Spartan Environmental Technologies
www.SpartanWaterTreatment.com
www.SpartanWaterTreatment.com
Spartan Environmental Technologies, L.L.C.
7383 Lauren J Dr
Mentor, OH 44060
USA
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Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@ spartanwatertreatment.com
7383 Lauren J Dr
Mentor, OH 44060
USA
Return to Previous Page
Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@ spartanwatertreatment.com
DESOZONE System
The DESOZONE system can deodorize 200
to 20,000 m3/h of air from industrial facilities
and municipal sewage plants. The system is
a complete packaged unit that includes: the
blower, washing system with packing,
recycling pump of wash water solution (if
necessary with chemicals), ozone mixing
devices, ozone generator and control panel.
The DESOZONE system can deodorize 200
to 20,000 m3/h of air from industrial facilities
and municipal sewage plants. The system is
a complete packaged unit that includes: the
blower, washing system with packing,
recycling pump of wash water solution (if
necessary with chemicals), ozone mixing
devices, ozone generator and control panel.
General Information
A serious problem for sewage plant operations is the generation of foul smelling odors,
especially when they are located within a residential area. Studies have shown that air
pollution from odors is the greatest problem that these installations must deal with and for
which they receive the most complaints from the local population.
The substances responsible for the odors in the vicinity of treatment plants are generally
gaseous inorganic products or highly volatile organic compounds. The inorganic
substances are mainly the result of biological activity in the sewage treatment process,
the latter are often caused by the presence of industrial wastes in the sewer. Compounds
such as mercaptans, skatoles, aldehydes, ketones and inorganic acids are recognized as
being among the causes of bad-smelling odors at the outlet of sewer lines and in
treatment plants. In general these compounds contain nitrogen or sulphur atoms.
Ammonia and hydrogen sulfide are considered to be the main causes of foul odors.
Hydrogen sulphide is considered to be the main cause when the sewage comes mainly
from households. Its presence is related to the onset of putrefaction in reducing
environments characterized by low values of the oxidation-reduction potential.
Defining an air washing system requires a precise definition of the quality and quantity of
the air to be treated and the size of the particles involved. Significant factors in designing
odor elimination system are:
Regarding the size of particles, there are three forms of micro-pollutants which can cause
foul odors:
- solid: particles from 0.1 to 100 μm
- liquid: particles from 0.01 to 10 μm
- gaseous: coming from chemical or thermal reaction.
To eliminate the micro-pollutants in the air, the carrier gas (air) is washed with an
oxidizing reagent. The process is called “chemical scrubbing”. The DESOZONE process
uses ozone as oxidizer because it is much more efficient than the other chemical oxidants.
The optimum system involves a basic (sometimes acid) absorption process and oxidizer.
The system contact is critical in order to assure the correct gas-liquid transfer and the
chemical reactions; a poor gas-liquid transfer process will prevent complete elimination of
the odors.
With an experience base of many deodorization projects already successfully completed,
O.E.I. can ensure safe and effective designs for the most complicated systems. The plant
configuration uses horizontal scrubbers that are well suited for the most environments.
In the scrubber a diluted caustic soda solution is the washing fluid. This eliminates bad-
smelling acid molecules such as hydrogen sulfide and mercaptans. Adding an oxidiser to
the scrubbing liquid will also make it possible to oxidise the other bad-smelling
compounds at the same time. The scrubbing liquid is distributed uniformly in the scrubber
by means of spray nozzles with the liquid which is continuously renewed.
Ozone is introduced as gas into a fraction of the scrubbing fluid under the pressure from
the ozone generator. A special static mixer mixes the oxidizer with the liquid to be
oxidized.
The plant is equipped with level controllers (on the scrubbing liquid containment tank as
well as the basic solution storage tank) that permit addition of make-up water and prevent
the system from running dry.
The pH of the liquid system is controlled by means the pH probe and its signal is
transmitted to the dosing pump which maintains the pH at the defined value.
A serious problem for sewage plant operations is the generation of foul smelling odors,
especially when they are located within a residential area. Studies have shown that air
pollution from odors is the greatest problem that these installations must deal with and for
which they receive the most complaints from the local population.
The substances responsible for the odors in the vicinity of treatment plants are generally
gaseous inorganic products or highly volatile organic compounds. The inorganic
substances are mainly the result of biological activity in the sewage treatment process,
the latter are often caused by the presence of industrial wastes in the sewer. Compounds
such as mercaptans, skatoles, aldehydes, ketones and inorganic acids are recognized as
being among the causes of bad-smelling odors at the outlet of sewer lines and in
treatment plants. In general these compounds contain nitrogen or sulphur atoms.
Ammonia and hydrogen sulfide are considered to be the main causes of foul odors.
Hydrogen sulphide is considered to be the main cause when the sewage comes mainly
from households. Its presence is related to the onset of putrefaction in reducing
environments characterized by low values of the oxidation-reduction potential.
Defining an air washing system requires a precise definition of the quality and quantity of
the air to be treated and the size of the particles involved. Significant factors in designing
odor elimination system are:
- type of odor
- concentration
- temperature
- specific oxidizer dose
- contact chamber retention time
- waste water acceptability criteria
- type of scrubbing system
Regarding the size of particles, there are three forms of micro-pollutants which can cause
foul odors:
- solid: particles from 0.1 to 100 μm
- liquid: particles from 0.01 to 10 μm
- gaseous: coming from chemical or thermal reaction.
To eliminate the micro-pollutants in the air, the carrier gas (air) is washed with an
oxidizing reagent. The process is called “chemical scrubbing”. The DESOZONE process
uses ozone as oxidizer because it is much more efficient than the other chemical oxidants.
The optimum system involves a basic (sometimes acid) absorption process and oxidizer.
The system contact is critical in order to assure the correct gas-liquid transfer and the
chemical reactions; a poor gas-liquid transfer process will prevent complete elimination of
the odors.
With an experience base of many deodorization projects already successfully completed,
O.E.I. can ensure safe and effective designs for the most complicated systems. The plant
configuration uses horizontal scrubbers that are well suited for the most environments.
In the scrubber a diluted caustic soda solution is the washing fluid. This eliminates bad-
smelling acid molecules such as hydrogen sulfide and mercaptans. Adding an oxidiser to
the scrubbing liquid will also make it possible to oxidise the other bad-smelling
compounds at the same time. The scrubbing liquid is distributed uniformly in the scrubber
by means of spray nozzles with the liquid which is continuously renewed.
Ozone is introduced as gas into a fraction of the scrubbing fluid under the pressure from
the ozone generator. A special static mixer mixes the oxidizer with the liquid to be
oxidized.
The plant is equipped with level controllers (on the scrubbing liquid containment tank as
well as the basic solution storage tank) that permit addition of make-up water and prevent
the system from running dry.
The pH of the liquid system is controlled by means the pH probe and its signal is
transmitted to the dosing pump which maintains the pH at the defined value.