Compared to fixed-in-place bioreactors, disposable bioreactors are significantly smaller in size where the current largest size holds around 2000L while fixed in place bioreactors hold up to 20000L.

The disposable bioreactor's smaller volume makes it less favorable when looking to scale up bigger cell cultures as it would be more time consuming and labour intensive.

Some instances where a fixed in place bioreactor would be more beneficial would be culturing cells for the biopharmaceutical industry where large batches of mammalian cells are cultured to ensure that biologics such as monoclonal antibodies, viral vectors and recombinant proteins are readily available for use.

The removal of cleaning regimes in disposable bioreactors offers numerous benefits that increases productivity and save costs. By eliminating the requirement for cleaning-in-place (CIP) and sterilization-in-place (SIP), which are common procedures of fixed-in-place bioreactors, the downtime between batches in disposable bioreactors are significantly reduced, allowing for quicker turnaround times and operational efficiency. Through this, disposable bioreactors also eliminate expenses associated with using cleaning solutions and sterilizing agents, along with the utilities needed for these operations such as energy, steam and water hence, further reducing the wastewater treatment costs. Additionally, as disposable bioreactors come pre-sterilized, the risk of product contamination from improper cleaning is also reduced, ensuring an increase in product safety and quality.

Also, by eliminating the requirements for intricate cleaning and sterilization process, the need for complex validation is removed, further reducing the operational burdens to streamline regulatory compliance. Despite generating waste, disposable bioreactors also further prevent the negative environmental impact of using harsh cleaning chemicals and excessive water and energy by adopting advanced disposal processes that provide sustainable alternatives. Together, all of these advantages derived from the elimination of cleaning regimes makes disposable bioreactors a more cost-effective and practical choice for modern bioprocessing.

Disposable bioreactors are pre-sterilized by the manufacturer before selling it to companies. They often use gamma irradiation or ethylene oxide to sterilize the bioreactors before it is safe to use. These bioreactors are then discarded after a single use. This allows users to use the bioreactors without wasting time to perform on-site sterilization and also reduces errors during cleaning and sterilizing which can lead to rare cross contamination of the bioreactors.

Traditional bioreactors require cleaning-in-place and sterilization-in-place systems to sterilize and remove microbial contaminants, which happen quite often. These systems require more effort to maintain the bioreactor. Moreover, they are more susceptible to human error when cleaning and can leave contaminants due to incomplete or inaccurate cleaning or sterilization.

However, disposable bioreactors does not require a cleaning or sterilizing process as it has already been sterilized by the manufacturer and it is disposed after a single use, so there is no need for a cleaning process. Thus, reducing cross contamination risks from microbial contaminants remaining from possible improper sterilization and other residues.

In terms of flexibility, efficiency, and operating costs, disposable bioreactors are clearly superior to fixed-in-place systems for small to medium-scale production. They enable quicker turnaround times and increase production by doing away with the need for cleaning and sterilization, which also drastically lowers labor, utility, and downtime costs. By doing this, contamination concerns are also reduced, improving product safety and lessening the regulatory load related to cleaning validation. They are also perfect for clinical manufacturing, pilot studies, and multi-product facilities where quick adjustments are required due to their scalability to specific project needs.

Although there are issues with plastic waste and restricted scalability, these disadvantages are frequently outweighed in situations where priority is given to speed, ease of use, and less infrastructure. Because the cost of single-use components is still affordable and the environmental impact may be reduced through sophisticated waste management techniques, disposable systems are particularly beneficial in small-batch production. With the growing need for adaptability and responsiveness in biomanufacturing, disposable bioreactors offer a viable and effective substitute for conventional fixed systems.

Using one-time use bioreactors drastically reduces costs to buy as single-use plastic vessels are cheaper than stainless-steel / lass vessels. The life-time operating costs of disposable are also much lower and do not require immediate upfront investment of the different systems within a traditional bioreactor such as the pH system and piping because they don't require permanent infrastructures.

Disposable bioreactors also do not require regular maintenance or fixing for the different compartments that are also made of stainless-steel which ultimately helps productivity and reduces down-time.

Disposable bioreactors also eliminate the need for CIP and SIP and reduces the water and utility consumption. Traditional bioreactors use heaps of water and energy for heating and cleaning, along with the different cleaning agents used which are expensive. Not to mention the cost of validating sterility of the bioreactors via swab-tests and rinse-tests which can also be heavily labor intensive.

Disposable bioreactors come pre-sterilized and are single-use thus extra labor and costs do not need to go into avoiding cross-contamination which also helps increase productivity.

Disposable bioreactors not only reduce costs but also reduce down-time which in turn produces more products to enhance revenue earned, which is a win-win situation.