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Protein skimmers in recirculation systems

Protein skimmers in recirculation systems

Effec­ti­ve water tre­at­ment in aquacul­tu­re can­not be done without the work of bac­te­ria, becau­se in spe­cial­ly built bio­fil­ters they often con­vert toxic excre­ments of the fish into ani­mal and envi­ron­ment­al­ly friend­ly sub­s­tan­ces. Howe­ver, if bac­te­ria are pre­sent in lar­ger num­bers in the bea­ring tank, they can cau­se unde­s­i­ra­ble side effects. The­re­fo­re, in clo­sed recir­cu­la­ti­on sys­tems, a pro­te­in skim­mer is used in addi­ti­on to bio­lo­gi­cal filters.

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First step in water treatment: The drum filter

First step in water treatment: The drum filter

Almost ever­yo­ne has done this at least once in their own four walls: For examp­le, you use a sie­ve and water and sim­ply rin­se the dirt away, lea­ving only the clean salad at the end. This is a type of mecha­ni­cal clea­ning that almost ever­yo­ne uses regu­lar­ly. In order to achie­ve a simi­lar effect in a recir­cu­la­ting aquacul­tu­re sys­tem (RAS), a com­pa­ra­ble fil­ter opti­on is used in a figu­ra­ti­ve sen­se: the drum fil­ter, a cylind­ri­cal drum cove­r­ed with a fine-mesh fil­ter net. Learn more about this smart fil­ter tech­no­lo­gy in our blog post!

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Automation of fish farming systems

Automation of fish farming systems

The topic of auto­ma­ti­on is beco­m­ing more and more important, espe­cial­ly in today’s world. Espe­cial­ly in indus­try, whe­re high pro­duc­ti­vi­ty is always the goal and pro­ces­ses are incre­a­singly digi­ta­li­zed (Indus­try 4.0), many dif­fe­rent app­li­ca­ti­ons of auto­ma­ti­on can be found. In our blog­post we exp­lain in detail, how pro­gramm­a­ble logic con­trol­lers can be used in recir­cu­la­ti­on sys­tems and how pro­ces­ses and workload can be optimized.

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Efficient oxygen input by flow pump

Efficient oxygen input by flow pump

​Each spe­ci­es of fish has its own pre­fe­ren­ces for per­fect flow con­di­ti­ons: some fish spe­ci­es pre­fer per­ma­nent cur­r­ents and „surf“ in them, others only move to spawn in cur­r­ents and others pre­fer to live in calm waters. The back­ground is the oxy­gen demand that every…

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Sedimentation in detail

Sedimentation in detail

Sedi­men­ta­ti­on is part of the water fil­tra­ti­on in our cir­cu­la­ti­on sys­tem. But what exact­ly is it respon­si­ble for and how does it work? In the blog post we go into more detail about the com­po­nent and exp­lain how water loss in recir­cu­la­ti­on sys­tems can be mini­mi­zed through smart recovery.

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Recirculating aquaculture systems (RAS)

Recirculating aquaculture systems (RAS)

The cul­ti­va­ti­on of fish on land has been great­ly opti­mi­zed over the past cen­tu­ries. In par­ti­cu­lar, the clo­sed recir­cu­la­ting aquacul­tu­re sys­tem (RAS) has now estab­lis­hed its­elf along­side tra­di­tio­nal aquacul­tu­re methods such as pond sys­tems, net cages and flow-through sys­tems. In order to get a con­cre­te over­view of the dif­fe­ren­ces bet­ween the­se methods, the cha­rac­te­ris­tics of tech­no­lo­gi­cal recir­cu­la­ting aquacul­tu­re sys­tems are com­pa­red with tra­di­tio­nal bree­ding methods. In addi­ti­on, the SEAWATER Cube is used to exp­lain the con­struc­tion of an inno­va­ti­ve clo­sed recir­cu­la­ti­on sys­tem in detail in the indi­vi­du­al pro­cess steps.

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Microbiology and technology of denitrification

Microbiology and technology of denitrification

In clo­sed aquacul­tu­re – e.g. in sys­tems with a water exchan­ge of less than 10% per day – the use of deni­tri­fi­ca­ti­on is essen­ti­al. Deni­tri­fi­ca­ti­on con­verts the nitra­te (NO3) con­ver­ted from fish excre­ments (ammonium/ammonia) during nitri­fi­ca­ti­on with the help of spe­cial bac­te­ria, the so-cal­­led deni­tri­fiers. Mole­cu­lar nitro­gen (N2) is for­med from the nitra­te in the absence of oxy­gen, which then escapes from the plant in gas­eous form. We exp­lain the most important details about deni­tri­fi­ca­ti­on in aquacul­tu­re systems.

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Fish farming tank

Fish farming tank

The cen­tral com­po­nent of an aquacul­tu­re faci­li­ty is the fish far­ming tank. Its dimen­si­ons and capa­ci­ty influ­ence both which fish spe­ci­es can be held and the annu­al pro­duc­tion volu­me. But what are the dif­fe­rent types of fish tanks and which spe­ci­es are kept in our faci­li­ty? In our blog post we give a short overview.

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Cohort model

Cohort model

Alrea­dy in the Midd­le Ages, mon­ks divi­ded their carp ponds into sec­tions of dif­fe­rent sizes. Even today, the sepa­ra­ti­on of the far­med fish into so-cal­led cohorts is still used. But what is this divi­si­on actual­ly good for? The basic idea behind the cohort model is to…

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