Processing industrial hemp

Historically harvesting and processing of hemp was a laborious manual task and it was all about the seed for food and cropping, the fibre for rope, sails and other textiles.

Today broadacre hemp farmers use labour saving mechanical advantage to seed, harvest and bail the fresh stems.

The harvested hemp seed needs to be dried and cleaned before being stored cool and dry with minimal air exposure to reduce oxidation and maximise the life force within. Under the Industrial Hemp Act 2004, whole hemp seeds can only be sold by and purchased from Industrial Hemp Licence holders. Only denatured seed, processed to a degree that deems them unviable for propagation (possibly for fear of people growing their own food and remedies) can be legally sold as food to the consumer. Common processes include; roasting, dehulling and cold pressing for oil. Hemp seed oil is good for us internally, externally and environmentally as a biofuel. The additional processing set up and costs need to be considered before choosing to grow hemp for the seed market.

When we have a working seed processing and stem decortication facility farmers will have another good reason to grow hemp.

Traditionally, hemp stalks would be water-retted first before the fibres were beaten off the inner hurd by hand, a process known as scutching. As mechanical technology evolved, separating the fibre from the core was accomplished by crushing rollers and brush rollers, or by hammer-milling, wherein a mechanical hammer mechanism beats the hemp against a screen until hurd, smaller bast fibres, and dust fall through the screen. After the Marijuana Tax Act was implemented in 1938, the technology for separating the fibres from the core remained “frozen in time”. Recently, new high-speed kinematic decortication has come about, capable of separating hemp into three streams; bast fibre, hurd, and green microfibre.

The Schlichten Decorticator US Patent 1919 – 100 years young

The hemp stems offer us three raw products, Fibre (bast or long, thin bark), Hurd (shiv or aggregated inner core) and Microfiber (the fines). The separation of hurd and bast fiber is known as decortication.

Exciting times for the industry in Western Australia

Very exciting news; there are groups of people, within the industry, working to make hemp processing in WA a reality.

We can confirm that there is a stem processing facility being established in Margaret River to produce quality fibre for textiles, hurd for building and hemp powder for myriad use. DecorCo received some government funding and has acquired a decorticator to deal with quality hemp stalks and a hammer mill to deal with the rest of the biomass. They plan to be in production by the end of 2019 and will have the capacity to process 10 tonne per day.

Thanks to all the tireless efforts of those involved this coming growing season will see Margaret River establishing itself as the hemp capital of Western Australia, if not the southern hemisphere.

Related articles

Hemp Foods Dinner Celebration

Founding Father – Hemp Movement of WA

A Hemp Story

Can I build with hemp?

Can I grow hemp?

History of hemp

What is hemp?

Hemp Seed Processing

Hemp Stem Processing