EN
Composition of wastewater is complicated. It is rich in micro- and macroelements, plus many carbon species. During wastewater treatment carbon changes chemical form and creates sewage sludge as a by-product. Sewage sludge is rich in nutrients and organic compounds, and possesses a potential soil-forming value. Hence it can improve soil properties, especially when applied to poor sandy soils or sludge. The last part of carbon changes occur in soil when organic matter is produced across specialized microorganisms. The aim of our current work is to present the main carbon fractions in three environmental matrices: wastewater, sewage sludge, and soil.