Trivsel på fritiden skaper også et godt klima for gode leveranser på jobben. Daglig leder Flemming G. Wessman er fra sitt fødeland Island arvelig utstyrt med interesse for det gode måltid. Her har han økonomidirektør Jon Gotfredsen(t.v.) og prosjektleder Claes Sjölin på besøk.

For land-based fi sh farms, Recirculation Aquaculture Systems

(RAS) provide signifi cant advantages towards fl ow through

systems. Excellent water quality, rich water quantities and

preservation of temperature are all key factors to provide good

health and optimal growth conditions for fi sh.

Kaldnes™ RAS plants are tailored for optimum conditions

related to fi sh species, degree of recirculation, fi sh tank

confi guration and source of raw water. Components that

typically will be removed in a Kaldnes™ RAS plant include

organic matter, total ammonium nitrogen (TAN), suspended

solids, CO2, N2 and harmful bacteria/ virus. They will also

provide optimum conditions related to pH and alkalinity.

Kaldnes™ RAS solutions are being used for both fresh- and

saltwater systems.

A full range of solutions:

� Recirculating Aquaculture

Systems (RAS) – up to

99.99% reuse

� Treatment of intake water

� Conditioning of water

during production in fl ow

through systems

� Treatment of effl uent water

from fi sh farms

� Sludge treatment

� Treatment of water and

waste from fi sh abattoir

and processing

Kaldnes™ MBBR The Moving Bed Biofi lm Reactor (AnoxKaldnes™ MBBR technologies) is our own proprietary technology, and the biological engine of Kaldnes™ RAS. The MBBR technology allows the microorganisms to grow on sheltered, surfaces inside moving, plastic carriers creating a continuous biofi lm process without any risk for clogging and without any need for back fl ushing. Advantages like low head loss and high volumetric capacity make the process compact and well suited for treatment of large water fl ows. The process is very robust and easily operated with a minimum need for maintenance.

Hydrotech drum fi lters Biomass from the Kaldnes™ MBBR process, fi sh faeces and excess feed is effi ciently separated with Hydrotech drum fi lters, another well known Veolia Water Solutions & Technologies’ technology in the industry.

The Hydrotech fi lters have a high hydraulic capacity, are easy to operate and provide apredictable results. Typical mesh sizes are 40-90 micron, but can be delivered with mesh sizes down to 10 micron.

Intake water treatment Kaldnes™ RAS off er systems for preparation of intake water where the treatment may typically include one or more of the following unit processes:

� Solids removal (Filtration)

� Disinfection

� Alkalinity and pH adjustment

� Biological treatment

� CO2 and N2 stripping

� Oxygenation

Water conditioning in fl ow through systems Elevated CO2 concentrations and marginal O2 levels are the main challenge in fl ow through systems. This has a negative impact on fi sh welfare and growth rate. With more intensive and stable production, Krüger Kaldnes off ers cost-eff ective systems for CO2 stripping and aeration.

Effl uent water treatment from fi sh farms and abattoir waste Wastewater from fi sh farms and production plants constitutes pollutants that may harm the receiving water resources. Treatment of discharges is hence often a necessity to ensure sustainability of fi sh production facilities. Effl uent treatment will typically constitute processes for removal of major pollutants such as organic matter, suspended solids, ammonia nitrogen and bacteria/virus. Krüger Kaldnes off ers a wide range of treatment solutions for these objectives.

Typical unit processes may include: � Biological treatment � Solids removal � Disinfection

Sludge treatment Sludge and waste from fi sh farm facilities typically comprises biomass from bio-logical treatment, fi sh faeces, feed waste, dead fi sh and abattoir waste.

Krüger Kaldnes off ers solutions for: � Storage� Stabilization� Hygienization� Dewatering

Krüger Kaldnes has developed a range of concepts for sludge handling at fi sh farms and fi sh processing sites. The diff erent systems are adapted to each individual site based on quantity and quality of raw sludge, local regulations and transportation- and end user requirements. All of Krüger Kaldnes’ sludge treat-ment systems focus on high quality, low energy and simple operation with low requirements for maintenance.

transportation- and end user requirements. All of Krüger Kaldnes’ sludge treat-ment systems focus on high quality, low energy and simple operation with low transportation- and end user requirements. All of Krüger Kaldnes’ sludge treat-ment systems focus on high quality, low energy and simple operation with low

Other processes provided in KaldnesTM RAS plants may include oxygenation, ozonation, UV disinfection,

CO2removal, N2 removal and alkalinisation. KaldnesTM RAS provides highly compact and energy

effi cient solutions with focus on easy operation and low maintenance requirements.

For more than 20 years, Krüger Kaldnes has supplied the aquaculture

industry with solutions and technologies for high quality water treatment.

Our Kaldnes™ Moving Bed process is used in a large number of fi sh farms

all over the world and is today the leading technology for biological water

treatment within the industry.

Krüger Kaldnes is part of Veolia Water Solutions & Technologies comprising

world class technical know how and technologies for water purifi cation. As

such Krüger Kaldnes off ers a wide range of solutions that can be tailored to

meet the highest standards providing prime quality, energy effi ciency and

operational friendly water treatment systems.

www.krugerkaldnes.nopost@krugerkaldnes.nophone: +47 91 60 80 00NORWAY

State-of-the-Art Solutions and Technologies