News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

nitrification

Aquafeeds

What is the best carbon-nitrogen ratio for biofloc systems?

A recent study at the Federal University of Rio Grande in Brazil showed that it is possible to reduce the C:N ratio in biofloc cultures, to decrease the water volume used and the total suspended solids produced, with resulting savings. 

Responsibility

TAN, other water quality factors affect nitrification rates in biofilters

An important criterion when studying biofilters is the conversion rate of total ammonia nitrogen (TAN) to nitrate-nitrogen in production water. Although nitrification rates have been based on media surface areas, they do not always reflect the actual nitrification achieved. Volumetric 

Health & Welfare

Beneficial microbes and pathogen control

A range of alternative products is available to improve animal health and water quality, and control pathogen loads. Beneficial microbes produce antimicrobial compounds and suppress pathogen proliferation. 

Health & Welfare

Product improves nitrification in RAS

Healthy populations of both ammonia- and nitrite-oxidizing bacteria must be present in aquaculture systems to support the nitrification of potentially toxic ammonia to nitrite, with further oxidation to less problematic nitrate. 

Responsibility

Nitrification rates in fluidized-bed filters

Study evaluates nitrification rates of three fluidized-bed filters, finding no significant changes in fluidization level as biofilm accumulated or was sheared off.