Production of biochar and insect repellent from rice husk waste. During its use in agriculture, biochar retains nutrients and water, and stores carbon for soil regeneration and for improved water and fertilizer use efficiency.

This business case study was prepared within the framework of the Technical Advisory project: Mobilising Business Action for Circular Economy in the ASEAN countries under the EU SWITCH-Asia Policy Support Component for the sole purpose of documenting and analysing business experiences with the circular economy. The case study was produced by Ratana Phurik-Callebaut (national expert, Cambodia) and reviewed by Rene Van Berkel and Thomas Thomas (regional experts) on the basis of information provided and validated by Husk Ventures, Cambodia.