Aquaculture
INDUSTRY

Wedge Wire Screens for Aquaculture and Fish Farming

Aquaculture operations depend on reliable water filtration to maintain water quality, protect fish stocks, and manage waste streams. Wedge wire screens provide non-clogging, low-maintenance filtration for intake water screening, recirculating aquaculture system (RAS) filtration, and effluent treatment. The continuous slot design ensures uniform flow distribution critical for maintaining dissolved oxygen levels, while passive intake configurations protect both aquatic life and the facility water supply.

APPLICATIONS

Where Our Screens Work

Intake Water Screening

Passive intake screens prevent debris, algae, and wild fish from entering aquaculture water supply systems. Low through-slot velocity meets environmental regulations for aquatic life protection.

Recirculating Aquaculture Systems (RAS)

RAS drum filters and cylindrical filters provide continuous mechanical filtration in recirculation loops. Automatic backwash maintains filtration capacity without interrupting fish production.

Effluent Treatment

Sieve bend and rotary screens remove suspended solids from discharge water before release. Meeting environmental discharge limits requires consistent filtration below permitted TSS levels.

Fish Egg and Fry Protection

Fine-slot screens in hatchery systems protect fish eggs and fry from mechanical damage while maintaining water circulation. Slot sizing is matched to species-specific requirements.

Waste Collection and Solids Removal

Flat panel and cylindrical screens collect feed waste and fecal solids from tank bottoms and raceways. Self-cleaning V-wire design reduces manual maintenance.

MATERIALS

Materials for Aquaculture

SS 304Freshwater hatchery applications with minimal chloride exposure.
SS 304LWelded freshwater RAS and inland hatcheries.
SS 316LBrackish and saltwater aquaculture.
Super DuplexOpen ocean and high-salinity marine farms.

Regulatory Compliance

US Clean Water Act Section 316(b)
EU Water Framework Directive
US NOAA / NMFS fish protection standards
FAILURE MODES & MITIGATION

How Screens Fail — and How We Prevent It

Biofouling (algae, mussels, barnacles)

Higher-grade alloys and optional surface treatments slow biological attachment. Continuous-slot V-wire profile is cleanable in place.

Salt and seawater corrosion

SS 316L for brackish service; Super Duplex for full seawater immersion and open-ocean cage installations.

Fish impingement on intakes

Slot opening and through-slot velocity selected per species and life-stage; complies with 316(b), EU Water Framework Directive, and NOAA/NMFS guidance.

Sediment and feed waste buildup

RAS drum filter and self-cleaning V-wire geometry sustain flow under continuous solids loading. Backwash interval matched to feeding cycle.

HOW TO SPECIFY

What to Send for an Accurate Quote

The more of these you can share when you request a quote, the faster we respond with a defensible specification.

ApplicationIntake · RAS drum filter · effluent · hatchery · fry protection · waste collection
Slot opening0.1 mm – 3 mm depending on life stage and solids loading
Screen geometryRAS drum · cylindrical · sieve bend · flat panel · intake T-screen
Source water typeFresh · brackish · seawater · recirculation loop
Material gradeSS 304L · SS 316L · Super Duplex
Through-slot velocity target≤ 0.15 m/s (0.5 fps) for 316(b) and NMFS compliance
Operating temperatureAmbient water temperature, typically 5 – 30 °C

Specify Your Aquaculture Screen

Send your application parameters. We respond within one business day.

REQUEST A QUOTE