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.
Authors found the biofilter unit portion of the Intensive Bioproduction Korean system originally developed for nitrification can remove suspended solids.
The Hydraulically Integrated Serial Turbidostat Algal Reactor (HISTAR) developed at Louisiana State University superimposes contaminant control techniques on a continuous algal production system.
Aquaculture ponds typically have ideal conditions for the growth of various species of phytoplankton. Green algae are considered most desirable in freshwater ponds.
Ponds should be fertilized a few days after chlorine application to encourage the regrowth of natural food organisms before introducing postlarvae.
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.
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.
In a recent study, the authors set up a series of temperature-controlled tanks to determine the effects of temperature variation on biofilter performance.
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.
Pond aquaculture in China is trending further from traditional carp polyculture toward monoculture of higher-value fish species.
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.
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 is a scalable wastewater treatment system that reclaims water discharged from RAS solids-collection devices.
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.
For aquaculture managers, it is important to control carbon type and carbon-nitrogen ratio by feed formulation, solids removal or addition of organic carbon.
As stocking density increases in aquaculture systems, supplemental oxygen becomes necessary. Oxygen generation is becoming a popular option.
Iron supplementation of pond fertilizers can improve their effectiveness in promoting phytoplankton growth. Ferrous iron in bottom sediment precipitates hydrogen sulfide gas produced by microbial activity.