Plasma Technology Speeds Up Duckweed Washing in Thailand
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The article explains that duckweed (also called water lentil) is a nutritious, easy‑to‑grow plant used in many food forms. When production expands, cleaning becomes a bottleneck because manual washing is slow and labor‑heavy. Assoc. Prof. Dr. Rungtawan Yomlah from the Faculty of Agricultural Technology at King Mongkut’s Institute of Technology Ladkrabang led a team that evaluated ozone and nano‑bubble technologies before selecting plasma treatment. Plasma generates reactive oxygen species that kill microbes and break down DNA, enhancing safety. The designed system includes a plasma generator (600 mm × 600 mm × 1800 mm) linked to a duckweed‑water spinner (1200 mm × 600 mm × 1650 mm) with automatic control. Treated water washes the duckweed before spinning it dry for packaging. The plasma washer can clean 50 kg of duckweed in five minutes, drastically reducing labor and time compared with manual methods.
