Main Reaction: Glycerol + NAD+ >> dihydroxyacetone + NADH

Reference: PubMed ID: 26907554
Authors: Wang J, Lin M, Xu M, Yang ST
Title: Anaerobic Fermentation for Production of Carboxylic Acids as Bulk Chemicals from Renewable Biomass.
Published: 2016

Glycerol + NAD --> dihydroxyacetone + NADH