Passive Self-Regulating Denitrification Technology for Aquaculture

Award Information
Agency: Department of Agriculture
Branch: N/A
Contract: 2004-33610-14420
Agency Tracking Number: 2004-00448
Amount: $77,267.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
108 Industrial Avenue, Jefferson, LA, 70121
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Douglas Drennan
 (504) 837-5575
Business Contact
 Catherine Drennan
Title: Member
Phone: (504) 837-5575
Research Institution
Commercial-scale marine aquaculture has the potential to close the gap between an increasing demand for high quality seafood products and marine fisheries near maximum sustainable yields. In flow through aquaculture systems, the release of nitrate to nearby streams, lakes, etc. can be detrimental to the ecology of the receiving water body. Similarly, in recirculating aquaculture and/or aquarium systems (RAS), high nitrate levels are toxic to many species. Therefore, the reduction of nitrate by denitrification is of major concern. Denitrification is normally achieved by adding methanol or a similar chemical to act as the necessary carbon source, which requires sophisticated computer monitoring and control systems. This project proposes to investigate the potential for using Polyhydroxyalkanotes (PHAs), a biodegradable biopolymer, produced from sugar fermentation, as an alternative carbon source for denitrification in recirculating aquaculture systems. The denitrification capability of PHA will be quantified and a predictive computer model will be developed for estimating PHA carbon release as a system design tool. Additionally, the commercial feasibility of employing PHAs as a simple, low-cost alternative to the relatively complex existing treatment methods will be investigated.

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

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