Let’s Dive into Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055
The Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055, manufactured by Nalge Nunc, represent a significant investment for biopharmaceutical companies, research institutions, and potentially even advanced agricultural operations. These 210-liter tanks are designed for applications requiring a robust, chemically resistant, and sterile environment, particularly those involving cell culture, fermentation, or bulk storage of sensitive materials. The closed-dome design aims to maintain a cleaner working environment, and the polypropylene construction offers broad chemical compatibility.
I was initially tasked with finding a cost-effective yet highly reliable solution for a pilot-scale fermentation process. Existing stainless-steel vessels were proving too expensive for the early stages of research and development, and smaller plastic containers lacked the necessary capacity and features for controlled aeration.
My initial impression upon seeing the Nalge Nunc Closed-Dome Bio Tank was one of substantial, industrial-grade construction. The polypropylene felt thick and durable, and the graduated wells hinted at the tank’s intended purpose for precise measurements and controlled environments.
Compared to similar products like the Thermo Scientific HyClone S.U.B. (Single-Use Bioreactor) or the Sartorius Stedim Biotech Flexsafe RM bags, the Nalge Nunc tank offered a more traditional, reusable approach. While single-use systems minimize cleaning validation, the Nalge Nunc tank’s chemical resistance and potential for autoclaving presented a cost-effective and environmentally conscious alternative. I picked this tank for its anticipated chemical inertness and reusability.
I was cautiously optimistic. The tank’s potential for reducing costs and increasing flexibility in our pilot-scale studies was exciting, but I was also aware that polypropylene, while robust, might not offer the same gas barrier properties as some specialized bioreactor bags.
Real-World Testing: Putting Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055 to the Test
First Use Experience
I initially tested the Nalge Nunc Closed-Dome Bio Tank in a pilot-scale fermentation run involving E. coli expressing a recombinant protein. The tank was placed in a temperature-controlled room at 37°C, and aeration was supplied through a sterile air filter connected to the tank’s outlet after removing the plug.
The tank performed well under these conditions. The polypropylene held up to the slightly acidic conditions of the fermentation broth, and the closed-dome design seemed effective in minimizing contamination from the surrounding environment. There were no immediate issues with leaks or material degradation.
Using the tank was straightforward. The graduated wells provided a visual aid for monitoring the fermentation volume, and the relatively smooth interior surface facilitated cleaning between batches. The size of the tank, however, made it cumbersome to move around even when empty.
After the initial run, I noticed slight discoloration of the polypropylene in areas that were exposed to high concentrations of the fermentation broth. While this didn’t appear to affect the tank’s structural integrity, it raised concerns about long-term staining.
Extended Use & Reliability
After several months of repeated use and sterilization cycles, the Nalge Nunc Closed-Dome Bio Tank has proven to be a relatively reliable vessel. There have been no major failures or leaks.
The polypropylene has shown some signs of wear and tear, including minor scratches and scuffs from routine handling and cleaning. The discoloration observed after the first use has persisted, but it hasn’t worsened significantly.
Maintaining the tank requires careful cleaning and sterilization between each use. The smooth interior is relatively easy to clean with standard detergents and disinfectants. Autoclaving the tank is possible, but its size necessitates a large autoclave chamber.
Compared to previous experiences with smaller, less robust plastic containers, the Nalge Nunc tank is a significant upgrade. Its larger capacity, chemical resistance, and closed-dome design provide a more controlled and reliable environment for bioprocessing.
Breaking Down the Features of Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055
Specifications
- Volume: 210 liters (55 gallons). This large capacity is ideal for pilot-scale operations or applications requiring batch production.
- Dimensions (O.D. x H): 559 mm x 1099 mm. These dimensions indicate a bulky but manageable size for industrial or laboratory settings.
- Material: Polypropylene. Polypropylene offers excellent chemical resistance to a wide range of acids, alkalis, and solvents, making it suitable for diverse applications.
- Design: Closed-dome with graduated wells and flanged inner surface. The closed-dome design helps maintain a cleaner working environment by minimizing exposure to airborne contaminants. The graduated wells provide visual volume indication and potential aeration.
- Outlet: Plugged outlet for controlled access and sterility maintenance. The plug allows for connection to tubing or other equipment while preserving the tank’s internal environment.
- NNI No.: 2650-0055.
These specifications are crucial for applications where maintaining sterility, chemical compatibility, and controlled aeration are paramount. The large volume enables batch processing, while the polypropylene construction ensures resistance to corrosive substances.
Performance & Functionality
The Nalge Nunc Closed-Dome Bio Tank performs well in its intended role as a general-purpose receiver tank. It reliably contains liquids and resists chemical degradation.
The tank’s primary strength lies in its chemical resistance and robust construction. However, its lack of integrated aeration or temperature control systems may require additional equipment for certain applications.
The tank generally meets expectations for a basic receiver vessel. However, potential users should be aware of its limitations regarding advanced bioprocessing features.
Design & Ergonomics
The Nalge Nunc tank’s build quality is solid, with thick polypropylene walls and a sturdy base. The weight, when empty, is manageable, but a full tank requires significant lifting equipment.
The tank is relatively user-friendly, although its size can make it cumbersome to handle. The graduated wells provide a clear visual aid for volume estimation.
Durability & Maintenance
With proper care, the Nalge Nunc Closed-Dome Bio Tank should last for several years. The polypropylene is resistant to cracking and shattering under normal use.
Maintenance involves regular cleaning and sterilization. The smooth interior surface simplifies cleaning, and the tank can be autoclaved for high-level sterilization.
Accessories and Customization Options
The Nalge Nunc Closed-Dome Bio Tank comes with a simple plug for the outlet. There aren’t specific customization options offered directly by Nalge Nunc.
However, the tank’s standard port allows for connections to various tubing, filters, and other accessories from third-party manufacturers. Users can add their own aeration systems, sensors, and other equipment to customize the tank for specific applications.
Pros and Cons of Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055
Pros
- Excellent chemical resistance due to polypropylene construction.
- Large 210-liter capacity for batch processing.
- Closed-dome design helps maintain a cleaner working environment.
- Graduated wells for easy volume estimation.
- Reusable and autoclavable, offering long-term cost savings.
Cons
- Relatively high initial cost.
- Lacks integrated aeration or temperature control systems.
- Bulky and difficult to move when full.
Who Should Buy Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055?
Perfect for: Biopharmaceutical companies conducting pilot-scale fermentation, research institutions storing sensitive materials, and agricultural operations requiring large-volume chemical storage.
Who should skip this product? Operations requiring single-use bioreactors, or those needing fully automated bioprocessing with integrated aeration and temperature control.
Must-have accessories or modifications? Sterile air filter for aeration, temperature control system (heating/cooling jacket), and robust lifting equipment for handling when full.
Conclusion on Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055
The Nalge Nunc Closed-Dome Bio Tanks, Polypropylene, NALGENE 2650-0055 offers a robust and chemically resistant solution for large-volume liquid storage and basic bioprocessing. While it lacks the advanced features of dedicated bioreactors, its reusability and chemical compatibility make it a cost-effective option for specific applications.
At $1739.00, the price is justified for users needing a durable and chemically inert container for large volumes. However, the added cost of aeration and temperature control must be factored in.
I would recommend this tank to researchers or companies seeking a reliable and reusable vessel for pilot-scale fermentation or chemical storage, provided they are comfortable adding external control systems. Weigh your needs carefully. If your process requires precise, automated control, a single-use system might be a better investment. But for many applications, the Nalge Nunc tank is a solid choice.