Industrial wastewater contains many pollutants. This book is focusing on heavy metals found in textile effluents because of their known toxicity effect in the environment. Wastewater from a textile industry (UTEXRWA) in Rwanda has been screened for the occurrence of Cd, Cr, Cu, Pb and Zn. Batch and pilot experiments on adsorption equilibrium, kinetics and sulfide precipitation using volcanic rock as adsorbent and packing material have been investigated. A low cost and integrated system for treatment has been developed; combining an anaerobic bioreactor as main treatment step followed by a...