Effect of Catalytic Material in Environment Pollution Treatment

2010 ◽  
Vol 156-157 ◽  
pp. 1323-1326
Author(s):  
Li Nan Zhu ◽  
Yong Jun Wang ◽  
Lin Zhang
Keyword(s):  
Methylene Blue ◽  
Treatment Process ◽  
Removal Rate ◽  
Dye Wastewater ◽  
Environment Pollution ◽  
Solution Ph ◽  
Wastewater Treatment Process ◽  
Catalytic Material ◽  
Pollution Treatment ◽  
High Voltage Discharge

Some catalytic materials can be utilized in environment pollution treatment. The material of ceramisite can be used in dye wastewater treatment process with its good properties. When they were filled in the high voltage discharge reactor, the ceramsite pellets were polarized, and partial discharge could take place beside every pellet, which would promote methylene blue degeneration in the dye wastewater. And when the solution pH>ceramsite pHzpc, the ceramsite surface presented the electronegativity and the ceramsite could adsorb more methylene blue, and removal rate increased.

Biological wastewater treatment by a bioreactor with repeated coupling of aerobes and anaerobes aiming at on-site reduction of excess sludge

2006 ◽  
Vol 53 (9) ◽  
pp. 71-77 ◽  
Author(s):  
Anfeng Yu ◽  
Quan Feng ◽  
Zehua Liu ◽  
Yunan Zhou ◽  
Xin-Hui Xing
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Removal Rate ◽  
Settling Tank ◽  
Technological Innovations ◽  
Biological Wastewater Treatment ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Complex Microbial Community ◽  
Continuous Running

Activated sludge has been widely used in wastewater treatment throughout the world. However, the biggest disadvantage of this method is the by-production of excess sludge in a large amount, resulting in difficulties in operation and high costs for wastewater treatment. Technological innovations for wastewater treatment capable of reducing excess sludge have thus become research topics of interest in recent years. In our present research, we developed a new biological wastewater treatment process by repeated coupling of aerobes and anaerobes (rCAA) to reduce the excess sludge during the treatment of wastewater. During 460-day continuous running, COD (300–700 mg/L) and TOC (100–350 mg/L) were effectively removed, of which the removal rate was above 80 and 90%, respectively. SS in the effluent was 13 mg/L on average in the rCAA bioreactor without a settling tank. The on-site reduction of the excess sludge in the rCAA might be contributed by several mechanisms. The degradation of the grown aerobes after moving into the anaerobic regions was considered to be one of the most important factors. Besides, the repeatedly coupling of aerobes and anaerobes could also result in a complex microbial community with more metazoans and decoupling of the microbial anabolism and catabolism.

Study on Treatment of Dye Wastewater by UASB-Biological Contact Oxidation Process

2012 ◽  
Vol 627 ◽  
pp. 390-393 ◽  
Author(s):  
Ji Gang Yuan ◽  
Bi Rong Wang ◽  
Cheng Duan Wang
Keyword(s):  
Stainless Steel ◽  
Treatment Process ◽  
Oxidation Process ◽  
Dye Wastewater ◽  
Volume Loading ◽  
Wastewater Treatment Process ◽  
Oxidation Pond ◽  
Contact Oxidation ◽  
Oxidation Reactor ◽  
Biological Contact Oxidation

A continuously fed stainless steel anaerobic UASB and biological contact oxidation reactor were used in sequence for the experimentation. Dye wastewater which initial COD was 2850mg/L, the COD remove ratio reached to 72% by UASB, COD remove ratio reached to 99% by Biological Contact Oxidation pond. NV (Volume loading) of UASB reached to 1.83 kg COD/ (m3•d), NV of Biological Contact Oxidation pond reached to 1.12 kg COD/ (m3•d). Considering the development of UASB and biological contact oxidation，a dye wastewater treatment process was proposed.

Study on Decolorization for Dye Wastewater by Adsorption - Microwave Degradation Activated Carbon from Bean Dregs

2012 ◽  
Vol 581-582 ◽  
pp. 214-218 ◽  
Author(s):  
Yong Hong Shui ◽  
Hong Yan Song ◽  
Xi Ling Feng ◽  
Qiao Qiao Li ◽  
Yue Jiang
Keyword(s):  
Activated Carbon ◽  
Microwave Radiation ◽  
Treatment Process ◽  
Ph Value ◽  
Dye Wastewater ◽  
Dyeing Wastewater ◽  
Wastewater Treatment Process ◽  
Decolorization Rate ◽  
First Time ◽  
Bean Dregs

In order to improve the decolorization of dyeing wastewater, reduce the resources and energy consumption of the wastewater treatment process, Activated carbon from bean dregs (ACBD) was prepared the first time. The decolorizing effects of Methylene Blue on the activated carbon-microwave degradation were discussed. The decolorizing rate of dye-wastewaters respect on adsorbent time(t), adsorbent dosage(m) and pH value were investigated. And the conventional treatment results were compared. The results showed that microwave radiation could accelerate the adsorption of dye on carbon. Improve the decolorization rate and reduce the bleaching time. The decolorization rate reach to 98% after 10 seconds with 1.67g/L ACBD at pH=5.66 when 60mL for the 250mg/L dye wastewater. Compared with usual adsorption, conventional methods take 90min to reach the bleaching effect of microwave radiation just 10s under differently the quantity of ACBD. The decolorization time reduces greatly by microwave degradation.

Adsorption Properties of Pomelo Peels against Methylene Blue in Dye Wastewater

2013 ◽  
Vol 634-638 ◽  
pp. 178-181 ◽  
Author(s):  
Su Xia Hou
Keyword(s):  
Methylene Blue ◽  
Adsorption Process ◽  
Ph Value ◽  
Removal Rate ◽  
Rate Equations ◽  
Dye Wastewater ◽  
Optimum Conditions ◽  
Isothermal Adsorption ◽  
Pomelo Peel ◽  
Blue Solution

Pomelo peel was chosen as adsorbent to treat the simulated dye wastewater with methylene blue. The research results showed the removal rate of 140mg/L methylene blue solution with 100mL could reach more than 83% under the optimum conditions, which were as follows: 0.4g pomelo peels powder, reaction temperature 30°C, pH value 8 and oscillating time 60min.Theoretical saturation absorptive capacity of pomelo peel was 133mg/g at 30°C.The whole adsorption process can be well described by the Langmuir and Temkin isothermal adsorption equation and secondary adsorption rate equations.

Anaerobic Biological Filter - Biological Contact Oxidation Process of High Salt Wastewater Treatment Process Coupling and Influencing Factors

2014 ◽  
Vol 1014 ◽  
pp. 303-306
Author(s):  
Ya Shu Yuan ◽  
Xin Yuan ◽  
Xin Cao ◽  
Peng Fei Yu ◽  
Chun Lin Liu
Keyword(s):  
Treatment Process ◽  
Removal Rate ◽  
Cod Removal ◽  
Feed Water ◽  
Wastewater Treatment Process ◽  
Oxidation Pond ◽  
Biological Filter ◽  
Contact Oxidation ◽  
Cod Removal Rate ◽  
Biological Contact Oxidation

In this study a food company in the production of sauerkraut pickled wastewater as an object, using the anaerobic biological filter and biological contact oxidation pond process, feed water salinity, HRT are investigated, and the effects of each process. The results showed that anaerobic biological filter when HRT is 36 h, the COD removal rate can reach 81%. Biological contact oxidation pool when HRT is 60 h, when the COD removal rate reached 85%. Anaerobic biological filter - biological contact oxidation coupling process of pickling wastewater removal effect is obvious, after processing salted COD removal rate reached 88%.

Comparison of F-specific bacteriophage, enterococci, and faecal coliform densities through a wastewater treatment process employing oxidation ponds

1995 ◽  
Vol 31 (5-6) ◽  
pp. 85-89 ◽  
Author(s):  
S. J. Turner ◽  
G. D. Lewis
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Faecal Coliform ◽  
Indicator Organisms ◽  
Faecal Coliforms ◽  
Wastewater Treatment Process ◽  
Oxidation Pond ◽  
Oxidation Ponds ◽  
Specific Bacteriophage

Over a 12 month period F-specific bacteriophages, faecal coliforms and enterococci were compared as microbial indicator organisms for the quality of a wastewater treatment (oxidation pond) system. Results suggest that enterococci may be the most useful indicator for oxidation pond systems.

Heterogeneous Fenton Catalytic Removal of Organic Pollutant in Aqueous Solution by using Coal Gangue as a Catalyst

2019 ◽  
Vol 12 (4) ◽  
pp. 312-325
Author(s):  
Jiwei Zhang ◽  
Jingjing Xu ◽  
Shuaixia Liu ◽  
Baoxiang Gu ◽  
Feng Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Removal Rate ◽  
Organic Pollutant ◽  
Coal Gangue ◽  
Ion Leakage ◽  
Heterogeneous Fenton ◽  
Solution Ph ◽  
X Ray

Background: Coal gangue was used as a catalyst in heterogeneous Fenton process for the degradation of azo dye and phenol. The influencing factors, such as solution pH gangue concentration and hydrogen peroxide dosage were investigated, and the reaction mechanism between coal gangue and hydrogen peroxide was also discussed. Methods: Experimental results showed that coal gangue has the ability to activate hydrogen peroxide to degrade environmental pollutants in aqueous solution. Under optimal conditions, after 60 minutes of treatment, more than 90.57% of reactive red dye was removed, and the removal efficiency of Chemical Oxygen Demand (COD) up to 72.83%. Results: Both hydroxyl radical and superoxide radical anion participated in the degradation of organic pollutant but hydroxyl radical predominated. Stability tests for coal gangue were also carried out via the continuous degradation experiment and ion leakage analysis. After five times continuous degradation, dye removal rate decreased slightly and the leached Fe was still at very low level (2.24-3.02 mg L-1). The results of Scanning Electron Microscope (SEM), energy dispersive X-Ray Spectrometer (EDS) and X-Ray Powder Diffraction (XRD) indicated that coal gangue catalyst is stable after five times continuous reuse. Conclusion: The progress in this research suggested that coal gangue is a potential nature catalyst for the efficient degradation of organic pollutant in water and wastewater via the Fenton reaction.

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