This document discusses ozone technology for wastewater treatment. It provides background on ozone and its properties as a strong oxidizing agent. Ozone can effectively disinfect and destroy pathogens and harmful chemicals in wastewater. The document reviews several actual case studies where ozone treatment improved wastewater quality by removing bacteria, organic compounds, metals, and toxicity. Advanced oxidation processes that combine ozone with other treatments like hydrogen peroxide or UV light are also discussed. The conclusion emphasizes that ozone works best as part of a combined treatment approach tailored to the specific wastewater.
COD reduction of aromatic polluted waste water by Advanced Oxidation Process ...Wade Bitaraf
In most petrochemical complexes and oil refineries the wastewater contains the aromatic compounds among which Benzene, Toluene, Ethyl Benzene and Xylene (BTEX) have harmful effects on environment and human health. The present work mainly deals with the UV-based advanced oxidation processes (AOPs), UV/H2O2 were tested in batch reactor systems to evaluate the removal efficiencies and optimal conditions for the photodegradation of BTEX in order to wastewater treatment. The efficiency of this method was analyzed by evaluating the Chemical Oxygen Demand (COD) as a pollution criterion through the COD reactor. The influence of the basic operational parameters such as initial concentration of H2O2, pH, Temperature, irradiation time and UV amount on the photo degradation of BTEX were also studied. The oxidation rate of BTEX and respectively the reduction rate of COD were low when the oxidation was carried out in the absence of H2O2 or UV light. The addition of proper amount of hydrogen peroxide improved the degradation, while the excess hydrogen peroxide could quench the formation of hydroxyl radicals (•OH). The optimal conditions of suspended slurry with 1.11(g/l) initial concentration of H2O2 and pH value of 3.1 were obtained under three UV lights illumination (6 W). Under the optimal conditions, COD reduction during the initial period of 180 min in UV/H2O2 systems reached about 90%.
Degradation of Ethanolamine by Fluidized-bed Fenton ProcessOswar Mungkasa
prepared by J. Anotai*,**, C.M. Chen***, L. Bellotindos**** and M.C. Lu*** Department of Environmental Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand (E-mail: jin.ano@kmutt.ac.th) ** National Center of Excellence for Environmental and Hazardous Waste Management (NCE-EHWM), Chulalongkorn University, Bangkok, Thailand *** Department of Environmental Resources Management, Chia-Nan Univer for Urban Environments in Asia, 25-28 May 2011, Manila, Philippines. organized by International Water Association (IWA).
COD reduction of aromatic polluted waste water by Advanced Oxidation Process ...Wade Bitaraf
In most petrochemical complexes and oil refineries the wastewater contains the aromatic compounds among which Benzene, Toluene, Ethyl Benzene and Xylene (BTEX) have harmful effects on environment and human health. The present work mainly deals with the UV-based advanced oxidation processes (AOPs), UV/H2O2 were tested in batch reactor systems to evaluate the removal efficiencies and optimal conditions for the photodegradation of BTEX in order to wastewater treatment. The efficiency of this method was analyzed by evaluating the Chemical Oxygen Demand (COD) as a pollution criterion through the COD reactor. The influence of the basic operational parameters such as initial concentration of H2O2, pH, Temperature, irradiation time and UV amount on the photo degradation of BTEX were also studied. The oxidation rate of BTEX and respectively the reduction rate of COD were low when the oxidation was carried out in the absence of H2O2 or UV light. The addition of proper amount of hydrogen peroxide improved the degradation, while the excess hydrogen peroxide could quench the formation of hydroxyl radicals (•OH). The optimal conditions of suspended slurry with 1.11(g/l) initial concentration of H2O2 and pH value of 3.1 were obtained under three UV lights illumination (6 W). Under the optimal conditions, COD reduction during the initial period of 180 min in UV/H2O2 systems reached about 90%.
Degradation of Ethanolamine by Fluidized-bed Fenton ProcessOswar Mungkasa
prepared by J. Anotai*,**, C.M. Chen***, L. Bellotindos**** and M.C. Lu*** Department of Environmental Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand (E-mail: jin.ano@kmutt.ac.th) ** National Center of Excellence for Environmental and Hazardous Waste Management (NCE-EHWM), Chulalongkorn University, Bangkok, Thailand *** Department of Environmental Resources Management, Chia-Nan Univer for Urban Environments in Asia, 25-28 May 2011, Manila, Philippines. organized by International Water Association (IWA).
Applicability of Fenton Process for Treatment of Industrial Effluents: A ReviewIJERA Editor
Wastewater and effluent treatment has undergone innovative changes over the years. Traditional wastewater treatment has yielded to modern and path-breaking procedures which are more efficient and effective. The world of difficulties and unknown has opened new avenues and paths to highly feasible effluent treatment procedures, so the vigorous importance of advanced oxidation procedures. This review paper will delineate the increasing importance of various advanced oxidation processes including Fenton treatment for wastewater. Advanced oxidation processes (AOP’s), which involve and includes the in-situ generation of highly potent chemical oxidants such as the hydroxyl radical, have emerged as an important avenue of technologies to accelerate the non-selective oxidation and thus the destruction of a wide range of non-degradable organic contaminants in wastewater which cannot be eliminated biologically. Advanced oxidation processes (AOP) are technologies based on the generation of highly reactive species, the hydroxyl radicals, used in oxidative degradation procedures for organic compounds dissolved or dispersed in aquatic media. These processes are promising alternatives for decontamination of media containing dissolved recalcitrant organic substances, which would not be efficiently removed by conventional methods.
Advanced oxidation processes to recover reverse osmosis cleaning watersacciona
Marina Arnaldos, responsable de desalación de desalación y nuevas tecnologías de ACCIONA Agua, presentó la ponencia “Advanced oxidation processes to recover reverse osmosis cleaning waters for irrigation purposes” en la conferencia anual que la asociación europea de desalación ha celebrado en Roma entre los días 22-26 de mayo de 2016.
Oxidation of Acetaminophen by Fluidized-bed Fenton Process: Optimization usin...Oswar Mungkasa
prepared by M.C. Lu*, R.M. Briones**, and M.D.G. de Luna**, *** *Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan (E-mail: mmclu@mail.chna.edu.tw) ** Environmental Engineering Graduate Program, University of the Philippines, 1011 Diliman, Quezon City, Philippines (Email: rowenambriones@yahoo.com) *** Department of Chemical Engineering, University for Urban Environments in Asia, 25-28 May 2011, Manila, Philippines. organized by International Water Association (IWA).
CH-3. Anaerobic treatment of wastewaterTadviDevarshi
Anaerobic treatment process, Effects of pH, temperature and other parameters on anaerobic treatment, Concept of anaerobic contact process, anaerobic filter, anaerobic fixed film reactor, fluidized bed and expanded bed reactors and up flow anaerobic sludge blanket (UASB) reactor.
Electro-oxidation And Its Feasibility In Wastewater TreatmentSakib Shahriar
Electro-oxidation (EO) is one of the advanced oxidation processes (AOP) used in wastewater treatment. It is also called anodic oxidation. In this presentation, we can learn about the working principle, industrial applications, types of electrodes, and catalysts in the EO process. The advantages and disadvantages are described later. The main advantages of electro-oxidation are the formation of low sludge and large percentages of organic matter degradation. But the main drawbacks occur due to the requirement of large space and expense. EO is used in many types of wastewater treatment. Degradation of methyl orange azo dye in a recirculation flow plant system, treatment of wastewater containing aromatic amines, endocrine disruptors treatment, domestic water, industrial wastewater, synthetic dye effluent, olive mill wastewater, pulp mill wastewater, citric acid wastewater.
Biochemical Process as a means to Control and Mitigate Industrial Wastewate...Mohammad Dain Shah Munna
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University of Chittagong
Applicability of Fenton Process for Treatment of Industrial Effluents: A ReviewIJERA Editor
Wastewater and effluent treatment has undergone innovative changes over the years. Traditional wastewater treatment has yielded to modern and path-breaking procedures which are more efficient and effective. The world of difficulties and unknown has opened new avenues and paths to highly feasible effluent treatment procedures, so the vigorous importance of advanced oxidation procedures. This review paper will delineate the increasing importance of various advanced oxidation processes including Fenton treatment for wastewater. Advanced oxidation processes (AOP’s), which involve and includes the in-situ generation of highly potent chemical oxidants such as the hydroxyl radical, have emerged as an important avenue of technologies to accelerate the non-selective oxidation and thus the destruction of a wide range of non-degradable organic contaminants in wastewater which cannot be eliminated biologically. Advanced oxidation processes (AOP) are technologies based on the generation of highly reactive species, the hydroxyl radicals, used in oxidative degradation procedures for organic compounds dissolved or dispersed in aquatic media. These processes are promising alternatives for decontamination of media containing dissolved recalcitrant organic substances, which would not be efficiently removed by conventional methods.
Advanced oxidation processes to recover reverse osmosis cleaning watersacciona
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Oxidation of Acetaminophen by Fluidized-bed Fenton Process: Optimization usin...Oswar Mungkasa
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4. Pathogen & harmful chemicals in wastewater
Pathogens and harmful chemicals in wastewater can
cause problems in ecosystem.
So, disinfection and destruction of harmful chemicals is
needed.
Disinfection technologies
1) UV 2) Chlorine 3) Ozone
4
BACKGROUND
Viruses Bacteria Protozoa Helminths Phenol Cyanide
5. Comparison
Criteria UV radiation Ozone Chlorine
Harmful byproducts NO NO YES
Environmental impact LOW LOW HIGH
Bacteria removal SOME YES YES
Virus removal NO YES SOME
Lead removal NO YES NO
Manganese removal NO YES SOME
Iron removal NO YES YES
Odor removal NO YES YES
Color removal NO YES SOME
Operational cost MED LOW MED
Capital cost MED HIGH MED
Maintenance HIGH MED MED
5
BACKGROUND
(Marianne, 1997)
6. What is ozone
O3
Unstable structure -> High reactivity
Pale blue gas
Distinctively pungent smell
INTRODUCTION
6
7. Much higher solubility into water than O2
Strong oxidizing agent
Easy to produce with air or oxygen gas and electricity
Ozone’s strength
INTRODUCTION
7
● Oxygen
Reactions :
1) O2 + e → 2O + e
2)O2 + O + M → O3
water
O2
O3
1)
2)
O3 109mg/L ≫ O2 18mg/L at 25℃
(Ozone solutions, 2014)
8. pH dependence of dissolved ozone
Dissolved O3 has pH dependence.
In basic environment, ozone decomposes rapidly.
And OH-radicals are produced.
OH-radical is the strongest oxidant.
The higher pH, the more OH-radicals.
INTRODUCTION
8
(Lenntech, 2010)
13. Ozone treatment system is placed at the end of
wastewater treatment system.
ACTUAL CASES
Ozone treatment system
13
Wastewater treatment system
14. Disinfection performance
14
Coliform : E.coli-like
(Hoveid H. et al, 2008)
ACTUAL CASES
Bacteria totally removed in 10 min. of contact time and
with 1ppm of ozone concentration
16. COD removal performance
16
(Preethi V. et al, 2009)
ACTUAL CASES
COD of tannery effluent decreases by ozonation.
COD removal efficiency is related to concentration of
ozone and pH.
17. AOP (advanced oxidation process)
AOP is a set of chemical treatment procedure to remove
organic materials in wastewater by oxidation through
reactions with the strongest oxidant ·OH.
Better than ozonation alone
Combinations
1) O3/H2O2 : peroxonation
2) O3/UV : ozone photolysis
3) H2O2/UV
4) H2O2/Fe2+/UV
17
(Mehmet A. et al, 2014)
.
.
.
AOP
18. Peroxonation (O3/H2O2)
Reaction
H2O2 accelerates the decomposition rate of O3.
It produces a larger number of very reactive ·OH
radicals.
Peroxonation process is more efficient than ozonation
alone.
Essential step of disinfection
18
AOP
(Mehmet A. et al, 2014)
19. Ozone photolysis (O3/UV)
Reaction
Effective on eliminating various volatile chlorinated
organic compounds
ex) CHCl3, CCl4, trichloroethylene(TCE) etc.
19
(Mehmet A. et al, 2014)
AOP
20. AOP in Petrochemical wastewater treatment
190 tons/months of phenolic wastes disposes by petrochemicals,
pharmaceuticals, and polymer industries.
2-Nitrophenol(2NP) is a main pollutant from petrochemical
wastewater.
Shokri applied ozone to degrade 2NP.
Ozonation at high pH (pH = 9) generates OH-radical rapidly. (=AOP)
20
(Shokri A., 2015)
AOP
Removal rate (%)
2NP 99.8
TOC 31
COD 72.5
21. Coking wastewater treatment
O3 & H2O2/O3 is applied to remove cyanide from coking wastewater.
Oxidation process is combined with coagulation-flocculation-
decantation and lime-soda ash softening pretreatment.
Using lower concentrations of ozone, cyanide is not removed.
Ozone consumption without softening pretreatment is twice as much
as that with softening pretreatment because wastewater contains
bicarbonate ions.
21
(Pueyo N. et al, 2016)
COMBINED TREATMENT
22. Textile wastewater treatment
Textile wastewater contains acute toxic chemicals.
Pazdzior et al studied the effect of ozonation & biodegradation on
toxicity.
Ozonation is combined with aerobic biodegradation.
22
(Pazdzior K. et al, 2016)
COMBINED TREATMENT
Toxicity removal
O3 →Bio 76.2 – 92.2%
Bio→ O3 93.7 – 94.2%
Bio→ O3 →Bio ~ 96%
raw
O
3
Bio
O
3
→Bio
Bio
→
O
3
Bio
→
O
3
→
Bio
Toxicity after treatment
23. Oilfield wastewater treatment
3 steps to enhance biodegradability of oilfield produced water(OPW)
1. Microwave demulsification : to remove oil
2. Ozone oxidation : to enhance the biodegradability of wastewater
3. Biological aerated filter : aerobic digestion
BOD5/COD shows the biodegradability of wastewater.
The optimum ozone treatment condition
- Dosage : 7mg/L
- Contact time : 15min
23
(Kang J. et al, 2015)
Parameter Initial value
pH 6.6
COD (mg/L) 648
BOD5 (mg/L) 45
BOD5/COD 0.07
Oil (mg/L) 68
TPH (mg/L) 76
SO4
2- (mg/L) 34
NH3-N (mg/L) 52
PS (mg/L) 589
TSS (mg/L) 3,346
Microtoxicity (EC50, %) 8.6
▶Charateristics of OPW
(Rajakovic V. et al 2006)
COMBINED TREATMENT
24. Oilfield waster treatment
Result
After biological treatment, effluent satisfies Chinese discharge
standard.
Ozone decomposes complex chemicals biodegradable.
24
(Kang J. et al, 2015)
Parameter Initial value After microwave treatment After ozonation
COD (mg/L) 648 382 260
BOD5 (mg/L) 45 21 86
BOD/COD 0.07 0.08 0.33
Oil (mg/L) 68 25 16
TPH (mg/L) 76 28 18
NH3-N (mg/L) 52 43 37
PS (mg/L) 58 58 12
Microtoxicity (EC50, %) 8.6 8.8 31
COMBINED TREATMENT
25. Conclusion
Ozone can degrade various types of chemicals or microbe with its
strong oxidizing power.
Many studies proved that ozonation is effective not only on
municipal wastewater but also on industrial wastewater.
pH of wastewater and concentration of ozone is important on
effectiveness of ozonation.
Basic environment(>pH 7) is favorable for ozonation.
Lower concentration of ozone may not be effective.
Ozonation can need pretreatments according to condition of
wastewater.
Ozonation shows better performance when it is combined with
other water treatment technologies.
25
CONCLUSION