Improved Aquaculture Wastewater Treatment Through Application of Polyacrylamide

Award Information
Agency: Department of Agriculture
Branch: N/A
Contract: 2001-33610-10456
Agency Tracking Number: 2001-00360
Amount: $56,911.00
Phase: Phase I
Program: SBIR
Awards Year: 2001
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
P.O. Box 706, 115 13th Ave. S., Buhl, ID, 83316
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Douglas Ramsey
 (208) 837-6191
Business Contact
 J.Wayne Courtney
Title: Executive Vice President
Phone: (208) 543-6421
Research Institution
Aquaculture wastewater management presents unique problems in treatment technology. Current methods employ settling of biosolids (fish and uneaten feed) as the primary means of treating aquaculture wastewater. Due to their fragile nature and constant contact with water, biosolids break into smaller sizes during waste collection. The suspended solid fraction, which requires more time to settle out, is carried into other rearing ponds of the receiving stream instead of being piped into offline settling basins. These solids represent a significant impact to receiving streams. Polyacrylamide (PAM) is effective in reducing soil and associated nutrient losses in irrigated agriculture by complexing soil particles to increase settling rate. PAM has also been shown to reduce bacteria and may reduce dissolved nutrients in wastewater. We propose to identify appropriate PAM products and determine concentrations which cost-effectively improve water quality of aquaculture waste supernatant through improved settling efficiency of fish waste. Reductions in suspended solids, phosphorus, nitrogen, BOD, and bacteria will be quantified in treated test solutions of fish waste. Phosphorus leach rates from treated solids and residual PAM levels in supernatants will be determined.

* Information listed above is at the time of submission. *

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