Mass balance
Feed drives everything: O₂ consumed, CO₂ produced, TAN produced, solids produced.
エンジニアリング · RAS Design Fundamentals
RAS Design Fundamentals
A bankable RAS is designed from a mass balance, not a P&ID.
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Process flow
Solids removal → biofilter → degasser → oxygenator → temperature control → back to tanks.
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Short answer
What do buyers need to know about RAS Design?
RAS Design affects both project cost and project risk, so it belongs in the specification stage rather than the purchasing stage. This page sets out what commercial buyers assess, what typically drives cost and lead time, and which questions to put to suppliers before signing. You can turn any of it into a confidential RFQ in a few minutes.
- Who it is for:
- Investors, operators and project developers specifying commercial systems
- Cost drivers:
- Capacity, water source, energy price, permitting and logistics
- Next step:
- Turn the requirement into a confidential RFQ
- Cost to buyers:
- No fee charged to the buyer
Before you request quotes
Equipment scope
What equipment does a commercial aquaculture project actually need?
A grow-out project typically needs holding infrastructure (tanks, ponds or cages), water movement (pumps, piping, valves), aeration or oxygenation, water treatment appropriate to the system, feeding equipment, grading and handling gear, monitoring and alarms, and backup power. RAS adds mechanical filtration, biofiltration, degassing, disinfection and tighter process control. Hatchery and processing scopes are specified separately.
Which equipment should be specified before requesting quotes?
Specify the items whose sizing changes everything downstream: design biomass and stocking density, water exchange or recirculation rate, oxygen demand at peak temperature, and installed pumping head. With those four fixed, suppliers can quote aeration, filtration, pumps and power on the same basis. FishMatch calculators produce these figures and attach them to the RFQ.
Can equipment be sourced in stages?
Yes, and phased procurement is common. The usual sequence is water supply and holding infrastructure, then aeration and treatment, then automation and monitoring, then processing and cold chain. Staging works when interfaces and capacity headroom are defined at the start; otherwise later phases force replacement rather than addition.