ChimanaTech RAS-One

How it works

• Water enters at the top of the vessel and is stripped of CO₂ with diffused aeration.

• Water flows down a biomedia bed, where nitrification occurs

• At the bottom, water enters a second chamber where oxygenation is achieved with a down-flow oxygen saturator.

• Water exits through an overflow at the top, by gravity.

  Additional functions

• Protein skimming: intense aeration for CO₂ strpping may produce foam. Excess foam escapes through the crown outlet at the top. Excess foam can also be pushed out by increasing the water level in the system.

• Microparticle filtration: depending on user preference, the biomedia can be stirred gently for a moving bed bioreactor function, or left still as a fixed bed biofilter. In fixed bed biofilter mode, the biofilter traps fine solids. This can be used to aid in particle filtration.

  RAS-One requires a mechanical filtration step upstream e.g. sand filters, bead filters or drum filters + pump sump.

Models

S - Standard

Standard RAS-One for research, hatcheries and pilot applications. Capacities from 1 to 5kg of feed per day and flows from 3 to 30m3/h.

C - Commercial

For RAS farms and large aquacultuee facilities. Capacities from 20 to 70 kg of feed per day and flows from 120 to 500m3/h.

A - Aquatics

For home, laboratories, restaurants and small live holding facilities. >1 kg feed per day and >3m3/h.

The core of RAS in a single device

RAS-One combines CO₂ stripping, ammonia removal, oxygenation and fine solids removal in one integrated unit. RAS-One is designed as a modules that can be deployed in applications ranging from research and hatcheries to full commercial farms.