E. Łaskawiec, M. Dudziak, J. Wyczarska-Kokot
Silesian University of Technology, Institute of Water and Wastewater Engineering, Gliwice, PL
SELECTION OF CONDITIONS OF WATER RECOVERY FROM THE STREAM OF WASHINGS FROM THE SWIMMING POOL WATER SYSTEM
This study discusses the results of the preliminary tests use an integrated process coagulation-sedimentation-nanofiltration for the purification washings from swimming pool water treatment circulation. Studies included the effect of the terms and conditions of the preparatory process (coagulation where range of doses of coagulant 1.5 ÷ 3.0 mgAl/L and sedimentation where the scope of duration 0.5 ÷ 24 h) on the transport and separating properties nanofiltration membranes. Comparatively, the process of nanofiltration of raw soils has been performed. A higher value of volumetric permeate flux was observed during the nanofiltration process for washings after coagulation process with dose 1.5 mgAl/L. There has also been significant improvement in transport capacity of the membrane with increased sedimentation time (to 24 hours). The presence of sediment molecules, which contributed to the reduction of the process efficiency during filtration of washings after coagulation with dose 3.0 mgAl/L, at the same time they caused a gradual increase in membrane separation capacity. A secondary membrane having a lower porosity than the primary membrane has been produced. The use of the integrated system has improved the transport conditions of the nanofiltration membranes, reduction of residual aluminium concentration, as well as significant improvements in other physicochemical parameters (inter alia, general slurry, ultraviolet absorbance UV254).
Keywords: integrated process, washings nanofiltraton, coagulation