Abstract Good water quality in recirculating aquaculture systems (RAS) is crucial for ensuring the successful growth and survival of reared species. So far, there are no regulations which parameters should be measured RAS, each farmer decides to follow. Traditionally, have been at certain intervals with handheld sensors laboratory analyses, can labour intensive. Currently, a variety monitoring equipment available, even real‐time parameters. Internet Things‐based artificial intelligence...

Abstract Saprolegniosis, also called water mould, induces a cotton or wool‐like white growth on fish skin. It can kill at all stages of life, from eggs to adults. is caused by oomycetes the genus Saprolegnia and causes mortality huge financial losses farms hatcheries. species are endemic ubiquitous in freshwater habitats around world. The exposing factors for saprolegniosis still largely unknown, but stressors such as temperature shocks, poor quality, handling high density have been...

Recirculating aquaculture system (RAS) is an increasingly popular alternative to open production systems. However, off-flavours and odours can accumulate in the fish flesh from circulating water decrease meat quality. Off-flavours are typically caused by geosmin (GSM) 2-methylisoborneol (MIB) that lipophilic compounds formed as secondary by-products of bacterial metabolism. Even though GSM MIB not toxic, they often disliked consumers, both have very low human sensory detection limits....

Aquaponics is a technique where recirculating aquaculture system (RAS) and hydroponics are integrated to grow plants fish in closed system. We investigated if the growth of rainbow trout (Oncorhynchus mykiss) baby spinach (Spinacia oleracea) would be affected coupled aquaponic compared RAS or hydroponic system, all systems as three replicates. also possible effects on onset nitrification biofilters concentration off-flavor-causing agents geosmin (GSM) 2-methylisoborneol (MIB) flesh spinach....

Many types of lignocellulosic biomass show effective binding toxic heavy metals from industrial and environmental effluents. Biosorption is an emerging option for conventional methods to remove metals, some them with even better efficiencies compared methods. Raw material biosorption typically low-cost easily available, including agricultural waste or forest residues such as sawdust, bark, needles. This review concentrates on the accumulation by biosorbents. Thus far, has not been...

The recirculating aquaculture system (RAS) is an ever-developing technology for producing fish with a low environmental impact. However, off-flavors can be major problem in RAS production. Off-flavor compounds are of microbial origin and accumulated flesh. They typically cause musty earthy taste odor, which consumers find unacceptable. Here we hypothesized that oxidizing such as ozone (O3), hydrogen peroxide (H2O2), their combinations, referred to advanced oxidation processes (AOP)s, remove...

European whitefish Coregonus lavaretus has increasingly become an important species for aquatic food production, especially in the Nordic countries. Whitefish is produced traditional cage and pond operations, recirculating aquaculture system (RAS) which, unfortunately, off-flavors odors, mostly caused by geosmin (GSM) 2-methylisoborneol (MIB), can accumulate fish flesh from circulating water. GSM MIB have very low human sensory detection limits and, therefore, often disliked consumers even...

Recirculating aquaculture systems (RAS) discharge management limits the development of sector, because RAS do not automatically result in low nutrient emissions. Research has helped develop such as wetlands and woodchip bioreactors that have been adopted by Danish commercial model trout farms. To further concept, we modelled built a novel "zero-discharge" recirculating system with an annual capacity approximately 14 tonnes. The aim this paper is to describe entire concept present results...

Abstract In recirculating aquaculture system (RAS), ammonium excreted by the fish is typically transformed to less toxic nitrate microbial activity in bioreactors. However, nitrate-nitrogen load can be harmful for receiving water body when released from RAS facility. A new type of treatment a was designed, including passive woodchip denitrification followed sand filtration introduced into side-loop an experimental RAS, rearing rainbow trout ( Oncorhynchus mykiss ). process, woodchips acted...

In recirculating aquaculture systems (RAS), off-flavors that accumulate in fish muscle tissue can be problematic terms of consumer acceptance and the reputation farmed products. Although are not toxic at low concentrations, they often give earthy, muddy, or other unwanted flavors. Traditionally, muddy caused by geosmin (GSM) 2-methylisoborneol (MIB) have been detected, but a variety compounds flavors also identified. this study, method based on solid phase micro extraction (SPME) coupled...

Woodchip bioreactors are used to carry out nitrate removal of nutrient-rich aquaculture effluents via denitrification. In certain conditions, greenhouse gases (GHG)s nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) may be formed which have high global warming potentials (N2O 265 298 times CH4 28 that CO2). This study focused on monitoring the GHGs (N2O, CO2, CH4) at woodchip bioreactor, treating recirculating water a system (RAS) rearing rainbow trout (Oncorhynchus mykiss) for...

ABSTRACT Partial recirculating aquaculture systems (PRASs) aim for combining the benefits of flow‐through (water use approximately 50,000 L kg −1 feed) and (RASs, 500–1000 feed). While water quality is usually excellent in systems, large volumes good are required. In RAS, investment production costs can be high, due to microbial actions typically occurring off‐flavours occur accumulate fish flesh. Here, an evaluation between three renewal rates (4000, 2000 1000 a PRAS was performed....

For a recirculating aquaculture system (RAS), passive water treatment was designed for efficient discharge nutrient removal and reuse in RAS production. Denitrification woodchip bioreactor filled with birch wood (Betula pendula) followed by sand filtration introduced into side-loop of an experimental rearing rainbow trout (Oncorhynchus mykiss). efficiency remained high (96%) throughout the experiment reached nitrogen rate 15 g NO3-N m-3 per day. Sand used to remove dissolved particulate...

Abstract Concentrations of pharmaceuticals, consisting four anti-inflammatory and one antiepileptic drug, were studied in the aqueous solid phase municipal sewage sludge, collected from a wastewater treatment plant (WWTP) central Finland. The samples included untreated sludge biological treatment, digested before after composting. First, taken as grab to study bioavailable part but also fraction. Later, long-term concentrations by passive sampling with styrene divinylbenzene-reverse...

Fish is increasingly produced in recirculating aquaculture systems (RAS), which can offer some production and environmental benefits. Unfortunately, there a tendency to develop off-flavors RAS, mainly caused by geosmin (GSM) 2-methyl isoborneol (MIB) accumulating the fish flesh from circulating water. These are objectionable consumers, reducing profitability of causing an unwanted reputation for this sector. In study, combinations oxidative chemicals: ozone (O3), hydrogen peroxide (H2O2),...

Recirculating aquaculture systems (RAS)s have become important in land-based fish production. Unfortunately, RAS-farmed accumulate off-flavors their flesh. Off-flavor compounds geosmin (GSM) and 2-methylisoborneol (MIB) are lipophilic concentrations need to be controlled RAS. Therefore, a useful area of study would the expected impact total lipid contents fatty acids on accumulation these off-flavor compounds. The objective this research was relationships between compounds, acids, both at...