Water Treatment Technology Report
Mechanical, biological and disinfection technologies — selection, sizing, cost benchmarks and reliability considerations for aquaculture.
Updated 2026-01-01 · FishMatch Group Intelligence · Independent, vendor-neutral research.
Executive Summary
Water treatment is the single most technology-differentiated part of an aquaculture project and the largest CAPEX category in RAS. Reliable design integrates mechanical filtration, biological nitrification, degassing, oxygenation and disinfection — each sized to peak biomass, feed loading and species-specific water quality tolerances.
Key Statistics
Water treatment indicators.
- 35-45% of RAS CAPEX
- Drum filter 60-120 US$/m³/h capacity
- MBBR loading 0.3-0.8 g TAN/m²/day
- LOx 100-250 US$/t delivered
Market Overview
Global aquaculture water treatment procurement is US$ 3-4 B/year and growing 6-8% CAGR.
Industry Structure
Concentrated at the technology layer: 10-15 specialist OEMs supply most large-format equipment; a broader long tail serves smaller pond and cage projects.
Supply & Demand
Demand tracks RAS and intensification pipelines.
Government Programs
Effluent regulations in the EU, Norway, US and increasingly Asia drive procurement of tertiary treatment.
Major Projects
Every new RAS project above US$ 5M CAPEX is a major water-treatment procurement event.
Procurement Opportunities
Drum filters, MBBR / MBR media, protein skimmers, degassers, CO₂ strippers, ozone, UV, LOx, oxygen cones and controls dominate procurement.
Leading Suppliers
Nordic, Dutch, Israeli, Danish and German OEMs lead technology. See /equipment-intelligence for category comparisons.
EPC Contractors
Water treatment is typically integrated by a wet-system integrator working with the owner's engineer.
Financing Opportunities
ECAs support technology exports; green loans support high-efficiency systems.
Technology Trends
MBBR remains dominant; membrane technologies emerging for post-treatment; ozone-based disinfection replacing UV in some designs; LOx-only oxygenation replacing air blowers.
Automation
DO, ORP, TAN, nitrite, pH and CO₂ monitoring is standard; automated backwash, sludge removal and CIP are becoming standard on new-builds.
Sustainability
Energy per kg treated water and solids valorisation are the primary sustainability metrics.
Water Management
Reuse ratios, make-up rates, effluent standards — all tightening.
Risk Analysis
Sizing errors, biofilter start-up failures and equipment reliability during the first 12 months of operation are the top risks.
Five-Year Outlook
MBBR share stable; membrane bioreactors grow; ozone displaces UV in select applications; LOx penetration reaches 80% of new RAS.
Actionable Recommendations
Size for peak biomass with 20% headroom. Specify oxygen redundancy. Include CIP and backwash automation from day one.
Speak with an aquaculture specialist
FishMatch Group is independent and vendor-neutral. We help procurement managers, EPC contractors and investors run structured RFQs, evaluate project-matched suppliers, and access project financing.