Buchi Digesters and scrubbers

BUCHI SpeedDigester and KjelDigester units together with the Scrubber K-415 form a complete digestion workstation for Kjeldahl and related sample preparation methods. Fast, reproducible sample mineralization is paired with a four-stage scrubber that neutralizes acidic fumes and captures aerosols, enabling safe operation with minimum fume-hood dependence. Modular design lets laboratories scale digestion capacity and combine multiple digesters with a single scrubber for cost-effective throughput.

Key specifications:

• SpeedDigester series (K-425, K-436, K-439) delivers fast reproducible Kjeldahl digestion

• Scrubber K-415 with four-stage neutralization: condensation, adsorption, reaction, neutralization

• 3 L neutralization capacity with visual color indicator for solution status

• Adjustable system suction: 50–400 mbar

• Pump suction rate: 32 L/min

• Activated charcoal adsorption stage for volatile organics

• Optional ECO cooling water valve; upgradeable to QuadScrubECO configuration

Available models:

• SpeedDigester K-425 — infrared-heated digestion unit for medium throughput

• SpeedDigester K-436 — 6-position infrared digester with quick heat-up

• SpeedDigester K-439 — 12-position infrared digester for high throughput

• Scrubber K-415 — fume neutralization for KjelDigester and SpeedDigester models

Applications:

• Kjeldahl digestion for protein and nitrogen determination in food and feed

• Sample preparation for environmental TKN analysis in water and soil

• Digestion of fertilizers and agrochemicals

• Safe handling of acid fumes without a dedicated fume hood

• Chemical and pharmaceutical sample preparation