Exploring the advantages and challenges of single-use systems in bioprocessing
Single-use systems (SUS) have rapidly become critical tools in biotechnology and biopharmaceutical manufacturing. These disposable technologies, including single-use bioreactors, streamline production, enhance flexibility, and significantly reduce cross-contamination risks. Such advantages notably benefit industries requiring frequent batch changes, such as personalized medicine, cell therapies, and gene therapies, by substantially improving operational efficiency.
Defining single-use systems
Single-use systems in bioprocessing are disposable tools and devices made from sterile, pre-validated plastic materials. These include single-use bioreactors, disposable bags, tubing, connectors, filters, and mixing vessels. Unlike conventional stainless-steel equipment, single-use technologies eliminate extensive cleaning and sterilization between batches, allowing for rapid transitions between production runs and reducing associated downtime and labor costs.
Advantages of single-use bioprocessing equipment
Single-use bioprocessing provides significant benefits, particularly in environments requiring frequent batch turnovers, such as personalized therapies and small-scale biomanufacturing. A key advantage is the minimized risk of cross-contamination between batches, which ensures consistent quality and purity of biopharmaceutical products. Additionally, single-use systems dramatically reduce changeover times between batches, enabling facilities to quickly prepare for subsequent production runs. This efficiency is particularly valuable when producing biologics with short shelf lives or in urgent production scenarios.
From a financial perspective, single-use systems typically involve lower upfront capital expenditures (CAPEX) compared to traditional stainless-steel installations. However, ongoing operational expenditures (OPEX) per batch can be relatively high due to continual costs for consumables. It is crucial for manufacturers to carefully analyze total production costs, balancing the consumable costs against significant savings from reduced labor, energy usage, cleaning processes, and minimized downtime. Particularly for high-frequency batch operations, single-use systems often prove economically advantageous despite higher per-batch consumable expenses.
Sustainability and environmental impact
Despite their advantages, single-use bioprocessing technologies pose environmental challenges, particularly concerning plastic waste management. Laboratories and bioprocessing facilities generate significant quantities of plastic waste, mostly single-use items like tubes, petri dishes, and disposable culture vessels, typically composed of petroleum-based plastics such as polystyrene. Annually, laboratories globally produce approximately 5.5 million tons of non-recyclable plastic waste, accounting for 4.4% of total global carbon dioxide emissions (1).
This waste is generally managed through incineration, which releases carbon dioxide previously sequestered underground in fossil fuels, thus directly contributing to climate change. To address this issue, the industry is increasingly seeking sustainable alternatives. One promising approach involves adopting biodegradable materials like polylactic acid (PLA), a renewable polymer derived from plant sources such as corn starch. Although still novel for bioprocessing applications, PLA offers a significant reduction in environmental impact compared to petroleum-based plastics.
Regulatory and quality considerations
Single-use bioprocessing equipment must comply with rigorous regulatory and quality standards, irrespective of its single-use nature. Critical aspects include biocompatibility, the absence of endotoxins, and stringent controls ensuring the absence of particulate contamination. Furthermore, these systems must be thoroughly assessed for potential leachables and extractables, such as bisphenol A (BPA), which could compromise cell cultures or the final product. Ensuring the complete absence of these contaminants is critical, as even trace amounts can significantly impact the safety and efficacy of biologics.
Moreover, validation and qualification procedures are mandatory at all stages and scales of bioprocessing using single-use systems, not just during commercial manufacturing but throughout process development phases. Even though single-use systems offer rapid changeover between batches, strict regulatory compliance remains essential. Short changeover times, although operationally advantageous, require careful validation to ensure they do not compromise process robustness and consistent product quality.
Single-use systems in bioprocessing offer benefits such as lower contamination risk, high flexibility, and fast batch turnover. However, high operating costs and plastic waste remain challenges. Sustainable materials like PLA aim to combine efficiency with environmental responsibility. Green Elephant Biotech develops PLA-based single-use solutions that maintain performance while reducing environmental impact, supporting a more sustainable bioprocessing future.
References:
(1) Urbina MA, Watts AJ, Reardon EE. Environment: Labs should cut plastic waste too. Nature. 2015 Dec 24;528(7583):479. doi: 10.1038/528479c. PMID: 26701046.
