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Project ID: HI701

Title: Removal of nitrogenous aquaculture wastes by a wind-powered reverse osmosis system

Focus Categories: Nitrate Contamination, Waste Water

Keywords: Nitrogen, aqculture waste, membrane, reverse osmosis, water reuse

Start Date: 03/01/2001

End Date: 02/28/2003

Federal Funds: $18,749

Non-Federal Matching Funds: $38,539

Congressional District: First

Principal Investigator:
Clark C.K. Liu
Professor, University of Hawaii at Manoa


Tilapia is a major source of protein around the world, and tilapia farming is the fastest growing segment of aquaculture in the United States. Over the last year, domestic tilapia production reached 15-20 million pounds. Rapid accumulation of nitrogenous wastes is one of the major operational problems of aquaculture operation of fresh water tilapia. As a result, water in a fishpond must be replaced regularly to maintain its water quality. In the mean time, wastewater from the fishpond must be treated to meet the stringent effluent water quality standards. In this project, a water re-circulating system for tilapia aquaculture will be developed and tested, which will use a wind-powered reverse osmosis system to remove nitrogenous wastes produced in a fish tank and reuse the treated wastewater as a fresh water supply. It will lead to a cost-effective and environmental-friendly aquaculture operation

Progress/Completion Report PDF

U.S. Department of the Interior, U.S. Geological Survey
Maintained by: John Schefter
Last Updated: Thursday June 24, 2004 3:18 PM
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