Intensive system biofilter provides effective suspended solids treatment
Authors found the biofilter unit portion of the Intensive Bioproduction Korean system originally developed for nitrification can remove suspended solids.
Plastic tanks compare well to concrete in trout trial
In a study comparing U-shaped plastic culture tanks to concrete raceways in a 31-week grow-out of trout fingerlings showed the plastic tanks offered lower costs, easy modification, transportability and reduced labor for cleaning.
HISTAR development
The Hydraulically Integrated Serial Turbidostat Algal Reactor (HISTAR) developed at Louisiana State University superimposes contaminant control techniques on a continuous algal production system.
Phytoplankton in aquaculture ponds
Aquaculture ponds typically have ideal conditions for the growth of various species of phytoplankton. Green algae are considered most desirable in freshwater ponds.
Chlorine an effective disinfectant in aquaculture
Ponds should be fertilized a few days after chlorine application to encourage the regrowth of natural food organisms before introducing postlarvae.
Lingcod stock enhancement under study as management tool in U.S. Pacific Northwest
The authors have begun a project to further investigate stock enhancement as a tool for rebuilding depleted lingcod stocks in Puget Sound in Washington, USA.
Tilapia culture in Lake Kariba, Zimbabwe
Lake Kariba, on the Zambia-Zimbabwe border, has no industry, few people, high-quality freshwater and an average year-round temperature of 27 degrees-C, all features that can support aquaculture.
Temperature fluctuations affect biofilter performance in preliminary study
In a recent study, the authors set up a series of temperature-controlled tanks to determine the effects of temperature variation on biofilter performance.
Advancing shrimp farm technologies support greater efficiencies, sustainability
Todays' shrimp farm technologies include biosecurity protocols, stocking densities according to pond design and aeration levels, and best practices for pond preparation and feed and water management.
The changing face of pond aquaculture in China
Pond aquaculture in China is trending further from traditional carp polyculture toward monoculture of higher-value fish species.
Pond bottom soil analyses
Limit pond soil analyses to soil particle size for use in pond construction decisions, initial analysis of total sulfur, occasional analyses of total nitrogen, and routine analyses of pH and soil organic carbon.
Direct energy use in channel catfish production
The direct energy input values for aquaculture include energy used in constructing facilities, producing seedstock and feed, powering mechanical aerators, applying feed and harvesting and processing culture animals.
Membrane biological reactor technology supports wastewater reclamation reuse
Membrane biological reactor technology is a scalable wastewater treatment system that reclaims water discharged from RAS solids-collection devices.
Carbon dioxide: Waste, nutrient
Carbon dioxide is both a nutrient and a waste product in aquaculture. Some pond managers feel that application of organic matter to provide additional carbon dioxide can reduce pH and control blue-green algae.
Carbon-nitrogen balance impacts nitrogen removal
For aquaculture managers, it is important to control carbon type and carbon-nitrogen ratio by feed formulation, solids removal or addition of organic carbon.
Oxygen sources for aquaculture farms
As stocking density increases in aquaculture systems, supplemental oxygen becomes necessary. Oxygen generation is becoming a popular option.