Treating waste water of a corrugated cardboard box factory

Abstract

The basic operations used in the laboratory were: coagulation with aluminium. sulphate, flocculation with polyacrylamide, sedimentation, filtering and post-treatment by oxidation with hydrogen peroxide. These processes were applied to the industrial waste water from cleaning the printing machines in a factory making corrugated cardboard boxes. The results of the jar test and the oxidising post-treatment applied to the coagulated and flocculated water are reported as dosage curves. The experimental work carried out showed that discontinuous operations, such as coagulation/flocculation/oxidation, are sufficient for treating industrial waste waters with a high polluting load. These techniques are particularly important when the effluent flow to be treated is not very big.