Anoxic and Anaerobic Wastewater Treatment in Presence of Aromatic Hydrocarbons

Advance biological wastewater treatment is performed in various ORP conditions including anaerobic, anoxic and oxic processes. For removal of specific industrial and petrochemical contaminants such as: aromatic hydrocarbons (BTX), the anaerobic treatment is recommended as the adequate alternative for their removal. Anaerobic treatment process is well known as an efficient method to degrade high strength wastewater. For investigations of the treatment processes in laboratory conditions, anoxic reactor of the 5 L volume working on the HRT value of 20 h as well as anaerobic reactor of the 2,5 L and the value of HRT 72 h and 144 h were used. The concentration of aromatic hydrocarbons in municipal wastewater amounted to between 1.0 to 12.0 mg/L. A moderate negative influence of these compounds on COD removal in anoxic and anaerobic processes has been shown.