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Progress of Model Joint Research Activities

Research No. 4: TC Model Joint Research (Environment) Date: Oct. 20 , 2019
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Sustainable application of biochar from green biomass to
1 General Title mitigate greenhouse gases emission from paddy fields and to
improve soil ecology in the Mekong Delta
CTU: Nguyen Huu Chiem (Project Leader), Nguyen Xuan Loc (Project Secretary),
Nguyen Van Cong, Tran Sy Nam
2 Core Members
Japanese Universities: OKAYAMA Takayuki (TUAT), TARAO Mitsunori (TUAT), HAYASHIDANI
Hideki (TUAT), OIKAWA Yosei (TUAT), KOSE Ryota (TUAT), MIYANISHI Takayuki(Nagasaki)
3 Duration May 2017 – May 2019 (2 years)
1. Mitigating greenhouse gases emission
4 Main Objectives 2. Improving soil ecology and fertile
3. Contributing to the increase income of the farmers in the Mekong delta
5 Focal Points Properties of Biochars Prepared from Local Biomass in the Mekong Delta, Vietnam
Objective: To explore the possibilities of utilizing locally available biomass for producing carbon-rich and nutrient-enriched
biochars.
❑ Wood- (bamboo and melaleuca) and herbaceous-based (rice husk and water hyacinth) biochars were produced from local biomass by
slow pyrolysis at 500, 700, and 900 °C.
❑ The wood-based biomass produced biochars with a lower ash content, higher HHV, higher degree of aromaticity, and relatively same
amount of salt nutrients compared with those of the herbaceous-based biochars.
❑ The rice husk biochars contained more than 300 g/kgdb silica.
❑ The water hyacinth biochars with the greatest volatile matter/fixed carbon, H/C, and O/C ratios had the lowest aromaticity → maybe
least suitable for carbon sequestration.
❑ The water hyacinth biochars also possessed a higher soluble salts content, electrical conductivity, pH, and liming potential → may not be
suitable for low-buffer capacity soils.

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Future studies: This study was funded in part by the TC Project “Building capacity
• Soil biochar application for soil ecology improvement
• Biochar utilisation for wastewater treatment for Can Tho University to be an excellent institution of education,
scientific research and technology transfer” of JICA

Comments This research is published online at https://bioresources.cnr.ncsu.edu/issues/vol13-issue4/

ⓒ All Rights Reserved, Dec. 2019 (CTU)

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