As the European Union moves towards a circular economy, novel solutions are needed for waste and wastewater management. Sewage sludge is an inevitable by-product of biological wastewater treatment. In 2020, 23.1 thousand tons of dry sewage sludge were produced in Latvian wastewater treatment plants (WWTPs) [1]. Current sludge management approaches include land application, composting and anaerobic digestion which all utilize sludge as an organic fertilizer [1], [2]. Due to the diverse chemical composition of sewage sludge, there are opportunities to recover energy and materials from this waste biomass. Carbohydrates (including cellulose), proteins and lipids are candidates for resource recovery from sewage sludge. This assessment of Latvian municipal sewage sludge will enable selecting the most suitable biochemical resource recovery strategy for each type of sewage sludge.