Renewable energies can be produced based on of briquettes under utilisation of by-products from agriculture and grain processing plants. These materials may help satisfy the increasing demand of renewable energies. Due to their structure, many of these by-products require a binder for briquetting. For these studies wheat bran, rye flour, straw and particles of grand fir have been briquetted in addition of lignin, protein and starch as natural binders. Determined parameters for the quality of the briquettes were the density, the internal bond strength, the transportability and the heating value. It was observed, that lignin and protein are suitable bonding agents for this process, whereas starch is not suited. The heating value was not influenced by the different kinds of bonding agents.