Montreal Study Indicates Antidepressants In Water Affecting Fish Suggest Ozone Treatment

A controlled study involving brook trout exposed to varying amounts of effluent Montreal water over a three-month period at the University of Montreal showed that fish exposed to antidepressants in the water showed a reduction in brain activity. Significant quantities of antidepressants are finding their way into the water around Montreal and affecting the fishes’ tissue and brain activity. The study also showed that antidepressant drugs accumulate in fish tissues.

The study revealed ozone treatment reduces the level of antidepressants in the waste water as it leaves the plant. Montreal is experimenting with ozone wastewater treatment. The study shows the phenomenon is likely found around many cities in the world because Montreal has a typical sewage-treatment system.

While antidepressant levels in wastewater do not pose a risk to human it does have an impact on fish in particular and the ecosystem in general. This should be a concern for everyone. Other pharmaceuticals like hormones have been shown to change the gender of fish. The wastewater treatment system for Las Vegas is adopting ozone to minimize the risk of these compounds. Other cities, like Montreal, are looking into this as well.


Sanata Barbara to Add Ozone Water Treatment

The City of Santa Barbara is getting a $29 million loan to install an ozone water treatment system at the Cater Water Treatment Plant to comply with federal drinking water standards. Because the cities of Montecito and Carpinteria water customers will also benefit from this process, their water agencies will be responsible for approximately 40 percent of the costs.

The system is designed to remove potential carcinogens in the water created when sunlight interacts with natural organic matter such as leaves, twigs, and other vegetation. Ozone is an excellent oxidant for water treatment since it is short lived int eh environment and does not create toxic byproducts as some other oxidizing chemicals, such as chlorine, can do.


Louisville Looking to Add Ozone Water Treatment

Riverbank Filtration is an advanced treatment for drinking water. Currently, Louisville Water is renovating its Crescent Hill Filtration Plant to exceed new drinking water regulations that take effect in 2012. As the science of drinking water advances, Louisville Water will look to add ozone as an advanced water treatment technology at its Crescent Hill Plant by 2014 and may consider Riverbank Filtration around 2020.