Kenya Thunguri AA | fully washed

The Thunguri factory is located in the Kirinyaga county in an area of lush green valleys that produce tea, often alongside coffee. It is affiliated to the Kibirigwi Farmers Co-op Society of which there are seven factories in total. There are now 1,500 active members of the Thunguri factory and each member has on average around half a hectare of land for coffee growing alongside macadamia, beans, banana, tea and maize. The area has deep, well drained and fertile red volcanic soil at altitudes of between 1,700 and 1,800 metres above sea level.

The Thunguri factory consistently produces some very good coffees year in, year out. The coffee is handpicked by the smallholder members and delivered to the Thunguri factory where it gets pulped. This initially separates the dense beans from the immature mbuni’s (floaters) using water floatation which means the denser beans will sink and be sent through channels to the fermentation tank.

This first stage of fermentation will last for around 24 hours, after which the beans are washed and sent to the secondary fermentation tank for another 12-24 hours. Once the fermentation process is completed, the beans enter the washing channels where floaters are separated further and the dense beans are cleaned of mucilage.

The washed beans will then enter soaking tanks where they can sit under clean water for as long as another 24 hours. This soaking process allows amino acids and proteins in the cellular structure of each bean to develop which results in higher levels of acidity and complex fruit flavours in the cup – it is thought that this process of soaking contributes to the flavour profiles that Kenyan coffees are so famous for.