Membrane filtration: Emerging technology removes fine solids from recirculating systems
While membrane filtration is not a cost-effective alternative to coarse solids removal processes, it has potential niche applications.
Grow-out studies of summer flounder at the University of North Carolina Wilmington evaluated microbead media as a biofilter in recirculating systems.
While membrane filtration is not a cost-effective alternative to coarse solids removal processes, it has potential niche applications.
Chemical fertilizers are frequently used in pond aquaculture to stimulate phytoplankton productivity and enhance the availability of natural food organisms.
Acidification due to excavation and aeration of acid sulfate soil causes recurrent production losses and low yields in brackish water aquaculture.
Negative impacts from uncontrolled populations of phytoplankton can provide a major production challenge in pond aquaculture systems used for catfish.
Organic matter – including fertilizers, unconsumed feed and feces of culture animals – settles to pond bottoms, often with a negative impact on water quality.
The United States Environmental Protection Agency published draft aquaculture effluent guidelines in the Federal Register.
The use of integrated mariculture systems incorporating seaweed biofilters addresses the impact of discharges, promoting more sustainable production.
Tilapia play an important role in rural aquaculture in Asia, but their potential for significantly greater contribution is constrained.
An adequate understanding of autotrophic and heterotrophic bacteria is important to design and manage many aquaculture operations.
It behooves us to understand land and water use issues and understand the differences between aquaculture and traditional agriculture.
With a crisis in coffee prices, small-scale tilapia producers in Central America see growing the fish as a lifeline and source of livelihood.
Fish culture has a relatively long history in Cameroon. Expanding aquaculture helps alleviate poverty and supply food where fish is the main source of protein.
There is increasing interest in low-salinity shrimp culture in inland areas because it is thought that disease control is easier to implement.
Shrimp and fish farmers frequently apply liming materials to ponds to increase the pH of bottom soils, elevate alkalinity and water hardness and improve conditions for microbial activity and benthic animals.
Natural waters uninfluenced by high biological activity seldom have pH above 8.5, but in fish or shrimp culture, pond pH levels can rise to 9 or higher.