The production of bio-based platform chemicals, such as lactic acid and succinic acid, is mainly carried out using fermentation processes. Simple sugars such as glucose and sucrose or xylose, which are mainly obtained from maize, sugar cane and cassava, are generally used as substrates. However, their cultivation is often in direct competition with food production and nature conservation. For the implementation of a sustainable and circular bioeconomy, the development of new substrates without existing competing uses is therefore essential. By-products from the processing of residual biomass can meet these requirements.