The Preparation of Chitosan and its Application in the Treatment of Electroplating Wastewater

2014 ◽  
Vol 955-959 ◽  
pp. 2449-2452
Author(s):  
Liu Hui Ru ◽  
Zhong Cai Hua ◽  
Feng Rui Jun
Keyword(s):  
Wastewater Treatment ◽  
Treatment Effect ◽  
Ph Value ◽  
Removal Rate ◽  
Mixing Time ◽  
Copper Ion ◽  
Adsorption Rate ◽  
Influence Of Temperature ◽  
Electroplating Wastewater

In this paper, the chitosan was prepared for treatment of electroplating wastewater. The influence of temperature, PH value, the amount of chitosan and mixing time on the effects of the wastewater treatment was investigated. The result showed that at PH=3, with the addition of 0.6g chitosan and 2h of mixing, the optimum wastewater treatment effect can be obtained. The removal rate of COD is above 80% and the adsorption rate of copper ion is above 99%. The decolourization ratio and the turbidity indicated that the treatment is effective.

Optimization of Operating Conditions on Ceramic Printing Wastewater Treatment with Coagulation and Sedimentation Method

2013 ◽  
Vol 664 ◽  
pp. 383-389
Author(s):  
Yong Li Zhang ◽  
Xu Biao Yu ◽  
Chao Hai Wei ◽  
Ling Ling Shang ◽  
Ce Shi
Keyword(s):  
Wastewater Treatment ◽  
Ph Value ◽  
Removal Rate ◽  
Mixing Time ◽  
Operating Conditions ◽  
Intensity Increase ◽  
Sedimentation Method ◽  
Water Ph ◽  
Time Extension ◽  
Stirring Intensity

The ceramic printing wastewater was treated with coagulation sedimentation method by adopted AlCl3 polymerization (PAC) as a coagulant. In order to optimize the wastewater treatment of operating conditions, with absorbance, turbidity and conductivity for testing index, the PAC dosing quantity, stirring time, stirring intensity and influx water pH value on the influence of the wastewater treatment. The results show that the wastewater absorbance and turbidity with PAC dosing quantity increase, mixing time extension and stirring intensity increase present reduced trend, with the water pH increases present first decreases trend of increase; Proper operating conditions of wastewater treatment: PAC dosing quantity 90 mg/L, mixing time 15 min, mixing strength medium speed and influx water pH value is about seven. On this condition, ceramic printing wastewater treatment of effluent decolorization rate reached 86.9%, turbidity removal rate reached 92.5%, conductivity is 2.05 x 103 s/cm.

Study of Electroplating Wastewater Treatment by Magnetoelectric Oxidation Biological Filter

2012 ◽  
Vol 518-523 ◽  
pp. 2218-2223
Author(s):  
Xu Xin Zhao ◽  
Yun Long Peng ◽  
Chang Kun Liu ◽  
Lin Fang
Keyword(s):  
Wastewater Treatment ◽  
Ph Value ◽  
Removal Rate ◽  
Aeration Rate ◽  
Core Component ◽  
Electroplating Wastewater ◽  
Treatment Performance ◽  
Carbon Tube ◽  
Biological Filter ◽  
Treatment Conditions

In this study, a magnetlectric oxidation biological filter (MOBF) was investigated for the removal of organic pollutants, heavy metal ions and cyanide ions in electroplating wastewater. The influencing factors including the inlet water flow, external DC voltage, aeration rate of the MOBF on wastewater treatment performance were studied. Data analyses show that with iron-carbon tube as the core component, the MOBF’s removal rate for COD, Cr6+, Cu2+, Zn2+ and CN- were 93%, 99.99%, 99.7%, 96% and 99%, respectively. The best treatment conditions for the MOBF were as follows: the inlet and outlet pH value of 3.5 and 8.5 respectively, the external voltage of 3.8V. When the inlet wastewater flux is 40L/h, the aeration rate is 1m3/h.

Research on the Start-Up Effect of Two-Phase Anaerobic Baffled Reactor

2013 ◽  
Vol 448-453 ◽  
pp. 600-603
Author(s):  
Ling Jing ◽  
Xin Xia Wang
Keyword(s):  
Wastewater Treatment ◽  
Ph Value ◽  
Removal Rate ◽  
Limiting Factors ◽  
Small Cities ◽  
Two Phase ◽  
Anaerobic Reactor ◽  
Anaerobic Baffled Reactor ◽  
Low Concentration ◽  
Start Up

Aiming at the fact that the low concentration sewage in small cities, this paper presents Two-phase Anaerobic Baffled Reactor (TAABR) for living wastewater treatment, importantly, it designs and researches Two-phase Anaerobic Baffled Reactor and its advantages, designs a trial project according to the characteristics of the reactor equip. The experiment uses the method that by shortening HRT to raise the load to start and analyses the operating results during startup as follows: 1. 53 days later anaerobic reactor start-up successes.2. When the load is 0.5kgCOD/m3.d, the removal rate of COD is more than 80%. 3. PH value is not the main limiting factors during start up in the reactor and there is basically no danger of excessive acidification.

Primary Study on the Pollution Control of Overflow by Stepwise Adsorption Purification Bed

2010 ◽  
Vol 113-116 ◽  
pp. 259-262
Author(s):  
Chun Du Wu ◽  
Chun Xia Liu ◽  
Qing Jie Xie
Keyword(s):  
Wastewater Treatment ◽  
Treatment Effect ◽  
Pollution Control ◽  
Removal Rate ◽  
The Self ◽  
Paddy Fields ◽  
Primary Study ◽  
Rotten Wood ◽  
High Removal Rate ◽  
Natural Purification

In this paper a stepwise adsorption purification bed was introduced to be used for overflow wastewater treatment. According to the principle of natural purification of soil and paddy fields on sewage, the stepwise adsorption purification bed imitated the self-purification function of natural materials, such as defoliation，rotten wood, charcoal and the stone were processed as filler. The removal rate of the parameters, such as COD, NH3-N and TP was invested to show the treatment effect of this system. The result showed that the system had a high removal rate of the contamination in the sewage. The COD, NH3-N and TP removal rates can reach up to 80%, 85.8% and 84% respectively.

The Treatment of Acid Copper-Containing Wastewater by Eggshell-Flyash System

2011 ◽  
Vol 183-185 ◽  
pp. 967-970
Author(s):  
Tao Liu
Keyword(s):  
Heavy Metal ◽  
Calcination Temperature ◽  
Removal Efficiency ◽  
Treatment Effect ◽  
Ph Value ◽  
Removal Rate ◽  
Good Treatment ◽  
Egg Shells ◽  
Egg Shell ◽  
Application Prospects

Removal efficiency of heavy metal Cu from acid wastewater using egg shell as adsorbent was investigated. The influence of calcination temperature and dosage of egg shell, as well as pH value on the removal efficiency were discussed to obtain the optimum removal condition. The results show that the removal rate of lead would achieve the best result of 99.56% when we use the egg shells calcined at 400°C,2h, and the content of egg shells is 30g/L, pH=3.0.Using eggshells to treat acid chrome-containing wastewater is simple and easy to be operated, which has application prospects for the process and good treatment effect.

Removal of Copper Ion in Industrial Wastewater by Magnetic Flocculation Experimental Research

2013 ◽  
Vol 295-298 ◽  
pp. 1231-1234 ◽  
Author(s):  
Yong Gui Yang ◽  
Yun Long Yang ◽  
Xiao Hong Kang
Keyword(s):  
Industrial Wastewater ◽  
Ph Value ◽  
Copper Ions ◽  
Removal Rate ◽  
Copper Ion ◽  
Good Effect ◽  
Magnetic Powder ◽  
Wastewater Discharge ◽  
Sedimentation Time

An experiment on the removal of heavy metal copper ions from industrial wastewater by magnetic flocculation was studied and the influences of PFS dosage static sedimentation time，temperature，pH value and magnetic powder dosage on treatment effect were discussed at the same time .The result of the test showed that when the dosage of PFS and magnetic powder were 100 and 400 mg/l respectively the pH value was 8.0，the static sedimentation time was 20min, the said process had a good effect on copper containing wastewater treatment. The removal rate of copper ions was over 97％，and the mass concentration of copper ions in the effluent water was below 0.5mg/l. Therefore after be treated by magnetic flocculation the quality of copper-containing wastewater could meet the requirement of GB 8978-1996 Integrated Wastewater Discharge Standard .

Optimization and Characteristics of Copper Pickling Wastewater Treatment in a Single Reactor Using Bio-Electrode Process

2012 ◽  
Vol 446-449 ◽  
pp. 2800-2808
Author(s):  
Guo Jing Yang ◽  
Shuang Shuang Chen ◽  
Wei Hong Wu ◽  
Jian Zhou
Keyword(s):  
Hydraulic Retention Time ◽  
Nitrate Nitrogen ◽  
Ph Value ◽  
Removal Rate ◽  
Copper Ion ◽  
Ion Concentration ◽  
Effluent Water ◽  
Ion Removal ◽  
Secondary Pollution ◽  
Denitrifying Microorganisms

The process optimization and characteristics of electrode-biofilm for the treatment of copper pickling wastewater in the self-designed reactor were experimentally investigated. Carbon electrodes were installed in the reactor as the anode and cathode and denitrifying microorganisms were fixed on the surface of the cathode. The results showed that neutralization, copper ion removal, denitrification proceeded simultaneously and no secondary pollution existed. The removal rate of total nitrogen and copper ion in the effluent water reached 98% and 97% at 30mg/L of copper ion concentration and 100mg/L of nitrate nitrogen when the conditions were controlled at temperature 35°C, current density 0.1mA/cm2, hydraulic retention time 11h and C/N ration 1.07. The pH value of the treated water was increased almost to neutral. In addition, copper ion solution of certain concentration and purity could be made by exchanging the polarity of anode and cathode to recycle copper in this research.

Research on Micro-Electrolysis Method to Treat the Copper-Containing Electroplating Wastewater

2013 ◽  
Vol 864-867 ◽  
pp. 1560-1563
Author(s):  
Yi Ting Zhang ◽  
Hai Bo Lun
Keyword(s):  
Wastewater Treatment ◽  
Reaction Time ◽  
Total Mass ◽  
Removal Rate ◽  
Mass Ratio ◽  
Experimental Conditions ◽  
Electroplating Wastewater ◽  
Initial Ph ◽  
Carbon Mass ◽  
Electrolysis Method

Iron-carbon micro-electrolysis was applied in the treatment of the electroplating wastewater containing copper, and the parameters that affected the efficiencies of the wastewater treatment had been discussed, The results indicated that the optimal experimental conditions were initial pH 4, stirring speed 100r/min, total mass of iron and carbon 4g/0.1L, iron carbon mass ratio of 1, reaction time was 40min. The removal rate of the Cu2+was 99% or more, the effluent can meet emissions standards

Performance of a Subsurface Wastewater Infiltration System (SWIS) Using a Novel Biosubstrate

2012 ◽  
Vol 610-613 ◽  
pp. 1770-1773
Author(s):  
Ying Hua Li ◽  
Hai Bo Li ◽  
Xin Wang ◽  
Tie Heng Sun
Keyword(s):  
Wastewater Treatment ◽  
Biological Activity ◽  
Treatment Effect ◽  
Removal Rate ◽  
Domestic Wastewater ◽  
Treatment Technology ◽  
High Biological Activity ◽  
Traditional Technology ◽  
Domestic Wastewater Treatment ◽  
Pollutants Removal

Subsurface wastewater infiltration treatment system (SWIS) is a domestic wastewater treatment technology. While the traditional technology has a large floor area, long starting period and low pollutants removal rate. A new biosubstrate that can be applied in SWIS is studied, experiments about its characteristics were performed, and treatment effect was compared. The results show that the biosubstrate has high biological activity, with it, SWIS has shorter starting period, better pollutants removal rate and consequently needs less floor space.

Study on Oil Refining Wastewater Treatment by Membrane Bioreactor with A/O Process

2012 ◽  
Vol 518-523 ◽  
pp. 2854-2857
Author(s):  
Guo De Li ◽  
Na Li ◽  
Shi Wei Wu
Keyword(s):  
Wastewater Treatment ◽  
Membrane Bioreactor ◽  
Ph Value ◽  
Removal Rate ◽  
Oil Refining ◽  
Submerged Membrane Bioreactor ◽  
Result Show

In this experimentation an A/O submerged membrane bioreactor was designed to study the treatment of oil-refining wastewater. The result show that the average effluent COD was below 18 mg/L, the removal rate of COD was over 97% and the removal rate was stable; the removal rate of NH4+-N was influenced by PH value, the average effluent NH4+-N was less than 0.97 mg/L and the average removal rate was over 98%; the average effluent oil was below 5mg/L and removal rate was over 96%; effluent phenol was less than 0.12mg/L and the removal rate was nearly 100%.

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