Scientists improve Vietnam’s coffee with enzyme technology

Last update 08:10 | 24/03/2017
VietNamNet Bridge – Dry processed coffee has low quality, but wet processing needs a large volume of water, causing pollution. What is the solution? 

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A technology for wet processing using enzymes can improve quality and reduce water usage.

There are two major methods – wet and dry processing – to process harvested coffee beans. In the traditional method of dry processing, coffee beans are cleaned and dried under the sun for 7-10 days before they are husked,

In bad weather with too much rain and little sun, farmers have to dry coffee beans with driers, but this lowers the coffee quality if the temperature of driers is incorrect.

With the wet processing method, coffee beans are soaked while they are rubbed and put for fermentation, which lasts one to three days.

Dry processed coffee has low quality, but wet processing needs a large volume of water, causing pollution.

After that, they are cleaned, husked and dried. The advantage of the method is that it does not depend on weather conditions and runs more quickly.

However, Nguyen Van Lang, former Deputy Minister of Science & Technology, and former chair of Dak Lak province, the coffee metropolis of Vietnam, said both methods show weak points.

Dry processing coffee has low quality, while wet processing can only help a little in improving quality, but consumes much water and causes pollution.

Lang said he understood the difficulties of dry processing. “It is very costly to build yards for drying. One hectare of drying yard is needed for every 100 hectares of coffee. The yard is used for several months every year,” he said.

Lang decided to join forces with Bui Van Luan to work on a wet processing coffee technology with enzyme which does not discharge water – bioecotec.

Harvested coffee beans will be sorted to eliminate impurities, cleaned and put into a system to separate nuts. After that, they will be put into static dryer for drying and covered with enzymes to accelerate the removal of mucilage.

Since farmers don’t have to use water to remove mucilage, they can save money and minimize the impact on the environment.

Lang said bioecotec technology has been protected by intellectual property rights and used by many households in the Central Highlands.

Other research units in Vietnam have also mastered the wet processing technology with enzymes and proved the advantages of the method.

A research work by the Western Highlands Agro-Forestry Scientific and Technical Institute found that with 120-150 grams of enzymes, processing units can remove mucilage for one ton of coffee within the day. And if they keep coffee with enzymes overnight, they would need 50-60 grams of enzymes only.


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This entry was posted in Nông nghiệp - Agriculture and tagged , by Trần Đình Hoành. Bookmark the permalink.

About Trần Đình Hoành

I am an attorney in the Washington DC area, with a Doctor of Law in the US, attended the master program at the National School of Administration of Việt Nam, and graduated from Sài Gòn University Law School. I aso studied philosophy at the School of Letters in Sài Gòn. I have worked as an anti-trust attorney for Federal Trade Commission and a litigator for a fortune-100 telecom company in Washington DC. I have taught law courses for legal professionals in Việt Nam and still counsel VN government agencies on legal matters. I have founded and managed businesses for me and my family, both law and non-law. I have published many articles on national newspapers and radio stations in Việt Nam. In 1989 I was one of the founding members of US-VN Trade Council, working to re-establish US-VN relationship. Since the early 90's, I have established and managed VNFORUM and VNBIZ forum on VN-related matters; these forums are the subject of a PhD thesis by Dr. Caroline Valverde at UC-Berkeley and her book Transnationalizing Viet Nam. I translate poetry and my translation of "A Request at Đồng Lộc Cemetery" is now engraved on a stone memorial at Đồng Lộc National Shrine in VN. I study and teach the Bible and Buddhism. In 2009 I founded and still manage on positive thinking and two other blogs on Buddhism. In 2015 a group of friends and I founded website CVD - Conversations on Vietnam Development ( I study the art of leadership with many friends who are religious, business and government leaders from many countries. In October 2011 Phu Nu Publishing House in Hanoi published my book "Positive Thinking to Change Your Life", in Vietnamese (TƯ DUY TÍCH CỰC Thay Đổi Cuộc Sống). In December 2013 Phu Nu Publishing House published my book "10 Core Values for Success". I practice Jiu Jitsu and Tai Chi for health, and play guitar as a hobby, usually accompanying my wife Trần Lê Túy Phượng, aka singer Linh Phượng.

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