Control of bromate ion and brominated organic compounds formation during ozone/hydrogen peroxide treatment of secondary effluent

2006 ◽  
Vol 53 (6) ◽  
pp. 169-174 ◽  
Author(s):  
H.-S. Kim ◽  
H. Yamada ◽  
H. Tsuno
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
New Technologies ◽  
Secondary Effluent ◽  
H2o2 Treatment ◽  
Hydrogen Peroxide Treatment ◽  
Secondary Effluents

Ozonation and ozone process combined with hydrogen peroxide have been identified as new technologies for direct or indirect reuse of wastewater. This study aims to establish appropriate conditions to control the formation of BrO3- and brominated organic compounds during O3/H2O2 treatment of secondary effluents of sewage. When the H2O2/O3 mole ratio of injection was above 0.5 and the DO3 concentration was below 0.1 mg/L, BrO3- was controlled as well as treatment purpose was completed. TOBr formation in O3/H2O2 treatment was also completely controlled.

Acidic and hydrogen peroxide treatment of polyaluminum chloride (PACL) sludge from water treatment

2004 ◽  
Vol 50 (9) ◽  
pp. 99-105 ◽  
Author(s):  
J.H. Kwon ◽  
K.Y. Park ◽  
J.H. Park ◽  
S.H. Lee ◽  
K.H. Ahn
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfuric Acid ◽  
Water Treatment ◽  
Specific Resistance ◽  
Water Treatment Sludge ◽  
H2o2 Treatment ◽  
Polyaluminum Chloride ◽  
Fenton’S Reaction ◽  
Hydrogen Peroxide Treatment ◽  
H2o2 Oxidation

The water treatment sludge including coagulants cannot be easily removed by conventional dewatering methods. The possibility of hydrogen peroxide (H2O2) oxidation as a pretreatment to enhance the dewaterability of polyaluminum chloride (PACl) sludge from water works was investigated. H2O2 treatment alone was not effective but H2O2 treatment under acidic condition significantly reduced both the cake water content and specific resistance to filtration (SRF), indicating the enhancement of dewaterability and filterability. The filterability after acid/H2O2 treatment was comparable to polymer conditioning and even more dewatered cake than polymer conditioning was produced. By H2O2 combined with sulfuric acid (H2SO4), leached iron caused Fenton's reaction, which showed a potential to significantly reduce the amount of solids mass and to produce more compact cake with higher filterability.

scholarly journals Options and limitations of hydrogen peroxide addition to enhance radical formation during ozonation of secondary effluents

2014 ◽  
Vol 5 (1) ◽  
pp. 8-16 ◽  
Author(s):  
U. Hübner ◽  
I. Zucker ◽  
M. Jekel
Keyword(s):  
Hydrogen Peroxide ◽  
Treatment Options ◽  
Radical Formation ◽  
Secondary Effluent ◽  
Soil Aquifer Treatment ◽  
Batch Experiments ◽  
Efficient Removal ◽  
Potable Reuse ◽  
Secondary Effluents ◽  
Pre Treatment

The oxidation of secondary effluent with ozone and O3/H2O2 (peroxone) was evaluated in batch experiments as pre-treatment for soil aquifer treatment for non-potable reuse purposes. The addition of hydrogen peroxide improved the reduction of ozone-resistant compounds with an optimized radical formation at 0.5 mol H2O2/mol O3. However, the improvement of radical formation was shown to be limited to approximately 30–40% independent from ozone dosage. Also a preozonation step did not accelerate efficiency of subsequent peroxone treatment. Thus, other treatment options, such as an increase of ozone dosages, need to be considered for more efficient removal of ozone-resistant compounds. However, the peroxone process might still be a promising option for oxidation of bromide containing effluents, since a reduction of bromate formation can allow the application of higher ozone dosages.

An in vitro senescence model of gingival epithelial cell induced by hydrogen peroxide treatment

Odontology ◽  
2021 ◽  
Author(s):  
Sarita Giri ◽  
Ayuko Takada ◽  
Durga Paudel ◽  
Koki Yoshida ◽  
Masae Furukawa ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Epithelial Cell ◽  
Gingival Epithelial Cell ◽  
Hydrogen Peroxide Treatment

Destruction of Pollutants and Microorganisms in Water by UV Light and Hydrogen Peroxide

1992 ◽  
Vol 27 (1) ◽  
pp. 57-68 ◽  
Author(s):  
D.W. Sundstrom ◽  
B.A. Weir ◽  
T. A. Barber ◽  
H. E. Klei
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Chemical Structure ◽  
Uv Light ◽  
Liquid Films ◽  
Strong Interactions ◽  
Order Kinetic ◽  
E Coli ◽  
Order Kinetic Model ◽  
Catalyzed Oxidation

Abstract This project investigated the destruction of organic compounds and microorganisms in water by ultraviolet catalyzed oxidation using hydrogen peroxide as the oxidizing agent. The combination of UV light and hydrogen peroxide was effective in decomposing all of the organic compounds studied. The rates of destruction increased with increasing peroxide concentration and UV light intensity, and were highly dependent on chemical structure. The destruction of mixtures of organic compounds showed strong interactions between reacting components. The inactivation of E. coli and B. subtilis spores by UV light and/or hydrogen peroxide was studied in flat plate reactors. By using thin liquid films, the combination of UV light and peroxide greatly increased the rates of inactivation of both microorganisms. The results were correlated by a mixed second order kinetic model.

Coagulation of textile secondary effluents with Fenton's reagent

1997 ◽  
Vol 36 (12) ◽  
pp. 215-222 ◽  
Author(s):  
Shyh-Fang Kang ◽  
Huey-Min Chang
Keyword(s):  
Hydrogen Peroxide ◽  
Cod Removal ◽  
Color Removal ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Effluent Standards ◽  
Secondary Effluents ◽  
Removal Efficiencies

This study was designed to use both artificial and real textile secondary effluents to evaluate (1) the COD and color removal efficiencies for ferrous coagulation and Fenton's coagulation, and (2) the feasibility of using hydrogen peroxide to improve ferrous coagulation to meet more stringent effluent standards. The results indicate that the optimum pHs for both ferrous coagulation and Fenton's preoxidation processes range between 8.0–10 and 3.0–5.0, respectively. The rate for color removal is faster than that for COD removal in the Fenton's preoxidation process. The removals of COD and color are mainly accomplished during Fenton's preoxidation step. The ratio of COD removal for Fenton's coagulation versus ferrous coagulation, given the same ferrous dosage, ranges from 1.4 to 2.3, and it ranges from 1.1 to 1.9 for color removal, using two effluent samples. Therefore, using hydrogen peroxide can enhance the ferrous coagulation, and this ensures more stringent effluent standards of COD and color are met.

Hydrogen Peroxide Treatment of Muscle Fibres Inhibits the Formation of Myosin Cross-Bridges

2018 ◽  
Vol 166 (2) ◽  
pp. 183-187 ◽  
Author(s):  
P. V. Kochubei ◽  
G. V. Kopylova ◽  
D. V. Shchepkin ◽  
S. Yu. Bershitskii
Keyword(s):  
Hydrogen Peroxide ◽  
Muscle Fibres ◽  
Hydrogen Peroxide Treatment ◽  
Cross Bridges
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