Development of a Reactor in a Continuous System Using Advanced Oxidation Processes to Reduce Chemical Oxygen Demand in Industrial Effluent

2021 ◽  
pp. 914-921
Author(s):  
Cassiano Ricardo Brandt ◽  
Daniel Kuhn ◽  
Ytan Andreine Schweizer ◽  
Sabrina Grando Cordeiro ◽  
Ani Caroline Weber ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Continuous System ◽  
Advanced Oxidation ◽  
Oxidation Processes

Advanced treatment of dyehouse effluents by Fe(II) and Mn(II)-catalyzed ozonation and the H2O2/O3 process

2000 ◽  
Vol 42 (1-2) ◽  
pp. 13-18 ◽  
Author(s):  
I. Arslan ◽  
I. Akmehmet Balcioglu ◽  
T. Tuhkanen
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Treatment Time ◽  
Effective Means ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Oxidation Products ◽  
Advanced Treatment ◽  
Oxidation Processes

Treatment of synthetic dyehouse effluent containing six reactive dyestuffs and their assisting chemicals by O3/Fe(II), O3/Mn(II), and O3/H2O2 advanced oxidation processes was investigated. All oxidation processes were capable of completely decolourizing the wastewater within 30 min. Decolourization proceeded fastest by the O3/Mn(II) process, whereas the O3/H2O2 combination was more efficient in the removal of DOC (Dissolved Organic carbon) and UV254nm which were 11 and 53%, respectively, for one hour treatment time. Application of Fe(II)-catalyzed ozonation provided an effective means of removing colour and COD (Chemical Oxygen Demand) by a five- and nine-fold enhancement, respectively, compared with conventional coagulation applied at the same coagulant doses. Formation of toxic oxidation products was not observed during the course of treatment with all investigated advanced oxidation processes.

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.

scholarly journals Advanced Oxidation Processes and Nanofiltration to Reduce the Color and Chemical Oxygen Demand of Waste Soy Sauce

2018 ◽  
Vol 10 (8) ◽  
pp. 2929 ◽  
Author(s):  
Hyun-Hee Jang ◽  
Gyu-Tae Seo ◽  
Dae-Woon Jeong
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Oxygen Demand ◽  
Color Removal ◽  
Soy Sauce ◽  
Treatment Efficiency ◽  
Cod Reduction ◽  
Oxidation Processes ◽  
Oxidation Efficiency

Currently, the ozone (O3) oxidation efficiency in the treatment of waste soy sauce provides 34.2% color removal and a 27.4% reduction in its chemical oxygen demand (COD). To improve the O3 oxidation efficiency, hydrogen peroxide (H2O2) is used to cause a H2O2/O3 process. In H2O2/O3 process experiments, a previously optimized pH of 11 and applied O3 dose of 50 mg L−1 were used and the H2O2/O3 ratio was varied between 0.1 and 0.9 in intervals of 0.2. The results show that an H2O2/O3 ratio of 0.3 results in the highest efficiencies in terms of color removal (51.6%) and COD reduction (33.8%). Nanofiltration (NF) was used to pretreat the waste soy sauce to improve color removal and COD reduction. The results showed that NF with an NE-70 membrane results in 80.8% color removal and 79.6% COD reduction. Finally, the combination of NF and H2O2/O3 process resulted in the best treatment efficiency: 98.1% color removal and 98.2% COD reduction. Thus, NF & H2O2/O3 process can be considered as one of the best treatment methods for waste soy sauce, which requires high intrinsic color removal and COD reduction efficiencies.

Application of New Synthesized Materials Based on Anionic Clays for Industrial Effluent Decoloration

2013 ◽  
Vol 837 ◽  
pp. 271-276 ◽  
Author(s):  
Laura Dartu ◽  
Carmen Zaharia ◽  
Gabriela Carja
Keyword(s):  
Advanced Oxidation Processes ◽  
Uv Light ◽  
Industrial Effluent ◽  
Advanced Oxidation ◽  
Operating Conditions ◽  
Environmental Applications ◽  
Ferrous Ions ◽  
Oxidation Processes ◽  
Anionic Clays ◽  
Catalyst Type

This work reports hydrotalcite and zinc-substituted hydrotalcite (MeAlLDHs) anionic clays as novel catalytic formulations for some environmental applications regarding specific industrial coloured effluents. In this context, layered double hydroxides, covered or with tailored compositions, were synthesized, characterized using advanced analytical analysis techniques (XRD, FTIR, SEM) and tested in specific environmental applications. More specifically, LDHs samples were tested as catalysts for different treatments of coloured effluents, especially some advanced oxidation processes (i.e.heterogeneous advanced oxidation processes with H2O2of Orange 16 dye-containing effluent). The influence of some operating factors such as catalyst type, concentration of hydrogen peroxide, presence of ferrous ions or UV light, contact time was studied, and the adequate operating values were established. Results show that Orange 16 removal is more than 70%, in specific operating conditions, for two of new tested materials (ZnAlLDH 3:1, and MgAlLDH 3:1). Moreover, the action of UV radiation was found efficient in decomposition of Orange 16 dye in the presence of all four tested catalytic materials, improving with more than 40-50% the color removal.

Oxidative degradation of AOX and COD by different advanced oxidation processes: a comparative study with two samples of a pharmaceutical wastewater

1997 ◽  
Vol 35 (4) ◽  
pp. 257-264 ◽  
Author(s):  
Claus Höfl ◽  
Gerhard Sigl ◽  
Oliver Specht ◽  
Ilse Wurdack ◽  
Dietrich Wabner
Keyword(s):  
Advanced Oxidation Processes ◽  
Oxidative Degradation ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
The Other ◽  
Ozone Treatment ◽  
Pharmaceutical Wastewater ◽  
Oxidation Processes ◽  
Organic Halogen ◽  
Two Samples

Using two samples of a pharmaceutical wastewater, the efficiency of three advanced oxidation processes (AOPs) (H2O2/UV, O3/UV and H2O2/Fe(II)) for the removal of adsorbable organic halogen (AOX) and chemical oxygen demand (COD) were compared on a laboratory scale. The AOX contents of these samples ranged from 3 to 5 mg/L. Generally the results showed that all three methods are suitable for the degradation of AOX and COD. UV irradiation involved a high selectivity for the degradation of AOX compared to COD. On the other hand, processes based on hydroxyl radicals were less selective but considerably more effective in COD degradation. This explains why the combined methods H2O2/UV and O3/UV lead both to a complete destruction of AOX and a large removal of COD. During ozone treatment – without UV radiation – a decrease of AOX was also observed, although to a lower degree. Using Fenton's reagent both AOX and COD could be removed almost completely. The reaction time needed for this kind of treatment was very low compared to the other two AOPs. O3/UV treatment showed the largest consumption of “activated” oxygen (AO) during COD degradation. H2O2/Fe(II) treatment required almost the same amount of AO as H2O2/UV.

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.

Pengolahan Air Limbah Laboratorium Menggunakan Metode AOPs (ADVANCED OXIDATION PROCESSES) Dengan Pereaksi Fenton (H2O2 dan FeSO4) Pada Skala Batch

2018 ◽  
Author(s):  
Gede H Cahyana
Keyword(s):  
Industrial Wastewater ◽  
Advanced Oxidation Processes ◽  
Biological Process ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Optimum Dose ◽  
Fenton Reagent ◽  
Oxidation Processes ◽  
Low Concentrations ◽  
Reduction Efficiency

Laboratory wastewater was derived from analytical activities in the laboratory and grouped to hazardous waste. It was different from hazardous industrial wastewater because of many different pollutants. The composition of its dangerous substances was not easy to be processed by biological process. Therefore, chemical method was tried, namely Advanced Oxidation Processes (AOPs). The optimum dose of Fenton (H2O2 and FeSO4) reagent was the purpose to reduce the concentration of Chemical Oxygen Demand (COD). Variations applied were COD concentrations, which were 10,090,09 mg / L, 5.009,01 mg / L and 511,71 mg / L with varied reagen. The optimum dose of Fenton reagent was obtained 1: 300 with COD reduction efficiency as follows: COD concentration 10,090,09 mg / L = 21,43%, COD concentration 5.009,01 mg / L = 46,76% and concentration of COD 511,71 mg / L = 83,10%. The results suggested that Fenton could to reduce COD concentration up to 80% in relatively low concentrations. Keywords: laboratory wastewater, Fenton, COD, batch

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