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Trout Production Effluent Challenges Tom Wiggins Vermont Department of Fish & Wildlife Obtaining a Discharge Permit Why did problems occur?? 1 Regulators did not understand fish culture or hatchery effluents. 2. Regulators were inexperienced. 3. Professional values not water quality standards impacted the process. Specific Effluent Challenges ( Current & Future) Phosphorus * This was the principal concern of VT DEC (Department of Environmental Conservation) * The proposed hatchery was well within existing standards, DEC was worried about mass loading * Tertiary treatment was required and three year study on the impact of the discharge Solids Not considered a problem pH •Hatcheries typically have little impact on pH Bacteriological * Fecal coliform & streptococci groups * Aeromonas & total bacteria * Fish pathogens Chemicals * Few chemicals available to use * The available chemicals are: - Generally considered safe or - FDA and EPA approved or - Used Under Permit (INAD) I am sure reasonable changes can be made to improve hatcheries effluents if it is approached in a manner of Mutual Understanding and Cooperation
