Recirc

REX-M:
Matthias Mahnke
Feithierenstrasse 154
CH-3952 Susten

Mobile: +41 (0) 76 483 21 30
E-Mail: mm@rex-m.de
Skype: ichthyotech
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REX-M land-based RAS (Recirculating Aquaculture Systems) are characterized by unique flexibility, high system security, practice-oriented management, species-specific husbandry and attractive design.

 

REX-M differentiates system solutions for the production of eggs (broodstock, wintering & hatchery), fry (weaning), fingerlings (nursery), on-grown fish (on-growing) and food fish (grow-out & purging).

 

 

PFT-RAS


PFT (Parallel Fed Tanks) can be taken from the system to be drained individually. Hydraulics can be adapted to the needs of species and the size of fish. PFT-systems always will be applied for weaning, nursery and small-scale RAS.

 

SCR-RAS


Without piping SCR (Series-Connected Raceways) allow a most-efficient recirculation for industrial-scale on-growing, grow-out, purging, broodstock and wintering operations. Habitat of rectangular tanks can be divided individually with help of partition grids.

 

Process technology


RAS are based on water transport and mechanical, physical, biological and chemical water treatment. Thus RAS minimize water demand and realize optimal control of farming conditions.

 

REX-M design and engineering is adapted to well-proven equipment of exclusive manufacturers. REX-M customers benefit from partner prices:

 

SUPPLY


  • PUMPS

REX-M RAS are characterized by their Low-Head-Design. Propeller pumps are most efficient to recirculate the water. Submersible pumps, volute casing pumps and filter pumps are utilized for small-scale RAS, bypass filter applications and sewage. High-pressure pumps are utilized for injection of ozone, backwashing of drum filters and transport of well water. REX-M Partner for pumps is KSB AG:

AMALINE propeller pumps

AMAREX submersible pumps

SEWABLOC volute casing pumps

MOVITEC high-pressure pumps

 

REX-M recirculation pumps water transport RAS aquaculture

 

  • BLOWERS

Regularly REX-M is using frequency-controlled 1-ary side channel blowers for small, variable volumetric flow rates up to 500 m³/h and 250 mbar. Above rotary piston fans and 2-ary side channel blowers are applied

REX-M partner for side channel blowers is Elektror airsystems GmbH, REX-M partner for rotary piston fans is Aerzener Maschinenfabrik GmbH:

SD 1-ary side channel blowers

2SD 2-ary side channel blowers

DELTA BLOWER rotary piston fans

 

REX-M blower fan aeration air supply RAS oxygenation degassing aquaculture

 

  • PIPING

PVC-U pressure pipes up to nominal size DN250 are suitable to transport water and air. PVC-U sewage pipes are available up to DN500. For water applications of larger nominal diameters REX-M is planning pipes made from Polyethylen. REX-M partner for PVC-U piping is LA.RE.TER. Spa:

LARETER pressure pipes

LARETER pressure fittings

LARETER sewage pipes

LARETER sewer fittings

 

REX-M piping dosing RAS pH stabilization carbon source denitrification aquaculture

 

  • DOSING

PH-set point will be adjusted by demand-actuated supply of alkaline substances in form of lime and soda with help of dosing units. Denitrifying bacteria will be fed with carbon. REX-M partner for dosing systems is sera GmbH:

CTD compact tank dosing unit

CVD compact dosing system

 

WATER TREATMENT


  • MECHANICAL WATER TREATMENT

Particular matter accumulates in the water during the production process. Settlers remove sediments. Microscreen drum filters remove suspended solids larger than 30 µm. Fine suspended solids will be controlled in submerged fixed bed reactors.

REX-M partner for microscreen drum filters is FAIVRE Sas respectively OOO Merke, REX-M partner for fixed bed packings is Christian Stöhr GmbH & Co.KG:

MERKE: FAIVRE drum filter

HEL-X FBBR packings

 

REX-M biofilter RAS nitrification denitrification MBBR FBBR aquaculture

 

  • BIOLOGICAL WATER TREATMENT

Substances dissolved in water will be reduced by bacteria. Nitrification, meaning the elimination of fish toxic ammonia, is the bacterial oxidation of ammonium to nitrite (Nitrosomonas & Nitrospira) and nitrate (Nitrobacter). Nitrate either can be thinned out by exchange of water or can be reduced by bacterial denitrification. REX-M partner for packings is Christian Stöhr GmbH & Co.KG:

HEL-X MBBR & FBBR packings

 

REX-M aeration RAS oxygenation degassing aquaculture

 

  • PHYSICAL WATER TREATMENT

Aeration supplies fish and bacteria with oxygen and degas unwanted gases (e. g. carbon dioxide & nitrogen).

REX-M partner for diffuser systems is OTT System GmbH & Co. KG, REX-M partner for mechanical oxygenators is LINN Gerätebau GmbH respectively OOO Merke and REX-M Partner for trickling tower degassing is Christian Stöhr GmbH & Co.KG:

D-REX diffuser

MAGNUM diffuser

AIRREX carrier system 

LOXY mechanical oxygenator

HEL-X trickling tower packings

 

REX-M UV disinfection RAS aquaculture

 

Germs will be reduced by the exposure to UV-light. REX-M partner for UV-systems is ULTRAAQUA A/S:

Polypropylene (PP) closed reactor series

PP C series for open channel systems

 

  • CHEMICAL WATER TREATMENT

Using ozonation reduces not only germs effectively. Moreover ozone boosts degradation of organic compounds (yellow substance → turbidity ↓ // geosmin & MIB → off-flavour ↓) and increases both nitrite oxidation and redox potential. REX-M partner for ozone generation is Xylem Water Solutions Deutschland GmbH:

MODULAR ozone system

GSO ozone system

SMOevo ozone system

 

Chefmontage Abu Dhabi - weaning & nursery

 

PFT Kreislaufanlage RAS

 

Referenz Reference RAS Kreislaufanlage REX-M

 

AquaOrbis

 

Raceway Kreislaufanlage RAS

 

rex-m-ras-recirculating-aquaculture-system-process-technology-drumfilter-oxygenation-aeration-uv-disinfection-ozonation-pump-habitat-mbbr-biofilter

 

Teller_halb klein

 

Standardlängen und Membrantypen

 

sera_CTD_200-1

 

hel-x Biofilter MBBR Füllkörper black

 

Cluster_MG_6967.1

 

Stöhr-Füllkörper-Hel-X-e1429784499862

 

REX-M biofilter chips RAS Kreislaufanlage Nitrifikation

 

hel-x Biofilter MBBR Füllkörper

 

REX-M UV Desinfektion Kreislaufanlage UV-disinfection RAS УЗВ

 

REX-M UV Desinfektion Kreislaufanlage UV-disinfection RAS УЗВ Ultraaqua 220W family portrait

 

gso

 

rex-m-ras-water-treatment-raceways-scr-round-tanks-pft

 

neue-amaline-grau

 

amarex-krt

 

KSB-Spiralgehausepumpe-Sewabloc

 

Elektror-Seitenkanalverdichter-SD

 

delta-hybrid_large

 

Aerzener-Drehkolbengeblaese_large

 

Elektror-2-stufige-Seitenkanalvdichter-2SD

 

kreislaufanlage-ras-piping-rohrleitung-pvc

 

kreislaufanlage-ras-piping-rohrleitung-formstuecke-fittings-pvc

 

sera_CVD1_C409.2

 

REX-M Kreislaufanlage Mikrosieb Trommelfilter RAS microscreen drum filter УЗВ барабанный фильтр

 

merke-rex-m_

 

loxy

 

OTT-D-REX-disc-diffuser-on-AIRREX-piping-system

 

ott-magnum-airrex

 

smoevo