scholarly journals Advanced treatment of biologically treated coking wastewater by persulfate oxidation with magnetic activated carbon composite as a catalyst

2018 ◽  
Vol 77 (7) ◽  
pp. 1891-1898 ◽  
Author(s):  
Xiulan Song ◽  
Chao Wang ◽  
Meiqin Liu ◽  
Miao Zhang
Keyword(s):  
Activated Carbon ◽  
Carbon Composite ◽  
Gas Chromatography Mass Spectrometry ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Green Catalyst ◽  
Persulfate Oxidation ◽  
Magnetic Activated Carbon ◽  
Toc Removal ◽  
First Order Kinetics

Abstract Advanced treatment of biologically treated coking wastewater (BTCW) using persulfate (PS) oxidation with magnetic activated carbon composite (CuFe2O4:AC w/w ratio of 1:1.5, denoted as 1.5-MACC) as a green catalyst was evaluated at ambient temperature (30 °C). Effects of PS (K2S2O8) and 1.5-MACC doses on PS decomposition and total organic carbon (TOC) removal in BTCW were also studied during 360 min. The results showed that the 1.5-MACC/PS system has a much better performance on TOC removal in BTCW than only 1.5-MACC or PS system. PS decomposition and TOC removal follow first-order kinetics in the 1.5-MACC/PS system. The optimum condition of the 1.5-MACC/PS system to treat BTCW is with a K2S2O8 dose of 4 g L−1 and 1.5-MACC dose of 5 g L−1. Under this condition, TOC in the PS oxidation effluent is 20.4 mg L−1 with a removal efficiency of 85.4%. TOC removal is a synergistic effect of adsorption and oxidation. TOC oxidation is due to the generation of ·SO4− via the activation of PS by CuFe2O4 impregnated AC. The gas chromatography–mass spectrometry (GC-MS) analysis revealed that phenol compounds and esters were removed significantly by the 1.5-MACC/PS system. When 1.5-MACC was used for the fourth time in the 1.5-MACC/PS system, the removal ratio of TOC was still over 62.2% in 360 min reaction. Thus, the 1.5-MACC/PS system has a potential practical application in treatment of BTCW.

Preparation of a New Adsorption Material and its Application in Wastewater Treatment

2011 ◽  
Vol 356-360 ◽  
pp. 498-501
Author(s):  
Wen Jie Jin ◽  
Fan Chao Zeng ◽  
Han Xue ◽  
Ying Wang
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Biochemical Process ◽  
Effluent Water ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
New Material

A kind of new adsorption material for wastewater treatment was made of fly ash as the main composition, with addition of sodium silicate, cement and pore forming material as the accessory materials, etc. Three kinds of practical wastewater were treated by using the new material, they were printing and dyeing wastewater, papermaking wastewater and coking wastewater, respectively. The results showed that removal COD efficiencies of the three kinds of wastewater were 57.89%, 71.43%, 80%, respectively, removal color efficiencies were 90%, 92%, 92%, respectively. The new developed material was mainly used for advanced treatment of the effluent water after biochemical process. It will be a substitute for activated carbon materials and have preferable application prospect.

Improvement in carbofuran degradation by different Fenton’s reagent dosing processes

2011 ◽  
Vol 27 (10) ◽  
pp. 934-944 ◽  
Author(s):  
Ying-Shih Ma
Keyword(s):  
Rate Constants ◽  
Degradation Products ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Spectrometry Analysis ◽  
Toc Removal ◽  
First Order Kinetics ◽  
Made In

Attempts were made in this study to examine the efficiency of Fenton’s reagent with different dosing processes and H2O2 and Fe2+ concentrations for the treatment of carbofuran wastewater. Carbofuran degradation, total organic carbon (TOC) removal and H2O2 consumption were determined during the experiments. Increases in H2O2 and Fe2+ concentrations led to an increase in the degradation of carbofuran. Almost 100% of carbofuran could be degraded at pH 3, 120 mg L-1 H2O2, 24 mg L-1 Fe2+ and 30 minutes reaction time; removals of TOC were among 48.8%–53.3% under different dosing processes. A continuous dosing process was beneficial to improve the removal of TOC by Fenton’s reagent. Rate constants of carbofuran degradation could be calculated by the first-order kinetics; increase in the Fenton’s reagent generally increased the rate constants. Gas chromatography-mass spectrometry analysis found five degradation products by hydroxyl radicals attack. Thus, this study might offer an effective dosing way for carbofuran wastewater treatment by Fenton’s reagent.

Pilot Scale Study on Advanced Treatment of Coking Wastewater with Biological Activated Carbon Technology

2014 ◽  
Vol 1073-1076 ◽  
pp. 995-999
Author(s):  
Jin Li ◽  
Guang Hua Wang ◽  
Wen Bing Li ◽  
Zheng Zhu ◽  
Yin An Zhu
Keyword(s):  
Activated Carbon ◽  
Removal Rate ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Laboratory Scale ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Biological Activated Carbon ◽  
Scale Test ◽  
Cod Removal Rate

This paper reports about a pilot-scale feasibility study of Advanced Treatment of Coking Wastewater with Biological Activated Carbon technology based on the better experimental data of laboratory scale test .The self-designed of the Biological Activated Carbon Aerated tower was based on the optimal operating conditions of the results obtained from laboratory scale test.The removal efficiency to pollutants of efficient compound bacterium is estimated in biological activated carbon process through the variation of COD concentration, chromaticity, and Contrast the total ion chromatogram and UV absorbance spectrum of effluent and inflow.The results of the pilot-scale test show that BAC technology may be a suitable option for the advanced treatment of Coking Wastewater. the efficient degrading strains can reproduce on the activated carbon quickly.Concentrations of COD and chromaticity in outflow water were at a lower level (with COD about 60mg/L and chromaticity about 50 degree), the average COD removal rate greater than 50% and chromaticity removal rate greater than 70%.

A Study on Advanced Treatment for Coking Wastewater with Biological Activated Carbon Based on Efficient Degrading Flora

2012 ◽  
Vol 581-582 ◽  
pp. 1129-1132 ◽  
Author(s):  
Guang Hua Wang ◽  
Xue Qin Liu ◽  
Wen Bing Li ◽  
Yun Zhou Lu ◽  
Ming Dong Sun
Keyword(s):  
Waste Water ◽  
Activated Carbon ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Cod Removal ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Biological Activated Carbon ◽  
Removal Ratio ◽  
Cod Removal Rate

The removal efficiency of degrading flora which has been constructed is investigated in biological carbon process through the variation of COD and chromaticity. The results show that the efficient degrading strains can reproduce on the activated carbon quickly；the biological activated carbon reactor，in which degrading flora to coking waste water are inoculated，is adopted to carry out the treatment of wastewater，in such a way the COD and chromaticity in outflow water can remain at a lower level (with COD about 50mg/L and chromaticity about 50 degree). The average COD removal rate is 71% and the chromaticity removal ratio is 95%.

scholarly journals Effect of calcination temperature on the catalytic performance of CoFe2O4/Nitrogen doped sludge based activated carbon in activation of peroxymonosulfate for degradation of coking wastewater

2018 ◽  
Vol 238 ◽  
pp. 03009
Author(s):  
Yongkang Tao ◽  
Lihua Li ◽  
Lixiong Ren ◽  
Yu Liang ◽  
Xin Wang
Keyword(s):  
Activated Carbon ◽  
Calcination Temperature ◽  
Removal Rate ◽  
Polymer Network ◽  
Catalytic Performance ◽  
Coking Wastewater ◽  
Nitrogen Doped ◽  
Catalytic Activities ◽  
Toc Removal ◽  
First Time

A novel supported heterogeneous magnetic catalyst CoFe2O4/N-doped sludge based activated carbon (CoFe2O4/N-SAC) was prepared by polymer network gel method for the first time. The physicochemical properties of the materials were characterized by means of XRD, SEM, TEM, VSM and XPS techniques. The prepared catalyst is applied to the heterogeneous activation of peroxymonosulfate for degradation of coking wastewater, and the effect of calcination temperature on the catalytic activity was investigated. The result reveals that the catalyst shows the highest catalytic activities under the calcination temperature is 800 °C with the TOC removal rate of coking wastewater is 84.31%.

New Biology for Advanced Wastewater Treatment

1999 ◽  
Vol 40 (4-5) ◽  
pp. 137-144 ◽  
Author(s):  
K. Miserez ◽  
S. Philips ◽  
W. Verstraete
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Organic Carbon ◽  
Genetically Modified Organisms ◽  
New Technologies ◽  
Chemical Oxidation ◽  
Advanced Treatment ◽  
Biological Activated Carbon ◽  
Catabolic Potential ◽  
New Biology

A number of new technologies for the advanced treatment of wastewater have recently been developed. The oxidative cometabolic transformation by methanotrophs and by nitrifiers represent new approaches in relation to organic carbon. The Biological Activated Carbon Oxidative Filters characterized by thin biofilms are also promising in that respect. Moreover, implementing genetically modified organisms with improved catabolic potential in advanced water treatment comes into perspective. For very refractory effluents chemical support techniques, like e.g. strong chemical oxidation, can be lined up with advanced biology.

Advanced Treatment of Coking Wastewater by Oxidation Process Using Pyrite and Hydrogen Peroxide

2013 ◽  
Vol 726-731 ◽  
pp. 2521-2525
Author(s):  
Zhi Yong Zhang ◽  
De Li Wu
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidation Process ◽  
Low Cost ◽  
Oxygen Demand ◽  
Utilization Efficiency ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Second Stage ◽  
Potential Alternative ◽  
High Utilization

Coking wastewater is a kind of recalcitrant wastewater including complicate compositions. Advanced treatment of coking wastewater by Fenton-Like reaction using pyrite as catalyst was investigated in this paper. The results show that the chemical oxygen demand (COD) of coking wastewater decreased significantly by method of coagulation combined with two-stage oxidation reaction. COD of wastewater can decrease from 250mg/l to 45mg/l after treatment, when 2g/L pyrite was used in each stage oxidation and the dosage of hydrogen peroxide (H2O2) is 0.2ml/l for first stage treatment, 0.1ml/l for second stage treatment respectively. The pyrite is effective to promote Fenton-Like reaction with low cost due to high utilization efficiency of H2O2, moreover, catalyst could be easily recovered and reused. The Fenton-Like reaction might be used as a potential alternative to advanced treatment of recalcitrant wastewater.

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