Sealife Istanbul – Achieving more with less

ATO Energysaving, with Merlin Entertainment and other partners, implemented an energy-saving initiative at Sealife Istanbul for its 5-million-liter ocean tank.

The Challenges:

• High energy consumption due to compromised hydraulic lay-out, needing significant amount of energy to get circulation (2x 37kW, 2x 30kW & 4x 15kW).
• Lack of bottom and side drains in the tank design, leading to inefficient waste capture and excessive detritus buildup, requiring daily siphoning.
• Protein skimmers underperformed as waste failed to reach the LSS.
• Ineffective biological filtration caused by insufficient waste retention time in the filters, caused by not well spreading of water on the bio filter area
• Significant water and salt usage for siphoning and backwashing

The Solution:

• Replaced sand in the filters with AFM^® (Activated Filter Media), enhancing filtration and stabilizing ORP (Oxidation-Reduction Potential) levels, enabling automatic ozone generator shutdown and reducing energy consumption.
• Implementation of 17 highly efficient AFC400 propeller pumps and adjustments of speed to the existing pumps and taking offline the 37kW pumps.
• Optimized water flow with AFC400 pumps, to keep detritus suspended, reducing daily siphoning demands.
• Enhanced retention time and even water flow through biological filters for better nitrification performance.
• Reduced backwash intervals, saving water and salt.

Pumps energy usage	1’250 MWh/year	550 MWh/year
Power use of pump of filters	200 MWh/year	<100 MWh/year
Backwash interval	Twice a week	Once a week
Backwash volume	2500m3/year	600m3/year
Water to be reclaimed	10 million liters	2.4 million liters
Circulation in the tank	2.1 million liters/h	3.4 million liters/h

Results:

• 700’000 kWh are saved per year
• The optimized circulation system increased water movement by over 50%, improving cleanliness within the tank and reducing detritus buildup.
• The reduction in detritus accumulation decreased the need for siphoning and backwash operations, which in turn saved water and salt.
• The frequency of backwashing was halved.
• AFM^® improved water quality and stabilized ORP, minimizing the need for chemical additives such as ozone.
• FormaEin Bild, das Konzert, Aquarium enthält.
• Automatisch generierte BeschreibungFormaTuning the pumps to lower flow rates reduced system noise.