Ozone – Applications and Products

PLOVDIV – 01 December 2015

What is Ozone?

Molecular weight: 48 g/mol

Density @ 1013 mbar, 0°C: 2,14 kg/m³

Max. limit for ambient level: 0,1 ppm

0,2 mg/m³air

Odor threshold: 0,01 ppm

Redox potential: 2,07 V

Comparison of oxidants:

- Oxygen (mol.) 1,23 V

- Chlorinedioxide 1,27 V

- Chlorine 1,36 V

-  Hypochlorite 1,49 V

- Ozone 2,07 V

- OH radical 2,80 V

Blue, pungent and strong smelling gas

O(3)ZONE .. The Molecule

OZONE [greek = smelling]

Strongest oxidant, effective disinfectant ! Decomposition - generation on site only !

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A typical customer request …

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How does Ozone Work?

Ozone oxidation follows two pathways: –  Direct - Ozone contacting microorganism or contaminant –  Indirect - Ozone disintegrates into short living, stronger, hydroxyl radicals

Both reactions occur simultaneously

Since Chlorine is still a widely used and known chemical for oxidation and disinfection, Ozone is often compared to Chlorine

Ozone acts 3000 times faster than chlorine as a bactericide for Disinfection of E-coli

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Disinfection Mechanism Chlorine versus Ozone Bacterium structure

Chlorine must diffuse through cell wall to inactivate organism

Ozone lysis, rupture cell wall on contact to inactivate organism

DNA Nucleic acid

Cell wall

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Practical Example of Ozone as a Biocide Use of Chemical Biocide

Use of Ozone as Biocide Existing Biofilm is removed by ozone

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Example of the Oxidation Power of Ozone

O3 Oxidation

Raw Water O3 Treated Water

How do we make Ozone ?

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Oxygen containing feed gas (Air/LOX)

Free oxygen atoms and

oxygen molecules

Product gas: Ozone-Feedgas

mixture

Ozone production inside of an electrical field Energy (Ozone Generator) Generator

inlet Generator

outlet

Heat

Electrical Field

Electrical Field

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Design of an ozone plant Ozone destructors

Introduction-Reaction systems

Ozone Generators

Cooling Water supply

Measurement devices

Feedgas Supply

PLC and

SCADA

Ozone Generator – Portfolio

PDOevo Series

GSO Series

Containerized Solutions

SMOevo Series

Food and Beverage (Bottling Industry) Process water loops Small drinking water plants Aquaculture, Aquariums, Zoo Swimming pools Cooling water/towers Pilot or Laboratory systems

The GSO Series (3 – 400 g/hr) Our small scale ozone series. The main applications for this compact unit are:

OCS Unit

Small to Medium drinking water plants Cooling water/tower treatment Small to Medium waste water plants Industrial process water or wastewater treatment

The SMOevo Series (0.4 – 27,5 kg/hr) Our medium scale “workhorse” systems. The main applications for the SMOevo Series generators are:

1 Power Supply Unit 2 Operator Panel TP 177

3 Safety Pressure Switches

4 Safety Valve 5 Pressure Reducer 6 Gas Inlet Flange 7 Gas Inlet Filter 8 Gas Control Valve 9 Check Valve

10 Cooling Water Flow Meter 11 Cooling Water Inlet Flange 12 Ozone/Gas Outlet Flange 13 Ozone generator 14 Ozone Concentration Monitor optionally 15 Gas flow Meter 16 Air Conditioned Cabinet Door

Large drinking and waste water plants

Pulp Bleaching Large industrial wastewater plants

Industrial off-gas treatment

The PDOevo Series (20 – 300 kg/hr)

Our large scale ozone series. The main applications for PDOevo Series are:

Applications

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Laminating processes - i.e. laminating of TetraPak

Drinking water -  improvement of flocculation -  decoloration/taste/odor -  Fe/Mn elimination -  Disinfection -  TOC -elimination (i.e. THM´s) -  Elimination of endocrine substances

Process water -  cooling water (i.e. in power plants) -  swimming pools -  rinsing water in beverage industry -  etc.

Ozonolysis / Synthesis -  Synthesis of new products -  Modification of products

Product polishing - Improvement of viscosity i.e.starch) - Disinfection of food (i.e. salade) - etc.

Desodoration -  Oxidation of H2S (waste gases), -  Mercaptanes

Wastewater Treatment -  Elimination of COD -  Decolouration -  Elimination of Tensides -  Elimination of Phenoles -  Sludge Treatment -  Elimination of AOX -  Elimination of endokrine substances -  Detoxification -  Etc.

Bleaching -  Kaolin -  pulp

Applications for Ozone

Applications are one thing –

a sales opportunity is another

Parameters and parametric values as per 98/83/EC

Parameter   Parametric value Parameter   Parametric value

Escherichia coli (E. Coli)   0 / 100ml   Epichlorohydrin   0,10 µg/l  

Enterococci   0 / 100ml   Fluoride   1,5 mg/l  

Acrylamide   0,10 µg/l   Lead   10 µg/l  

Antimony   5,0 µg/l   Mercury   1,0 µg/l  

Arsenic   10 µg/l   Nickel   20 µg/l  

Benzene   1,0 µg/l   Nitrate   50 mg/l  

Benzo(a)pyrene   0,010 µg/l   Nitrite   0,50 mg/l  

Boron   1,0 mg/l   Pesticides   0,10 µg/l  

Bromate   10 µg/l   Pesticides — Total   0,50 µg/l  

Cadmium   5,0 µg/l   Polycyclic aromatic hydrocarbons   0,10 µg/l  

Chromium   50 µg/l   Selenium   10 µg/l  

Copper   2,0 mg/l   Tetrachloroethene and Trichloroethene   10 µg/l  

Cyanide   50 µg/l   Trihalomethanes   100 µg/l (total)  

1,2-dichloroethane   3,0 µg/l   Vinyl chloride   0,50 µg/l  

affected by Ozone

Indicator parameters and values as per 98/83/EC

Parameter   Parametric value Parameter   Parametric value

Aluminium   200 µg/l   Odour  Acceptable and no abnormal change  

Ammonium   0,50 mg/l   Oxidisability   mg/l O2  

Chloride   250 mg/l   Sulphate   250 mg/l  

Clostridium Perfringens (incl. spores)   0 / 100ml   Sodium   200 mg/l  

Colour  Acceptable to consumers and no abnormal change  

Taste  Acceptable to consumers and no abnormal change  

Conductivity   2500 µS/cm at 20°C   Colony count 22°C   no abnormal change  

Hydrogen ion concentration   ≥6,5 and ≤ 9,5 pH units   Coliform Bacteria   0 / 100ml  

Iron   200 µg/l   Total organic Carbon (TOC)   no abnormal change  

Manganese   50 µg/l   Turbidity  Acceptable to consumers and no abnormal change  

affected by Ozone

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Ozone for Drinking Water Treatment

World‘s Largest O3 System (PDO Series)

PDO Series – O3 System

COD Series - Ozone Destruct Units

Oxidation of metals as iron and manganese

Removal of color

Oxidation and removal of taste & odor Oxidation and removal of algae

Oxidation of Total Organic Carbon (TOC) Oxidation and reduction of contaminants

Primary disinfection

Oxidation of ammonia by nitrification

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Advanced Drinking Water Treatment Plant for Surface Water (without GAC)

flocculation basin

sedimentation basin

pre- oxidation PRE -OZONATION

chemicals

ozone contact tank clear water tank

INTER-OZONATION

Sand Filtration

Final desinfection CHLORINE

Case Study DWTP Langenau 37 years successful use of ozone

•  First ozone system in 1977 – 4 kg/h from air •  Extension 1991 – 2 x 10 kg/h from air •  Replacement of first unit 2005 – 22 kg/h from LOX

Rebuilding of the existing units with new instrumentation Elimination of inefficient thermal ozone destructors

•  Replacement of the second generation systems 2012/2013 2 x 12,5 kg/h from LOX

Case Study DWTP Langenau 37 years successful use of ozone

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- BASF AG - Installation of equipment (1 x 25 kg/h @ 12 wt%)

Process Water International companies trust WEDECO

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Clients: - chemical/ pharmaceutical companies - cosmetic - food processing

Application: - stabilise process water

- disinfection of water - avoid biofilms in pipes / surfaces - O3 + UV (residual ozone destruction)

Generator: Modular HC / GSO

OCS System

Summary - Benefits of Ozone

Well-proven Process

Has been used in water treatment for over hundred years

Safe Process

No chemical storage required

Redudant safety mechanisms to protect the system

Safety monitors for protection of labour

Easy Process By means of intelligent process controls automation to a large extend

Environmental process No chemicals No chlorinated by-products Oxygen as the only waste product

Economical process Considerable Efficiency increase within the last 30 years

By means of low maintenace & high quality systems

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End of presentation

Thanks for your interest !