Ozone for Treatment of Water for Reuse
Water reuse, especially from municipal wastewater treatment plants, is becoming an increasingly important for a variety of
applications. The presence of Trace Organic Compounds, primarily from pharmaceuticals and personal care products
are increasing in wastewater effluents. While the current levels do not seem to present a threat to human health
presently, forward looking utilities are studying processes that can be added to the current treatment train to reduce the
presence of these materials in the effluent streams. It has already been demonstrated that aquatic life can be and has
been effected by these compounds. So, there is strong interest in studying processes to treat these compounds.
The presence of the compounds in wastewater is due to two factors: The increased use of pharmaceuticals and
personal care products by consumers and because standard wastewater treatment processes are not effective in
removing these compounds. So, wastewater treatment plant operators are looking for polishing steps to remove these
compounds from the wastewater effluent
Reverse osmosis combined and UV/peroxide has been one treatment option used for water reuse. While effective for
removal of trace organic compounds concerns exist regarding discharge of concentrate, chemical costs and energy
requirements.
Ozone has recently become more interesting since it provides a comparable efficacy in removing trace organic
compounds to the UV/peroxide process without the need for chemical additions and lower energy costs. Ozone can
generate hydroxyl radicals via side reactions with compounds found in the wastewater creating an advanced oxidation
process. The ozone process can be optimized for trace contaminant removal, if necessary, with the addition of peroxide.
Ozone is also well know to public water utilities since it is used extensively for drinking water disinfection. It is also a well
known disinfecting agent for wastewater, especially in Europe. This is important for regulatory compliance, e.g. California
Title 22 requirements for recycled water.
Combining ozone with biological filtration may create the optimal method for removing the trace compounds with the
reduced presence of byproducts and lower toxicity. Ozone bio filtration is a process that is employed in pretreatment of
surface water for drinking water treatment. So, it is both familiar and reasonably well understood.
Water reuse, especially from municipal wastewater treatment plants, is becoming an increasingly important for a variety of
applications. The presence of Trace Organic Compounds, primarily from pharmaceuticals and personal care products
are increasing in wastewater effluents. While the current levels do not seem to present a threat to human health
presently, forward looking utilities are studying processes that can be added to the current treatment train to reduce the
presence of these materials in the effluent streams. It has already been demonstrated that aquatic life can be and has
been effected by these compounds. So, there is strong interest in studying processes to treat these compounds.
The presence of the compounds in wastewater is due to two factors: The increased use of pharmaceuticals and
personal care products by consumers and because standard wastewater treatment processes are not effective in
removing these compounds. So, wastewater treatment plant operators are looking for polishing steps to remove these
compounds from the wastewater effluent
Reverse osmosis combined and UV/peroxide has been one treatment option used for water reuse. While effective for
removal of trace organic compounds concerns exist regarding discharge of concentrate, chemical costs and energy
requirements.
Ozone has recently become more interesting since it provides a comparable efficacy in removing trace organic
compounds to the UV/peroxide process without the need for chemical additions and lower energy costs. Ozone can
generate hydroxyl radicals via side reactions with compounds found in the wastewater creating an advanced oxidation
process. The ozone process can be optimized for trace contaminant removal, if necessary, with the addition of peroxide.
Ozone is also well know to public water utilities since it is used extensively for drinking water disinfection. It is also a well
known disinfecting agent for wastewater, especially in Europe. This is important for regulatory compliance, e.g. California
Title 22 requirements for recycled water.
Combining ozone with biological filtration may create the optimal method for removing the trace compounds with the
reduced presence of byproducts and lower toxicity. Ozone bio filtration is a process that is employed in pretreatment of
surface water for drinking water treatment. So, it is both familiar and reasonably well understood.
Spartan Environmental Technologies
Air and Water Treatment
Air and Water Treatment
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Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com