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Systems in Use for Arcata Wastewater Treatment Plant

27 bytes removed, 05:18, 6 May 2008
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#Yearling ponds
#Adult Fish Hatchery ponds
[[Image:rearing pen.jpeg]]
*This is accomplished by a pump at the headgates that controls water salinity as well as a forced air pump that helps regulate dissolved oxygen and screens water for dangerous compounds.
*Prior to 1991 the systems were all closed, but with the addition of numerous pipes connecting the ponds, it is now a continuously flowing system.
*Having visited the wastewater treatment plant myself, I better understand the process of water treatment and area surrounding the plant, better known as the Marsh. I recommend to anyone who wants a better understanding of the entire operation, to visit the area in person.
==Fish Hatchery SystemSystems==The growth cycle of the fish at the marsh is as follows:
#Egg incubators
#Recirculating Rearing Pens
#Adult fish ponds
#Release or transportation for continued use
 
 
==Systems==
Each stage of the Hatchery has specific guidelines that must be followed to achieve maximum output of fish and maximum fish health. During each stage of fish life, different conditions are needed, and they are simulated through the different environments described below.
===Egg Incubators===
*The system used involves uses trays of eggs that are constantly being treated with flowing water.*The water is drawn from a 500 gallon resevoir thats located underground.*Water exiting the system as well as returning to the resevoir is ran run through filration systems to insure that dissolved organic material is removed from the system.
===Rearing Pens===
*Fry and Fingerlings (fish development stages) are kept in rearing pens under a 2000 gallon recirculating system.
*Sterilizing and filtration system are in place to ensure water quality and fish health.
*Two chamber plastic lined tanks are used to hold the fish, they also include rocks and oyster shells to provide mimic natural habitat reenactment.
===Yearling Ponds===
*Here the fish are in ponds where they reach the smolt stage of life, preparing to become an adult.
 
===Adult Ponds===
*Pond one and pond two are both used to house the adult fish which have made it through the adolecent stages of growth, they are the largest ponds and have the largest fish.
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