If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Reducing the Nutrient Impacts of Aquaculture Through the Use of an Algal Photobioreactor Production System

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

Algal biofuel production is a promising solution for tackling nutrient pollution and energy and climate change challenges, due to algae's ability to utilize carbon dioxide from combustion processes, uptake nutrients from waste-streams and produce energy products. Florida has been identified as a favorable location for the development of algal biofuel production systems due to the climatic conditions and number and location of nutrient waste streams and combustion sources. This study examined the integration of an algal biofuel production system into Mote Aquaculture Research Park's (MAP) recirculating aquaculture system (RAS) in Sarasota, Florida, which includes a sturgeon hatchery and grow out farm that sustains approximately 180 metric tons of fish. In the proposed system, algae produced in photobioreactors using waste nutrients from the RAS would be anaerobically digested to produce energy in the form of methane and biosolids that could be used as fertilizer. Nutrients recovered from digester centrate and carbon dioxide from the combined heat and power (CHP) unit, would be recycled back to the algal photo-bioreactor. Anticipated outcomes include electricity production, reduction of nutrient (N and P) discharges to the environment and reduced chemical and energy costs for operating existing nutrient removal processes on site. The model developed estimated that 85% total nitrogen removal could be achieved in the algae photobioreactors and between ˜2,000 and 3,000 Wh electricity per kg algae could be produced through anaerobic digestion. An alternate scenario for energy production of generating biodiesel was also considered, which could provide between ˜3,000 and 7,000 Wh per kg algae; however significant technical challenges to biodiesel production must be overcome for implementation of this strategy. The model estimates were validated using nutrient removal and algae productivity data from prior studies carried out in our laboratory with Spirulena platensism grown on synthetic media. Our current research is directed at determining algal productivity rates in MAP's RAS water under natural lighting conditions and temperature and incorporating these rates into the model.

Keywords: Algae; aquaculture; biofuel; nutrient; removal; renewable energy; sustainability

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802867711

Publication date: January 1, 2011

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more