A big fraction of the measured inorganic content of the conventional sludge is actually hard degradable organic substance as well as inorganic salts. The Ydro Process® decomposes this big fraction and breaks down these inorganic salts releasing inorganic ions in the output such as: Ca2+, K+, Na+, Mg2+ etc. The remaining inorganic content is removed by the sand and grit removal stage as well as the fine screening and is sent to landfills.