Dynamic Fish Manure Extractor System

Cleanliness in fish hatchery raceways is of the utmost importance when it comes to healthy fish. As an engineering team, our purpose is to design a system that can effectively reduce the build-up of fish manure on the bottom of the raceways without causing re-suspension of the manure in the water.

Background
Current techniques used to clean fish hatchery raceways take an unnecessary amount of time. Minimum wage workers spend hours upon hours cleaning fish manure out of the raceways, but are ineffective in doing so due to problems with re-suspension of fecal particles. Therefore, the lack of an efficient way to collect fish feces causes hazardous living conditions for the fish in the raceways as well as for the ecosystem where the hatchery discharges its water: the Snake River.

Previous Designs

 * A screen that is pushed across the bottom of the raceways to collect manure
 * A vacuum that cleans waste in the quiescent zone

Last Year's Design
Description

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 * Movable baffle design, tested with 0" baffle gap and 9" horizontal baffle

Client Needs
Our client requests a design that will accomplish the following needs:
 * Remove feces from the bottom of raceways without re-suspension of particles
 * Be durable (minimal maintenance)
 * Be easy to use (anyone can operate)
 * Be cost effective (less than our budget of $750)
 * Be simple (be replicable)

Siphon Filtration
Description

Pump Filtration
Description

Modified Baffle
Description