An experimental leaf protein and biogas production plant was installed at the farm Uzvara and run for many years. A semiclosed wasteless biotechnological system for green biomass processing was demonstrated to be effective under normal conditions. Today, non-food products production from agricultural raw materials is more important as compared with feed protein production in conditions of the market economy in Latvia. Sugar beet yields the maximum amount of fermentable sugars from a given land area, while cereals allow to extend the production time. Alfalfa is an excellent protein producer and can enrich soil with nitrogen.
Rape is a good raw material for biodiesel production.
These crops are good candidates as the raw material for biofuel products production in Latvia. An example of biofuel production, using a semiclosed biotechnological system, is demonstrated in Fig 1. Despite the weak economic parameters of biofuel production in Latvia, the draft of the proposed national programme provides a potential impetus to a sustainable development of agriculture and protection of environment. The worldwide literature was analysed when planning the initial experiments. References M.Bekers, J.Shvinka, L.Pankova, M.Laivenieks, I.Mezhbarde.