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Protein skimmers in recirculation systems
EffecÂtiÂve water treÂatÂment in aquaculÂtuÂre canÂnot be done witÂhout the work of bacÂteÂria, becauÂse in speÂciÂalÂly built bioÂfilÂters they often conÂvert toxic excreÂments of the fish into aniÂmal and enviÂronÂmenÂtalÂly friÂendÂly subÂsÂtances. HoweÂver, if bacÂteÂria are preÂsent in larÂger numÂbers in the beaÂring tank, they can cauÂse undeÂsiÂraÂble side effects. TheÂrÂeÂfoÂre, in cloÂsed recirÂcuÂlaÂtiÂon sysÂtems, a proÂteÂin skimÂmer is used in addiÂtiÂon to bioÂloÂgiÂcal filters.
First step in water treatment: The drum filter
Almost everÂyoÂne has done this at least once in their own four walls: For examÂpÂle, you use a sieÂve and water and simÂply rinÂse the dirt away, leaÂving only the clean salad at the end. This is a type of mechaÂniÂcal cleaÂning that almost everÂyoÂne uses reguÂlarÂly. In order to achieÂve a simiÂlar effect in a recirÂcuÂlaÂting aquaculÂtuÂre sysÂtem (RAS), a comÂpaÂraÂble filÂter optiÂon is used in a figuÂraÂtiÂve senÂse: the drum filÂter, a cylindÂriÂcal drum coverÂed with a fine-mesh filÂter net. Learn more about this smart filÂter techÂnoÂloÂgy in our blog post!
Automation of fish farming systems
The topic of autoÂmaÂtiÂon is becoÂming more and more important, espeÂciÂalÂly in today’s world. EspeÂciÂalÂly in indusÂtry, wheÂre high proÂducÂtiÂviÂty is always the goal and proÂcesÂses are increÂasingÂly digiÂtaÂliÂzed (IndusÂtry 4.0), many difÂfeÂrent appliÂcaÂtiÂons of autoÂmaÂtiÂon can be found. In our blogÂpost we explain in detail, how proÂgrammaÂble logic conÂtrolÂlers can be used in recirÂcuÂlaÂtiÂon sysÂtems and how proÂcesÂses and workload can be optimized.
Efficient oxygen input by flow pump
​Each speÂciÂes of fish has its own preÂfeÂrenÂces for perÂfect flow conÂdiÂtiÂons: some fish speÂciÂes preÂfer perÂmaÂnent currÂents and „surf“ in them, others only move to spawn in currÂents and others preÂfer to live in calm waters. The backÂground is the oxyÂgen demand that every…
Sedimentation in detail
SediÂmenÂtaÂtiÂon is part of the water filÂtraÂtiÂon in our cirÂcuÂlaÂtiÂon sysÂtem. But what exactÂly is it responÂsiÂble for and how does it work? In the blog post we go into more detail about the comÂpoÂnent and explain how water loss in recirÂcuÂlaÂtiÂon sysÂtems can be miniÂmiÂzed through smart recovery.
Recirculating aquaculture systems (RAS)
The culÂtiÂvaÂtiÂon of fish on land has been greatÂly optiÂmiÂzed over the past cenÂtuÂries. In parÂtiÂcuÂlar, the cloÂsed recirÂcuÂlaÂting aquaculÂtuÂre sysÂtem (RAS) has now estabÂlished itsÂelf alongÂside traÂdiÂtioÂnal aquaculÂtuÂre methods such as pond sysÂtems, net cages and flow-through sysÂtems. In order to get a conÂcreÂte overÂview of the difÂfeÂrenÂces betÂween theÂse methods, the chaÂracÂteÂristics of techÂnoÂloÂgiÂcal recirÂcuÂlaÂting aquaculÂtuÂre sysÂtems are comÂpared with traÂdiÂtioÂnal breeÂding methods. In addiÂtiÂon, the SEAWATER Cube is used to explain the conÂsÂtrucÂtion of an innoÂvaÂtiÂve cloÂsed recirÂcuÂlaÂtiÂon sysÂtem in detail in the indiÂviÂduÂal proÂcess steps.
Microbiology and technology of denitrification
In cloÂsed aquaculÂtuÂre – e.g. in sysÂtems with a water exchÂanÂge of less than 10% per day – the use of deniÂtriÂfiÂcaÂtiÂon is essenÂtiÂal. DeniÂtriÂfiÂcaÂtiÂon conÂverts the nitraÂte (NO3) conÂverÂted from fish excreÂments (ammonium/ammonia) during nitriÂfiÂcaÂtiÂon with the help of speÂcial bacÂteÂria, the so-calÂÂled deniÂtriÂfiers. MoleÂcuÂlar nitroÂgen (N2) is forÂmed from the nitraÂte in the absence of oxyÂgen, which then escapes from the plant in gasÂeous form. We explain the most important details about deniÂtriÂfiÂcaÂtiÂon in aquaculÂtuÂre systems.
Fish farming tank
The cenÂtral comÂpoÂnent of an aquaculÂtuÂre faciÂliÂty is the fish farÂming tank. Its dimenÂsiÂons and capaÂciÂty influence both which fish speÂciÂes can be held and the annuÂal proÂducÂtion voluÂme. But what are the difÂfeÂrent types of fish tanks and which speÂciÂes are kept in our faciÂliÂty? In our blog post we give a short overview.
Cohort model
AlreÂaÂdy in the MiddÂle Ages, monÂks diviÂded their carp ponds into secÂtions of difÂfeÂrent sizes. Even today, the sepaÂraÂtiÂon of the farÂmed fish into so-calÂled cohorts is still used. But what is this diviÂsiÂon actualÂly good for? The basic idea behind the cohort model is to…