STUDY CONCERNING THE ANALYTICAL CONTROL I N CHEMICAL TREATMENT OF THEHYDROGEN SULFIDE-CONTAINING AND SULFIDES-CONTAINING WATERS DISCHARGEDFROM THE PETROCHEMICAL UNITS

The sour crude oil processing leads to the discharge of waters having a high H2S - and sulphides - content (i.e. 150-200 mg/L versus 1-3 mg/ L as provided in the project) from the petrochemical units. This paper presents the experimental studies performed to remove the H2S- and su lphide - content from the polluted waters, by physico-chemical treatme nt. By applying these studies to commercial scale operations the water s treatment level was increased. The S2- concentration evolution in a physico-chemical water treatment plant is presented, rendering evident the analytic control part played in optimizing the technological proc ess.