The Chastagner lab at
Washington State University, Puyallup plans to develop a biofiltration
testing facility and determine the effectiveness of several techniques
for removing P. ramorum inoculum from water. Methods similar to
those being used for remediating stormwater are being considered for
removing pathogen inoculum from nursery runoff and will have the added
advantage of removing pollutants. These methods will consist of
biofilters using various organic substrates, constructed wetlands or
rain gardens, and physical methods such as sand filtration or
sedimentation. Pilot biofiltration systems will be installed at selected
P. ramorum-positive nurseries in Washington and be part of a
training program for nursery managers. A Best Management Practices
workshop will also be held for nursery managers regarding the
installation and maintenance of cost-effective biofiltration systems for
removal of Phytophthora inoculum in water. Funding for the
project has been made possible by the Farm Bill and the Washington State
Department of Agriculture Nursery Research Program.
From Sept. 2012 COMTF newsletter
Questions? Comments? Email Marianne Elliott
Hi, I love your writing. I'd like to say. All wastewater treatment plants use disinfection for tertiary treatment to reduce pathogens, which are micro-organisms which can pose a risk to human health. Chlorine is usually dosed into the treated wastewater stream for disinfection. However, Bolivar uses large ponds in which sunlight and other micro-organisms reduce the pathogens. Additional treatment may be required if the treated wastewater is reused for purposes such as irrigation of food crops or where close human contact may result.
ReplyDeleteTertiary treatment, such as that provided at Bolivar through the Dissolved Air Flotation Filtration (DAFF) plant, produces a much higher standard of treated wastewater suitable for these purposes. The DAFF plant filters and disinfects the wastewater from the ponds allowing it to be used for direct irrigation of crops through the Virginia Pipeline Scheme.
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surface water purification