Solid-State Microwave Assisted Vacuum Dryer

Magnetron-based systems generate microwave energy through vacuum tubes with limited frequency tunability and shorter lifespans. Solid-state systems use semiconductor amplifiers to produce precisely controlled, frequency-agile microwave energy with greater stability, longer service life, and superior process repeatability.

Vacuum reduces the atmospheric pressure inside the drying chamber, lowering the boiling point of water. This allows moisture to evaporate at much lower temperatures (as low as 15–20°C under deep vacuum), preventing thermal degradation of heat-sensitive compounds.

Yes. Kerone integrates explosion-proof electrical components and solvent recovery condensers into the system design, enabling safe processing of materials containing flammable organic solvents under vacuum.

Solid-state microwave generators allow frequency tuning and multi-mode cavity design, which distributes microwave energy uniformly throughout the product. Combined with product rotation or mixing mechanisms, this eliminates hot spots and ensures consistent moisture removal.

The system handles liquids, slurries, granules, powders, sheets, and solid cakes. Product trays, rotary drums, and continuous belt configurations are available depending on product form and batch requirements.

Yes. Kerone's pharmaceutical configuration includes 316L SS construction, CIP/SIP capability, 21 CFR Part 11 compliant data systems, and full IQ/OQ/PQ validation support.

Power levels range from 1 kW (lab scale) to over 100 kW (industrial scale). Selection is based on product load, moisture content, thermal sensitivity, and required throughput — all determined during Kerone's application engineering phase.

Solid-State Microwave Vacuum Drying is significantly faster than lyophilisation, reducing drying cycles from 24–72 hours to 1–4 hours in many applications, while achieving comparable or superior product quality at substantially lower capital and operating costs.

The system processes liquids, slurries, granules, powders, sheets, and solid cakes, with configuration adjusted through product trays for static loads, rotary drums for materials needing continuous mixing during drying, or continuous belt systems for high-throughput operations. Applications span pharmaceutical API and lyophilized formulation drying, nutraceutical production preserving probiotic and enzyme potency, specialty food processing for premium ingredients like saffron and marine bioactives, advanced materials processing for nanomaterials and aerogels, cannabis and botanical extraction requiring rapid solvent removal, and biotechnology applications involving fermentation-derived products and protein powders. The common thread across these diverse applications is a need for precise, low-temperature moisture or solvent removal where product quality justifies investment in more sophisticated drying technology than conventional alternatives offer.

Pharmaceutical configurations should include 316L stainless steel construction with electro-polished interior surfaces meeting CIP and SIP cleaning validation requirements, 21 CFR Part 11 compliant data systems for electronic record integrity, and full IQ, OQ, and PQ validation support to satisfy installation, operational, and performance qualification requirements regulators expect during facility audits. Buyers should request documentation packages covering material certifications for product-contact surfaces, validated cleaning protocols, and data logging capability that captures process parameters for each batch in a format suitable for regulatory submission. Since GMP compliance requirements vary somewhat by region and specific regulatory body, it is worth confirming with the supplier early in the specification process that documentation will meet the standards of the buyer's specific regulatory jurisdiction rather than a generic international baseline.

Reducing atmospheric pressure inside the drying chamber lowers the boiling point of water significantly, allowing moisture to evaporate at temperatures as low as 15 to 20°C under deep vacuum conditions rather than the 80 to 100°C typically needed at atmospheric pressure. This is critical for pharmaceutical actives, probiotics, enzymes, and botanical extracts that degrade or lose bioactivity when exposed to elevated temperatures for extended periods. Combining this low-temperature vacuum environment with solid-state microwave's precise volumetric heating means moisture can be removed quickly throughout the product mass without the thermal stress that either atmospheric-pressure drying or less controllable heating methods would introduce, preserving potency and structural integrity in materials where quality degradation directly impacts product value.

Because the system is available across bench-scale research units, pilot-scale process development systems, and full industrial-scale configurations sharing the same underlying solid-state microwave and vacuum technology, companies can develop a new formulation on a small research unit and scale findings through pilot trials to full production with greater confidence that the fundamental drying mechanism will behave consistently across scales. This is particularly valuable for pharmaceutical and nutraceutical companies with active development pipelines, where today's R&D project becomes tomorrow's commercial product requiring rapid scale-up. Multi-zone heating configurations with independent power control also allow a single industrial unit to handle heterogeneous or layered product loads, supporting manufacturing flexibility as a company's product portfolio diversifies beyond its original target application.

A frequent misconception is assuming that drying parameters validated on a 1 kW bench-scale research unit will transfer directly and proportionally to a full industrial-scale system simply by increasing power output. In practice, scale-up involves additional engineering considerations around multi-zone heating configuration, product load distribution within a larger chamber, and maintaining the same uniform volumetric heating and vacuum conditions across a much larger product mass that the bench unit achieves easily with its small load. Kerone's approach of validating drying protocols through dedicated process development labs before equipment commissioning exists specifically to address this scale-up risk, and buyers moving from R&D to production volume should expect a structured pilot-scale intermediate step rather than jumping directly from lab trials to full industrial deployment.

Processing organic solvent-based materials requires explosion-proof electrical components rated for the specific solvent classification being handled, combined with integrated solvent recovery condensers that capture evaporated solvent vapor for recovery or safe disposal rather than allowing it to accumulate within the vacuum chamber or escape into the facility environment. This dual approach of hazard-rated electrical design and active vapor capture allows safe processing of materials such as cannabis and botanical extracts where solvent removal is a core part of the manufacturing process. Buyers working with specific solvent classes should confirm with their supplier that the electrical classification and condenser recovery capacity match their particular solvent's volatility and flammability characteristics, since requirements differ between, for example, ethanol-based extracts and other organic solvent systems.