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Tromso Co., Ltd.

Biofuel: Rice Husk Briquette Machine

Rice Husk Briquette Machine to Produce Useful Fuels


Tromso Co., Ltd.’s rice husk briquette machine (called the Grind Mill) uses often-underutilized rice husks to produce useful fuels. It works via a machine that grinds and compresses rice husks, producing solid briquette fuels called “Momigalite”. No binders or adhesives are needed, which represents its greatest feature. Momigalite can be used in place of firewood or charcoal, boosting forest preservation efforts.

The machine was first created based on ship-building industry technology in Hiroshima, Japan. Due to the high level of silica in rice husks, core parts typically wear out easily with conventional machines. However, Tromso’s technology utilizes a special metal applied to the surface for added durability.

Momigalite can be used as a substitute fuel in the event of a disaster, and this technology can be utilized in residential households, commercial restaurants, schools, etc.

Major Features

I. Robust and Durable Core Parts
The rice husk briquette machine has core parts that are extremely robust and durable, contributing to a long life span. This results in the ability of the machine to operate for 400 hours before replacement is required. Conventional parts, on the other hand, will wear out after 24 to 48 hours of operation.

II. High Production Capability
The rice husk briquette machine is capable of producing 120kg of solid briquette per hour, which equals about one ton in eight hours.

III. Sustainable Use of Natural Resources
In just one year, Japan burns or disposes of 2.5 million tons of rice husks. Around the rest of the world, 200 million tons of rice husks are discarded or burned. This technology allows those natural resources to be used for a sustainable purpose.

IV. Dependability
Momigalite is simple to prepare and use, leading to dependability in any environment.

V. Potential for More Experimentation
In addition to rice husks, this technology can also be used for corn husks. Moreover, the company has begun experimenting with peanut hulls. This will allow the equipment to make a humanitarian contribution to areas in Africa affected by fuel shortage, famine and poverty. Experimentation with peanut hulls is still in the development phase.
Since 2007, Tromso has made rice husk briquette machines, selling more than 70 machines, with 15 machines exported to Tanzania, Nigeria, China and Vietnam.

Technology Data

Conceivable Applications
The rice husk briquette machine can produce useful fuels by using often-underutilized rice husks. The machine grinds and compresses rice husks with heat producing solid briquette fuels without using any binders or adhesives. The rice husk briquettes can be used as substitutes for firewood or charcoal, which contribute to forest preservation.

Competitive Advantage
The competitive advantages of the rice husk briquette machine are the robustness and the durability of the core parts. The machine was developed based on the shipbuilding industry technology in Hiroshima, Japan. As rice husks contain high level of silica, core parts are normally worn out easily. At Tromso, special metal is applied to the surface of the parts so that the parts become durable resulting in the ability of operation for 400 hours before replacement while conventional parts without this surface treatment will be worn out in 24 hours to 48 hours.

The machine can produce 120kg of solid briquette per hour (approximately one ton in eight hours).

Technical maturity / Past record of introduction
Tromso has manufactured rice husk briquette machines since 2007 and already sold more than 70 machines since the establishment. We have exported 15 machines to Tanzania, Nigeria, China and Vietnam.

Country Year Past Record of Introduction Provider Production Capacity / Machine User
Tanzania*[PDF] 2015 4 JICA 1t / day Kilimanjaro Industriial Development Trust
Tanzania*[PDF] 2015 4 JICA 1t / day Small Industry Development Organization
Tanzania 2015 1 Private 1t / day A private company
Nigeria 2015 1 Private 1t / day Ebony Agro (rice processor)
China 2015 1 Private 1t / day N/A
Vietnam 2015 4 Private 1t / day N/A
Japan 2009 – 2016 70 Private 1t / day Private companies

* Tromso Co., Ltd. and E-Square Inc. (2014) “Project Formulation Survey” under the Governmental Commission on the Projects for ODA Overseas Economic Cooperation in FY2013 Final Report Tanzania: Study on an Introduction of Rice Husk Briquette Machine Summary Report.

Moshi, Tanzania

Mbeya, Tanzania

Conceivable risk
Although we do not experience difficulties in operating the machines, the users have to find market for rice husk briquettes by themselves. Also, the availability and affordability of rice husks are important for the constant operation of the machine.


Schematic illustration of the technology

(*Note: The converting process from peanut husks to fuel is under development, and rice husk briquettes as raw material are strongly recommended as of July, 2016.)


SADC-Japan Business Investment Forum on 28 February, 2019 [Osaka]
Tromso’s rice husk briquette machine supplied in Madagascar
Experts from Indonesia, Myanmar and Vietnam visited Japan, 16-21 July 2018
ITPO Tokyo participated in Smart Engineering Tokyo 2018
Seminar on water supply and wastewater treatment in Asia held on 19 July 2018

Company Data

Company Name
Tromso Co., Ltd.
5265, Shigei-cho, Innoshima, Onomichi City, Hiroshima, Japan
The Type of business
Manufacturing of rice husk briquette machine
JPY 3 million
Number of enployee
6 (including 3 for international operation)
May, 2009


Contact person
Mr. Masaaki UESUGI
Tel: +81-845-24-3344
Tel: +81-845-24-3181

※This innovation seed information is reprinted with permission from UNIDO ITPO Tokyo’s STePP website.

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