Glass Airlift Bioreactor

What is the Glass Airlift Bioreactor?

A glass airlift bioreactor uses gas-driven circulation in a tall transparent column, providing gentle low-shear mixing and clearly visible flow. It suits shear-sensitive cells, filamentous organisms, algae and teaching demonstrations of circulation.

Overview

A glass airlift bioreactor circulates the broth with gas introduced at the base of one section of a divided column. Rising gas lowers the density in the riser, so liquid rises there and descends in the downcomer, creating continuous circulation without an impeller. The transparent body lets operators observe circulation rate, bubble behavior and biomass distribution directly, which is helpful when developing a process. Because there are no moving parts in the liquid, shear is low and the configuration suits filamentous organisms, plant cells and algae. Temperature is controlled by a jacket or bath, and pH and dissolved oxygen are held by dosing and by gas flow or composition. The tall geometry improves gas contact but requires more headroom than a stirred vessel of the same volume.

How does it work?

A glass bioreactor uses a transparent vessel so that mixing, foam, color and biomass can be observed directly during culture. Borosilicate glass resists thermal shock and most cleaning agents, and a detachable headplate carries the agitator, sparger, probes and ports. Temperature is controlled by a water jacket, a heating blanket or a water bath, pH is adjusted by dosing acid, base or carbon dioxide, and dissolved oxygen is held by adjusting gas flow, oxygen fraction or agitation speed. Mixing may be by impeller, by gas-driven circulation in airlift or bubble column designs, or by gentle rocking for sensitive cells. Glass vessels are usually sterilized in an autoclave, which limits their practical size, but they allow rapid changes of impeller, sparger and sensor configuration between experiments.

What are the key features?

• Transparent column with riser and downcomer
• Gas-driven circulation without impeller
• Low shear for sensitive cultures
• Visible bubble flow and mixing
• Jacket or bath temperature control

What are the technical specifications?

A typical glass airlift bioreactor configuration offers working volume of 0.5–20 L, column geometry of Divided glass column with draft tube, aeration rate of 0.5–2 vvm, temperature range of Ambient +5 to 60 °C, pH control of 2–12, ±0.05 and dissolved oxygen control of Via gas flow or composition. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Glass Airlift Bioreactor is used in shear-sensitive cell culture, algae and cyanobacteria culture, fungal fermentation studies and teaching of bioreactor principles. Across the wider Glass Bioreactors class, laboratories also deploy it for process development and scale-down models, cell culture optimization and microbial fermentation studies.

Which standards and certifications apply?

Relevant standards and methods include ISO 9001, USP <87>, USP <88>, IEC 61010-1, ISO 11133 and GB/T 150. Certification candidates for this model are CE, ISO 9001 manufacturing and IEC 61010-1 compliance; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Inspect glass for chips or cracks before each run, because even a small flaw can fail under autoclaving or pressure. Assemble the headplate carefully so that probes do not touch the impeller, and check that all ports are sealed. Calibrate pH and dissolved oxygen probes before sterilization and confirm they survive the cycle. Use a protective shield or cabinet where pressure or a fragile vessel could present a hazard. Clean glass promptly to avoid baked-on residue, and avoid strong alkalis that etch the surface over time. Replace gaskets and O-rings on a schedule, and keep a log of sterilization cycles for each vessel and headplate.

How do I select the right Glass Airlift Bioreactor?

Choose a glass airlift for shear-sensitive cultures and where visual observation of circulation is valuable. In an RFQ specify the working volume, column height and headroom, aeration range, draft tube design, temperature control and the instrumentation required.

How does it compare with other Glass Bioreactors variants?

Choose a glass bioreactor when you need to see the culture, change configuration quickly or work at small volumes. Select the mixing principle from the cell type and oxygen demand: stirred designs give flexible power input, airlift and bubble columns suit shear-sensitive cultures, packed-bed designs suit adherent cells on carriers, and photobioreactors suit photosynthetic organisms. Confirm the working volume and headspace, the number and type of ports, and whether the headplate can accommodate the probes and feeds you need. Check the temperature control method, since a water jacket gives more uniform heating than a blanket, and confirm how the vessel is sterilized. Verify that materials and connectors suit autoclaving and that spare headplates and vessels allow parallel or rapid sequential experiments.