Advanced Treatment Effect of Compound Montmorillonite Adsorb-Coagulant on Coking Wastewater

2010 ◽  
Vol 171-172 ◽  
pp. 504-507
Author(s):  
Na Li ◽  
Hai Biao Liu ◽  
Jun Li Huang
Keyword(s):  
Treatment Effect ◽  
Biological Treatment ◽  
Ammonia Nitrogen ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Mass Ratio ◽  
Treatment Technology ◽  
Complex Formulation ◽  
Modified Montmorillonite ◽  
Polyaluminium Chloride

The conventional biological treatment technology is inefficiently for coking wastewater. It is meaningful to study the advanced treatment process for these kinds of wastewater. A new compound montmorillonite adsorb-coagulant was prepared by complex formulation of microwave organic modified montmorillonite, Na- montmorillonite and polyaluminium chloride (PAC). And it was used in the advanced treatment of coking wastewater after biological treatment. Experimental results show that the mass ratio of microwave organic modified montmorillonite, Na-montmorillonite and polyaluminium chloride (PAC) is 20: 20: 1, and under the condition of the dosage of 30 g/L, the adsorb-coagulation time of 30 minutes and the sedimentation time of 2 hours, the treatment effect is the best. The effluent concentration of COD and ammonia nitrogen is 33.6mg/L and 10.1mg/L, respectively, and the chroma of effluent is only 2 time. The corresponding removal efficiency is 78.2%, 84.8% and 92%, respectively. And the out-effluent can completely reach the first national discharge standard.

Treatment Effect of Coking Wastewater Using Three-Phase Biological Fluid-Bed with New Ultrastructure Biological Carriers Based on Properties of Biological Materials

2012 ◽  
Vol 625 ◽  
pp. 297-300
Author(s):  
Na Li ◽  
Hai Biao Liu ◽  
Jun Li Huang
Keyword(s):  
Treatment Effect ◽  
Biological Fluid ◽  
Ammonia Nitrogen ◽  
Coking Wastewater ◽  
Activated Sludge Process ◽  
Alkaline Ph ◽  
Optimum Conditions ◽  
Three Phase ◽  
Fluid Bed ◽  
In Series

The degradation of COD and ammonia nitrogen (NH3-N) in coking wastewater was researched using the new ultrastructure biological carriers in three-phase aerobic biological fluid-bed. The results show that the optimum conditions of the new biological carriers are as follows: HRT of 20 h, neutrality skew alkaline pH (about 7.5) and dissolved oxygen (DO) of 2~5mg/L. Under the optimum conditions, the removal efficiency of COD and NH3-N can reach 82% and 87%, respectively, when the influent concentration of COD and NH3-N is about 3000 mg/L and 60mg/L. At the same time, comparison with the activated sludge process and common biological ceramisite carriers, it is found that the most excellent treatment effect and the strongest resistance to impact are obtained under the condition of the shortest HRT in this new ultrastructure biological carriers reactor, and the effluent of two-stage reactors in series can reach the first national discharge standard, which will has a wide application prospect.

Problems Existing in Advanced Treatment and Reuse of Coking Wastewater and Improvement Measures

2014 ◽  
Vol 1073-1076 ◽  
pp. 817-820
Author(s):  
Ya Er Ba ◽  
Zi Fu Li
Keyword(s):  
Advanced Treatment ◽  
Problem Analysis ◽  
Coking Wastewater ◽  
Biochemical Treatment ◽  
Treatment Technology ◽  
Treatment Processes ◽  
Improvement Measures

After biochemical treatment, coking wastewater still contains some organics that are difficult to be degradeda and lot of dissolved salt. Therefore, the biologically treated coking wastewater should be further treated through advanced treatment processes before reuse. The discussions on the advanced treatment technology and the problem analysis in terms of the reuse of coking wastewater are conducted in this study. Possible improvement measures are analyzed and recommended.

Study on Advanced Treatment of Coking Wastewater Using Modified Bentonite

2012 ◽  
Vol 518-523 ◽  
pp. 1997-2000
Author(s):  
Hai Xia Guo ◽  
Fei Ding
Keyword(s):  
Ph Value ◽  
Ammonia Nitrogen ◽  
Advanced Treatment ◽  
Ammonium Bromide ◽  
Coking Wastewater ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Modified Bentonite ◽  
Aluminum Sulphate ◽  
Cetyltrimethyl Ammonium

The purpose of this paper is to study the effectively remove organic and inorganic contaminatants in advanced treatment of coking wastewater and try to find a new efficient and inexpensive economical adsorbent project. The organic-inorganic modified Bentonite is used in the experiment as the adsorbent to find out the adsorptive capability under the different conditions of temperature, PH value, adsorptive time, and so on. The results show that Al—CTMAB MB (Aluminum Sulphate & cetyltrimethyl ammonium bromide Modified Bentonite)can reduce the ammonia nitrogen and COD in coking wastewater in the experiment with the dosage of 50g/L, shock for 30 min and PH value is 9 for the best project.

BAS Municipal Wastewater Advanced Treatment Process

2013 ◽  
Vol 650 ◽  
pp. 638-644
Author(s):  
Qi Wu ◽  
Qian Wu Song ◽  
Le Yong Jiang ◽  
Jin Guo Dai ◽  
Hong Liang Wang ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Treatment Process ◽  
Nitrogen Adsorption ◽  
Ammonia Nitrogen ◽  
Advanced Treatment ◽  
Treatment Technology ◽  
Effluent Quality ◽  
Tai Lake ◽  
Adsorption Technology ◽  
Ceramic Filtration

BAS (Biochemical Adsorption Separation) process is a kind of municipal wastewater advanced treatment process which could treat municipal wastewater directly to meet the Ⅳ class of surface water standard. BAS process integrated by 4 technologies: (1) high elastic cilia filler biochemical treatment technology, (2) effluent from the facultative oxygen zone technology, (3) AZ - 01 ammonia nitrogen adsorption technology and (4) active ceramic filtration technology. The effluent quality of BAS process could reach CODCr≤30mg/L, BOD5≤6mg/L, TP≤0.3mg/L, TN≤1.5mg/L and SS≤1.5mg/L. BAS process has the advantages of easy operation, stable treatment effect, little construction and low operation cost. It is suitable use in our country special sensitive area such as Tai Lake, Dian Chi, etc. and some area which requires higher water quality.

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.

Plant-based versus metal-based coagulants in aquaculture wastewater treatment: Effect of mass ratio and settling time

2021 ◽  
Vol 43 ◽  
pp. 102269
Author(s):  
Azmi Ahmad ◽  
Siti Rozaimah Sheikh Abdullah ◽  
Hassimi Abu Hasan ◽  
Ahmad Razi Othman ◽  
Nur 'Izzati Ismail
Keyword(s):  
Wastewater Treatment ◽  
Treatment Effect ◽  
Settling Time ◽  
Mass Ratio ◽  
Aquaculture Wastewater

Coking Wastewater Physico-Chemical Treatment Technology Evolvement Review

2013 ◽  
Vol 864-867 ◽  
pp. 88-95 ◽  
Author(s):  
Zhi Jiao Liu ◽  
Yun Lng Yang
Keyword(s):  
Wastewater Treatment ◽  
Water Oxidation ◽  
Photocatalytic Oxidation ◽  
Recovery Process ◽  
Coking Wastewater ◽  
Fenton Reagent ◽  
Treatment Technology ◽  
Gas Treatment ◽  
Physico Chemical ◽  
Treatment Research

Coal coking wastewater is generated from coking, coal gas purification and coking product recovery process, its composition is complex and difficult to degrade. By introducing the coking wastewater treatment research and application, such as adsorption,coagulation and sedimentation, flue gas treatment and other physical methods, as well advanced oxidation, wet oxidation, Fenton reagent method, photocatalytic oxidation, ultrasonic oxidation, ozone oxidation method, electrochemical oxidation, supercritical water oxidation, incineration and plasma technology, this paper puts forward the trend of coking wastewater treatment technology.

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