Our hermetic disc stack centrifuge for biological broth clarification is a closed, sanitary separation platform engineered for continuous harvesting and debris removal from microbial fermentation, mammalian cell culture and bioconversion broths, where air exposure, shear damage and uncontrolled foaming can degrade target biomolecules and compromise downstream purification yields. The fully hermetic hollow-spindle feed architecture eliminates air-liquid interfaces within the rotating bowl, delivering gentle acceleration of suspended solids to minimise cell lysis, protein denaturation and oxidation risk for oxygen-sensitive products. Developed for cGMP biomanufacturing workflows, this separator acts as the primary harvest clarification unit upstream of depth filtration, tangential flow filtration and chromatography, delivering consistent supernatant clarity while preserving product integrity across pilot and commercial production scales.
The disc stack assembly is configured with precision-formed conical discs that subdivide the broth into thin laminar flow layers, amplifying settling efficiency under high centrifugal g-force and enabling efficient partition of cell biomass, cell debris and insoluble precipitates from the liquid phase. Integrated sanitary mechanical seals, self-contained solids ejection mechanisms, CIP-capable wetted surfaces and process instrumentation for feed flow, pressure and turbidity monitoring support seamless automation and closed-loop control within skid-mounted downstream trains. Constructed from 316L stainless steel with electro-polished product contact surfaces and validated elastomer seals, the system complies with ASME BPE design expectations, with full documentation including performance test records, material traceability, FAT protocols and P&ID schematics for quality review and regulatory inspection. Process parameters such as feed rate, differential pressure and ejection cycle timing are adjustable to accommodate variable cell densities, broth viscosity and batch-to-batch fermentation variability.
Deploying a hermetic disc stack centrifuge fundamentally strengthens the robustness and economics of bioprocess harvest operations compared with conventional open centrifugation or single-stage filtration workflows. By removing the bulk of biomass continuously, it reduces solids loading on downstream filter media, extending filter service life, lowering consumable expenditure and cutting downtime for filter exchange. The sealed containment profile suppresses aerosol release, improving operator safety for high-containment biological programmes and reducing contamination hazards in multi-product facilities. Gentle, low-shear fluid handling retains intracellular and secreted target titres, delivering higher recoverable yield and reducing the burden of impurity clearance in subsequent unit operations, while stable continuous operation supports alignment with fed-batch and perfusion bioreactor output schedules.
We deliver the complete clarification solution encompassing performance sizing, skid integration, control system configuration, factory acceptance testing, site commissioning, IQ/OQ support and operational training for process and maintenance teams. Our separation engineering specialists collaborate with downstream process owners to align centrifuge throughput, ejection logic and interface requirements with bioreactor discharge, buffer conditioning and subsequent purification steps, whether integrated into greenfield biomanufacturing lines or retrofitted into existing brownfield harvest suites. Optimised for bioprocess scalability, this hermetic disc stack centrifuge provides a reliable, auditable and containment-ready primary clarification step that anchors consistent performance across the full biopharmaceutical and synthetic biology downstream workflow.
