Assessment of Physical and Chemical Properties in Northern Refineries' Water

This study investigates the physical and chemical characteristics of industrial wastewater from the Northern Refineries Company over a six-month period, aiming to inform the design of appropriate treatment units. Semi-monthly samples were collected from January to July 2023, revealing temperatures ranging from 19 to 38 degrees Celsius, turbidity from 4.1 to 31.2 NTU, and electrical conductivity from 623 to 1517 µS/cm. Total dissolved solids varied between 450 and 980 mg/L, pH ranged from 6.8 to 7.7, and dissolved oxygen levels were notably high, between 1.4 and 7 mg/L. Chloride ion levels 16-19.3 mg/L mostly fell below permissible limits, as did sulfate ions. Phosphate concentrations ranged from 0.01 to 0.14 mg/L, while oil residues fluctuated between 0.54 and 124 mg/L. This research highlights the need for tailored wastewater treatment strategies to address specific contaminants and optimize environmental protection efforts in industrial settings.