Combined Advanced Oxidation Processes and Aerobic Biological Treatment for Synthetic Fatliquor Used in Tanneries

2012 ◽  
Vol 51 (50) ◽  
pp. 16171-16181 ◽  
Author(s):  
Chitra Kalyanaraman ◽  
Sri Bala Kameswari Kanchinadham ◽  
L. Vidya Devi ◽  
S. Porselvam ◽  
J. Raghava Rao
Keyword(s):  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

Phenol wastewater remediation: advanced oxidation processes coupled to a biological treatment

2007 ◽  
Vol 55 (12) ◽  
pp. 221-227 ◽  
Author(s):  
A. Rubalcaba ◽  
M.E. Suárez-Ojeda ◽  
F. Stüber ◽  
A. Fortuny ◽  
C. Bengoa ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Treatment Plant ◽  
Advanced Oxidation ◽  
Industrial Effluents ◽  
Coupled Processes ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Oxidation Processes

Nowadays, there are increasingly stringent regulations requiring more and more treatment of industrial effluents to generate product waters which could be easily reused or disposed of to the environment without any harmful effects. Therefore, different advanced oxidation processes were investigated as suitable precursors for the biological treatment of industrial effluents containing phenol. Wet air oxidation and Fenton process were tested batch wise, while catalytic wet air oxidation and H2O2-promoted catalytic wet air oxidation processes were studied in a trickle bed reactor, the last two using over activated carbon as catalyst. Effluent characterisation was made by means of substrate conversion (using high liquid performance chromatography), chemical oxygen demand and total organic carbon. Biodegradation parameters (i.e. maximum oxygen uptake rate and oxygen consumption) were obtained from respirometric tests using activated sludge from an urban biological wastewater treatment plant (WWTP). The main goal was to find the proper conditions in terms of biodegradability enhancement, so that these phenolic effluents could be successfully treated in an urban biological WWTP. Results show promising research ways for the development of efficient coupled processes for the treatment of wastewater containing toxic or biologically non-degradable compounds.

Degradation and changes in toxicity and biodegradability of tetracycline during ozone/ultraviolet-based advanced oxidation

2014 ◽  
Vol 70 (7) ◽  
pp. 1229-1235 ◽  
Author(s):  
Huyen Trang Luu ◽  
Kisay Lee
Keyword(s):  
Escherichia Coli ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Vibrio Fischeri ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Uv Treatment ◽  
Experimental Conditions ◽  
Oxidation Processes ◽  
Complete Mineralization

Advanced oxidation processes (AOPs) composed of O3, H2O2 and ultraviolet (UV) were applied to degrade tetracycline (TC). Degradation efficiency was evaluated in terms of changes in absorbance (ABS) and total organic carbon (TOC). The change in biotoxicity was monitored with Escherichia coli and Vibrio fischeri. The improvement in biodegradability during oxidation was demonstrated through 5-day biochemical oxygen demand/chemical oxygen demand ratio and aerobic biological treatment. The combination of O3/H2O2/UV and O3/UV showed the best performance for the reductions in ABS and TOC. However, mineralization and detoxification were not perfect under the experimental conditions that were used in this study. Therefore, for the ultimate treatment of TC compounds, it is suggested that AOP treatment is followed by biological treatment, utilizing enhanced biodegradability. In this study, aerobic biological treatment by Pseudomonas putida was performed for O3/UV-treated TC. It was confirmed that O3/UV treatment improved TOC reduction and facilitated complete mineralization in biological treatment.

Removal of herbicidal ionic liquids by electrochemical advanced oxidation processes combined with biological treatment

2016 ◽  
Vol 38 (9) ◽  
pp. 1093-1099 ◽  
Author(s):  
Daria Pęziak-Kowalska ◽  
Florence Fourcade ◽  
Michał Niemczak ◽  
Abdeltif Amrane ◽  
Łukasz Chrzanowski ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Electrochemical Advanced Oxidation Processes

scholarly journals Mineralization of Wastewater from the Teaching Hospital of Treichville by a Combination of Biological Treatment and Advanced Oxidation Processes

2021 ◽  
pp. 1-10
Author(s):  
Sadia Sahi Placide ◽  
Kambiré Ollo ◽  
Gnamba Corneil Quand-même ◽  
Pohan Lemeyonouin Aliou Guillaume ◽  
Berté Mohamed ◽  
...  
Keyword(s):  
Teaching Hospital ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Reduction Rate ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Biologically Active ◽  
Treated Wastewater ◽  
Oxidation Processes ◽  
Real Wastewater

Biological treatment, due to its low installation cost, is widely used for wastewater treatment. However, this treatment remains ineffective for the oxidation of so-called emerging molecules. To solve this environmental problem, advanced oxidation processes (AOPs) combine with Biological treatment for rapid, efficient and cost-effective purification of wastewater. This combination used in this work, allowed a total mineralization of a real wastewater solution from the teaching hospital of Treichville named CHU of Treichville in Abidjan (CHUT), both in terms of organic and microbiological pollutants. Real wastewater from the CHUT underwent a Biological treatment for 28 days via the Zahn-Wellens methods which made it possible to have a reduction rate of the chemical oxygen demand of more than 90% of biologically active organic pollutants. The biologically treated wastewater was doped with ceftriaxone (CTX) to simulate a situation of wastewater containing a recalcitrant compound after Biological treatment. Subsequently, the doped solution underwent treatment with different AOPs (UV / H2O2, Fe2+ / H2O2 and UV / Fe2+ / H2O2). This combination resulted in a COD reduction rate of over to be higher 98% and total inactivation of microbiological germs.

scholarly journals Comparison of Five Advanced Oxidation Processes for Degradation of Pesticide in Aqueous Solution

2018 ◽  
Vol 13 (1) ◽  
pp. 179 ◽  
Author(s):  
Augustine Chioma Affam ◽  
Malay Chaudhuri ◽  
Shamsul Rahman M. Kutty
Keyword(s):  
Aqueous Solution ◽  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Economic Cost ◽  
Cost Effective ◽  
Reaction Engineering ◽  
Oxidation Processes ◽  
Toc Removal ◽  
Degradation Rate Constant

The study compared the technical efficiency and economic cost of five advanced oxidation processes (Fenton, UV photo-Fenton, solar photo-Fenton, UV/TiO2/H2O2 and FeGAC/H2O2) for degradation of the pesticides chlorpyrifos cypermethrin and chlorothalonil in aqueous solution. The highest degradation in terms of COD and TOC removals and improvement of the biodegradability (BOD5/COD ratio) index (BI) were observed to be (i) Fenton - 69.03% (COD), 55.61% (TOC), and 0.35 (BI); (ii) UV photo-Fenton -78.56% (COD), 63.76% (TOC) and 0.38 (BI);  (iii) solar photo-Fenton - 74.19% (COD), 58.32% (TOC) and 0.36 (BI); (iv) UV/TiO2/H2O2 - 53.62% (COD), 21.54% (TOC), and 0.26 (BI); and  (v) the most technical efficient and cost effective process was FeGAC/H2O2. At an optimum condition (FeGAC 5 g/L, H2O2 100 mg/L, and reaction time of 60 min at pH 3), the COD and TOC removal efficiency were 96.19 and 85.60%, respectively, and the biodegradation index was 0.40. The degradation rate constant and cost were 0.0246 min-1 and $0.74/kg TOC, respectively. The FeGAC/H2O2 process is the most technically efficient and cost effective for pretreatment of the pesticide wastewater before biological treatment. Copyright © 2018 BCREC Group. All rights reservedReceived: 26th July 2017; Revised: 26nd September 2017; Accepted: 27th September 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Affam, A.C., Chaudhuri, M., Kutty, S.R.M. (2018). Comparison of Five Advanced Oxidation Processes for Degradation of Pesticide in Aqueous Solution. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 179-186 (doi:10.9767/bcrec.13.1.1394.179-186) 

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