treatment Effect ◽  
Industrial Wastewater ◽  
High Efficiency ◽  
First Grade ◽  
Wastewater Discharge ◽  
N Removal ◽  
New Type ◽  
Nitrogen Treatment ◽  
A Company

A company in Pingdingshan of Henan province using a new type of AF (high-efficiency immobilized biological anaerobic biofilter ) and A/O process to treat nylon chemical industrial wastewater, In this study, we monitored the system for one month (Dec.1.2010-Jan.1.2011). The effect of the conditions of temperature, pH and COD, nitrate, ammonia and total nitrogen treatment effect along the system were investigated, the results showed that: average COD removal efficiency reached 97%, average NH4+-N removal efficiency was higher than 90% and the effect of the system is good. The effluent meets the first grade criteria of integrated wastewater discharge standard (GB8978-1996).

Study on Advanced Pretreatment of Seawater by Electrolysis and Neutralization of Acidic Waste Water with By-Product Magnesium Hydroxide

2013 ◽  
Vol 821-822 ◽  
pp. 1071-1080
Author(s):  
Jing Nie ◽  
Shou Zhi Yi ◽  
Di Miao
Keyword(s):  
Removal Efficiency ◽  
Magnesium Hydroxide ◽  
Current Density ◽  
Industrial Wastewater ◽  
Removal Rate ◽  
Influence Factors ◽  
Operation Time ◽  
Wastewater Discharge ◽  
Electrode Distance

The advanced pretreatment by electrolysis of Bohai seawater in Tianjin used a diaphragm electrolyzer in the experiment. Removal efficiency and influence factors of the method were analyzed. Results show that turbidity, organic compounds, SDI and chroma of seawater were effectively decreased by electrolysis. Removal efficiency was significantly increased by current density, operation time and inter-electrode distance, and the optimum electrolytic conditions was determined as inter-electrode distance of 2 cm, current density of 15.87 mA·cm-2, operation time of 10 minutes. It was investigated that when the water quality after electrolysis was of pH 8.6, the chroma and turbidity decreasing trend slowed down, with chroma of 0.052 A, removal rate reached 88.4%; the residual turbidity reduced to 2.52 NTU, removal rate reached 90.71%. A PH of about 8.5, CODCr decreasing trend slowed down, and when CODCr < 750 mg/L, it conformed to the requirements of the reverse osmosis water. With the study on neutralization of steel pickling waste liquor by the by-product of magnesium hydroxide, it is found that the quality of treated water reached 3rd level national emissions standards (300-1000 mg/L). Magnesium hydroxide slurry of Cr (VI) removal rate reached 100%, conforming to the 1st level national industrial wastewater discharge standards (< 0.5 mg/L).

Study on in-Depth Processing of Coking Wastewater by Coagulation with Aluminum Sulfate

2010 ◽  
Vol 159 ◽  
pp. 493-498 ◽  
Author(s):  
Yi Zheng ◽  
Zhuo Zhang ◽  
Hong Tao Hu ◽  
Xia Liang Wei
Keyword(s):  
Optimal Condition ◽  
Removal Efficiency ◽  
Aluminum Sulfate ◽  
Secondary Standard ◽  
Coking Wastewater ◽  
Optimal Conditions ◽  
Wastewater Discharge ◽  
Optimum Conditions ◽  
Optimum Dosage ◽  
Depth Processing

In this study, in-depth processing of biologically-pretreated coking wastewater was performed using aluminum sulfate (alum) and alum + PAM, respectively, aiming to study removal efficiency of COD, SS and color of coking wastewater as a function of pH, alum dosage and/or PAM, and to determine the optimal conditions for treatment of the coking wastewater. It was found that the optimum dosage and pH are 300 mg/L and 6.5 for coagulation with alum. The optimal condition for coagulation/flocculation with PAM + alum was 15-minute reaction, pH of 6.5, alum dosage of 220 mg/L, PAM dosage of 6 mg/L. Coagulation using alum and PAM at the optimal condition was more efficient than treatment using single alum for removal of COD and color. Effluent COD after coagulation at the optimum conditions met requirements of the secondary standard described in “Integrated wastewater discharge standard”, while the corresponding color exceeded the limit. Hence, coagulation using alum was found to be inefficient in reduction of color for biologically treated coking wastewater.

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%.

scholarly journals Industrial Wastewater Discharge Retrieval Based on Stable Nighttime Light Imagery in China from 1992 to 2010

2014 ◽  
Vol 6 (8) ◽  
pp. 7566-7579 ◽  
Author(s):  
Zhaofu Li ◽  
Hongyu Liu ◽  
Chuan Luo ◽  
Panpan Li ◽  
Hengpeng Li ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Wastewater Discharge ◽  
Nighttime Light ◽  
Nighttime Light Imagery

Removal of phenol from steel wastewater by combined electrocoagulation with photo-Fenton

2018 ◽  
Vol 78 (6) ◽  
pp. 1260-1267 ◽  
Author(s):  
Mohammad Malakootian ◽  
Mohammad Reza Heidari
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Current Density ◽  
Steel Industry ◽  
High Efficiency ◽  
Oxygen Demand ◽  
Optimal Conditions ◽  
Suitable Alternative ◽  
Steel Mills ◽  
Real Wastewater

Abstract Phenol and its derivatives are available in various industries such as refineries, coking plants, steel mills, drugs, pesticides, paints, plastics, explosives and herbicides industries. This substance is carcinogenic and highly toxic to humans. The purpose of the study was to investigate the removal of phenol from wastewater of the steel industry using the electrocoagulation–photo-Fenton (EC-PF) process. Phenol and chemical oxygen demand (COD) removal efficiency were investigated using the parameters pH, Fe2+/H2O2, reaction time and current density. The highest removal efficiency rates of phenol and COD were 100 and 98%, respectively, for real wastewater under optimal conditions of pH = 4, current density = 1.5 mA/cm2, Fe2+/H2O2 = 1.5 and reaction time of 25 min. Combination of the two effective methods for the removal of phenol and COD, photocatalytic electrocoagulation photo-Fenton process is a suitable alternative for the removal of organic pollutants in industry wastewater because of the low consumption of chemicals, absence of sludge and other side products, and its high efficiency.

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