Impact of vacuum UV on natural and algal organic matter from cyanobacterial impacted waters

2020 ◽  
Vol 6 (3) ◽  
pp. 829-838
Author(s):  
Flavia Visentin ◽  
Siddharth Bhartia ◽  
Madjid Mohseni ◽  
Sigrid Peldszus ◽  
Sarah Dorner ◽  
...  
Keyword(s):  
Water Quality ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Cyanobacterial Bloom ◽  
Remote Communities ◽  
Taste And Odor ◽  
Potential Applicability ◽  
Algal Organic Matter ◽  
Drinkable Water ◽  
Vacuum Uv

Cyanobacterial bloom events produce toxins and taste and odor issues, disturbing drinkable water quality. Vacuum UV (VUV) is a promising advanced oxidation process used to treat impacted water, with potential applicability in small and remote communities.

UV-advanced oxidation process for taste and odor removal – comparing low pressure and medium pressure UV for a full-scale installation in Korea

2015 ◽  
Vol 10 (1) ◽  
pp. 66-72 ◽  
Author(s):  
Jens Scheideler ◽  
Kyung-Hyuk Lee ◽  
Philipp Raichle ◽  
Taeyoung Choi ◽  
Hong Sung Dong
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Low Pressure ◽  
Pressure System ◽  
Medium Pressure ◽  
Taste And Odor

The Water Treatment Plant (WTP) located in South Korea is a 101,000 m³/d water treatment plant using flocculation/coagulation followed by sedimentation and sand filtration plus a final chlorination step to produce drinking water from a natural reservoir. The seasonal occurrence of taste and odor compounds were driving the need for an advanced treatment step. In 2010 the operator decided to carry out pilot tests to test the possibility of removing this compound with a low or medium pressure ultraviolet-based advanced oxidation process (AOP). The pilot test showed a significant lower electrical energy demand (EED) for the low pressure system (EED = 70 W/m³) compared to the medium pressure system (EED = 144 W/m³) to achieve a 0.5 LOG reduction of 2-methylisoborneol. The results of the pilot trials were the basis for the design of the full-scale system capable of treating up to 4,419 m³/h of drinking water using low pressure lamps.

Cytotoxicity reduction of wastewater treated by advanced oxidation process

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Water Quality ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Quality Parameters ◽  
Quality Parameter ◽  
Treated Wastewater ◽  
Water Quality Parameter ◽  
Textile Printing ◽  
Before And After

The degradation of printing dyes from textile printing industry effluents was carried out by Advanced Oxidation Process (AOP) in which heterogeneous photocatalytic treatment of textile printing wastewater using UV/H2O2/TiO2 system was studied. For the treatment of textile effluents different concentration of titanium dioxide (TiO2) and effect of application time of UV radiation was investigated. The degradation of treated wastewater was estimated spectrophotometrically. To check the extent of mineralization and decolorization after treatment water quality parameter such as percentage degradation, COD, BOD, TOC, pH, DO and toxicity were studied. Before treatment the values of water quality parameters were as; COD (1950 mg/L), BOD (963 mg/L), TOC (3410 mg/L), pH (9.6) and DO (1.77 mg/L). After application of UV/H2O2/TiO2 degradation was observed to be 72% and reduction in COD, BOD, TOC were 58%, 57%, 48%, and increase in DO level was up to 49% respectively. For the evaluation of the toxicity of photocatalyticaly treated wastewater, Allium cepa and brine shrimp test were also carried out before and after treatment of printing wastewater.

ZnO/UV/H2O2 Based Advanced Oxidation of Disperse Red Dye

2020 ◽  
Vol 234 (1) ◽  
pp. 129-143 ◽  
Author(s):  
Aneela Jamil ◽  
Tanveer Hussain Bokhari ◽  
Munawar Iqbal ◽  
Muhammad Zuber ◽  
Iftikhar Hussain Bukhari
Keyword(s):  
Water Quality ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Irradiation Time ◽  
Advanced Oxidation ◽  
Quality Parameters ◽  
Process Variables ◽  
Optimum Conditions ◽  
Initial Concentration ◽  
Red Dye

AbstractIn view of promising efficiency of advanced oxidation process, ZnO/UV/H2O2 based advanced oxidation process (AOP) was employed for the degradation of Disperse Red-60 (DR-60) in aqueous medium. The process variables such as concentration of catalysts, reaction time, pH, dye initial concentration and H2O2 dose were evaluated for maximum degradation of dye. The maximum degradation of 97% was achieved at optimum conditions of H2O2 (0.9 mL/L), ZnO (0.6 g/L) at pH 9.0 in 60 min irradiation time. The analysis of treated dye solution revealed the complete degradation under the effect of ZnO/UV/H2O2 treatment. The water quality parameters were also studied of treated and un-treated dye solution and up to 79% COD and 60% BOD reductions were achieved when dye was treated with at optimum conditions. The dissolved oxygen increased up to 85.6% after UV/H2O2/ZnO treatment. The toxicity was also monitored using hemolytic and Ames tests and results revealed that toxicity (cytotoxicity and mutagenicity) was also reduced significantly. In view of promising efficiency of UV/H2O2/ZnO system, it could possibly be used for the treatment of wastewater containing toxic dyes.

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