The Moi family is said to be Kenya's second-largest landowner.
Increased productivity will see the company pass on the resultant price benefits to consumers.
The multimillionaire has invested $16.7 million in upgrading the unit.
Founded in 1971, Mumias Sugar was once the largest sugar manufacturer in Kenya.
Kenya’s health secretary has identified the hoarding of empty oxygen cylinders as an obstacle in the fight against COVID-19.