ADVANCED Recirculating Aquaculture Systems (RAS) Technology Workshop - Dec 5-7, 2017 University of California - Davis


About This Workshop


Aquaculture, as a business, seems to be able to capture the imagination of a wide variety of individuals worldwide. Recirculating aquaculture technology (systems that recondition and re-use water) is the latest sector in aquaculture to have attracted attention and considerable venture capital. This workshop is designed for a broad audience. We will seek to provide nonbiased, research-based information to those that are interested in, or those using recirculating aquaculture fish production systems. The information presented in this three-day workshop comes either from the firsthand research results and experiences of the presenters or those of collaborators or colleagues around the world. Workshop registration includes a technical workbook, access to applicable resource materials, break refreshments, and lunch each day. Bring your favorite calculator for design work!

About our Presenters


Dr. Thomas Losordo, Losordo & Associates, LLC
Dr. Tom Losordo is the Managing Partner at Losordo & Associates, LLC., after retiring in June 2017 as Principal Scientist and Chief Engineer for Pentair Aquatic Eco-Systems. Dr. Losordo has earned a Bachelor degree in Biology and a Master’s degree and Ph.D. in Agricultural Engineering. Involved in aquaculture for 40 years, he has extensive experience in the research, development, design, and implementation of recirculating aquaculture systems worldwide. Formerly with the Department of Biological and Agricultural Engineering at North Carolina State University, Dr. Losordo headed the program of applied research and demonstration known as the North Carolina Fish Barn. Dr. Losordo also provided aquacultural engineering support to citizens of North Carolina and beyond through the North Carolina Cooperative Extension Service.


Dr. Raul Piedrahita, Professor Emeritus, UC Davis
Dr. Raul H. Piedrahita recently retired from the University of California, Davis, where he was Professor and Chair in the Department of Biological and Agricultural Engineering. He is also a past Director of UC Davis' Center for Aquatic Biology and Aquaculture. Dr. Piedrahita's research interests are in the area of water quality and treatment in aquaculture: theory and practice of CO2 measurement and control, suspended solids characterization and control, biofiltration, and computer modeling of unit operations and systems. He is a founding member and past president of the Aquacultural Engineering Society.

Dennis Delong

Dennis DeLong, Pentair Aquatic Eco-Systems LLC
Mr. Dennis DeLong is Manager of Customer Advocacy with Pentair Aquatic Eco-Systems. Mr. DeLong has earned a Bachelor degree in Biology and a Master of Science degree in Management. He has been involved in both commercial aquaculture activities and research and development for 39 years. Prior to joining Pentair in July 2011, Mr. DeLong managed the research and demonstration activities within the North Carolina State University Fish Barn program. He provided extension assistance in aquaculture to citizens and agri-businesses in North Carolina for 20 years, including the design, construction, and operation of RAS facilities.

Topics to be Covered

• Critical Considerations in Recirculating Aquaculture Systems
• Tank Hydraulics and Settleable Solids Removal
• Suspended Solids Removal Technologies
• Nitrification Processes and Biofilter Components
• Aeration and Oxygenation Processes in Recirculating Aquaculture Systems
• Carbon Dioxide Control in Intensive RAS
• Fine and Dissolved Solids Removal: Foam Fractionation
• Denitrification in Aquaculture
• Planning and Building Recirculating Aquaculture Systems
• Management and Operation of Recirculating Aquaculture Systems
• Advancements in Solid Waste Capture and Treatment
• Disease Prevention and Control in Intensive Aquaculture Production
• UV Sterilization, Transmittance and Its Use in Disinfection
• Mass Balance Analysis and Recirculating Systems
• Biofilter Economics: Comparative Cost of Different Biofilter Types
• Production Considerations in RAS Design
• RAS Designs and Layouts
• Mass Balance Analysis and RAS
• Dynamic Modeling for RAS
• Feed, Waste Production, and Associated Calculations
• Estimating Required Flow Rates
• Sizing Biofilter Components, Oxygenation Components, and CO2 Removal Components
• Designing a Production System


Tuesday, December 5 – Thursday, December 7, 2017
8AM–5PM (Tue-Thur)


Silverado Vineyards Sensory Theater,
University of California - Davis
392 Old Davis Road
Davis, CA 95616


$400— Includes morning and afternoon breaks, lunch each day, and course materials. A workshop notebook containing a copy of the presentation slides will be provided for each participant. Access will be provided to an online folder with a number of spreadsheets and .pdf file publications. Ample time will be provided for questions during the workshop. Limited student registrations are available for $200, with valid student ID.

Promotional discounts, incentives, etc. can not be applied to workshop course rates.


Reservations are essential and only accepted with payment in full. Further details and registration available at


Hyatt Place UC Davis
173 Old Davis Road Extension
Davis, California, USA, 95616
+1 530.756.9500

Hallmark Inn Davis
110 F Street
Davis, CA, USA, 95616
+1 800.753.0035

To receive the workshop rate, please request 'Pentair Corporate Rate' when booking your accommodations.

Cancellation Policy: Registered attendees who cancel at least 30 days prior to the workshop will receive a full refund. Cancellations made 29 to 5 days before the start date result in a 75% refund. NO refund will be granted for cancellations made 4 to 0 days before the start date.

I hereby agree to the terms listed on this form and I grant my explicit permission to Pentair Aquatic Eco-Systems (“PAES”) and their affiliated companies, to use my name, my comments about the workshop (written and spoken) and my photo/video likeness in any future marketing and advertising materials; as well as in any other legal means. I hereby grant full copyright of photographs and other written materials from the workshop/course to Pentair Aquatic Eco-Systems and their affiliated companies, jointly with the right to reproduce said photos and materials fully or in part. I understand that commercial use of any written materials, videos or photos provided by PAES are strictly prohibited unless written authorization is provided by PAES. Video and/or audio recording of presentations is prohibited.

Register Online