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Harmful algal blooms, low dissolved oxygen events and parasite infestations can wreak havoc on net-pen operations. In fact, year after year, millions of dollars are lost to these events. Working closely with industry leaders over the last 3 years, Pentair has developed a pair of solutions that provide commercial aquaculture farmers a way to mitigate the impact of these events and the support to manage the ever changing conditions faced by sea pen operations.
The primary goal of the Pentair SPA (Sea Pen Aeration) and SPO (Sea Pen Oxygenation) system is to balance the flow of air or oxygen at each site so that distribution is even throughout the sea pen. A unique pod-based approach provides delivery systems that can be customized to the specific requirements of each site. Each pod can be placed strategically throughout the pen at specific depths to compensate for conditions. Once balance has been achieved, site specific flow adjustments can be made. The even distribution assists mitigation efforts through the promotion of increased water movement and oxygen dissolution. The even flow distribution of air or oxygen to each of these injection sites is accomplished using back pressure compensated flowmeters.
The maintenance and control of oxygen saturation supports healthy fish stocks and increase in yield potential. Manage dosing regiments by tracking critical water quality parameters using the Point Four line of monitoring and control equipment. That includes a cloud-based offering for remote monitoring and data trend analysis.
Sea Pen Aeration System Overview
Pentair Aquatic Eco-Systems Sea Pen Aeration System is a fully balanced air flow system that evenly distributes compressed air across all net pens at an aquaculture production site to promote greater water upwelling and movement. This mitigates plankton blooms by moving low density algae/plankton water from below to help dilute the algae/plankton density in the water inhabited by the fish within the pens to a reduced level. There are many different species of algae/plankton that pose different threat levels to the well-being of the fish. As such, different air flows can be dialed into the flowmeters to control the delivery of air within each pen’s diffuser platforms. This air control allows the site operator to mitigate different harmful plankton species, for each pen, based on the plankton’s unique motility. Consult with a Pentair AES representative for site specific design and performance.
- Platforms are constructed of corrosion resistant 316L stainless steel
- Outfitted with either 9” or 12” rubber membrane disc diffusers
- Lightweight platforms are easy to install, position and maintenance
- Designed not snag or tear nets
- Flowmeter manifold design allows for air output to be dialed in for maximum performance
Additional bullet points
- Lightweight galvanized frames are easily deployed and removed
- Protrusion free design does not snag or tear nets
- Stand-alone flowmeter panels/manifolds, on-off capability without removal from pens
PROMOTE GREATER WATER UPWELLING AND MOVEMENT ACROSS ALL YOUR PENS
Even distribution of compressed air throughout a sea pen site moves low density algae/plankton water from below to dilute the algae/plankton density in the water inhabited by the fish within the pens to a reduced level.
Problem: There are different strains of algae/plankton that pose different threat levels to the well-being of the fish.
The Pentair Approach: Position, depth and air flow to each diffuser platform can be controlled independently. This allows site operators to mitigate different harmful plankton species, for each pen, based on the plankton’s unique motility.
FLOWMETER ASSEMBLY PANEL
Flowmeter assemblies come in 4 variations; 7 flowmeter, 6 flowmeter, 5 flowmeter and 4 flowmeter versions. Each assembly features an oversized manifold with a pressure gauge and air control panel. Sturdy galvanized mounting legs ship with each unit to bolt to the pen walkways, for a stand-alone unit. Each panel includes a mort tube. A mort tube controls the flow of air for convenient mort removal.
The 5 flowmeter variation is for circular pens, and ships with pipe clamps to bolt to the large pipe handrails of the circular pens. For square pen installation, the flowmeter units are spread evenly among the net pens, usually one panel per pen. Each flowmeter panel services a single aeration platform to fully control air entering each site’s sea pen.
AERATION PLATFORM OVERVIEW
FEATURES AND BENEFITS
• Lightweight for easy installation and removal
• Designed not to snag or tear nets
• Removable membrane disc diffusers make for easy maintenance or replacement
ROUND PEN LAYOUT
SQUARE PEN LAYOUT