STUDIES CONCERNING THE BIOLOGICAL TREATME NT ANALYTICAL CONTROL OF THE PETROCHEMICAL COMPLEXES WASTE-WATERS HAVING A HIGH HYDROGEN-SULFIDE AND SULFIDES CONTENT

The H2S and sulphides removal from the waste waters is a very importan t issue due to high sulphur (3-5%) content oil used as raw material. F ollowing the physico-chemical treatment, the final treatment unit gets high S2- content waste waters (i.e. 10-20 mg/L as compared to 1 mg/L as provided). This paper presents the experimental studies meant at re moving this impurifying matter by activated sludge - biochemical treat ment. The importance of the analytical control in optimizing the pollu ted waters biochemical treatment industrial process is evidentiated.