Polyelectrolyte Dosage Control System for Water Filtration,
Abstract
The purpose of this investigation was to evaluate five proposed methods for polyelectrolyte dosage control. These methods were: Sedimentation Potential, Turbidity Titration, turbidity Correlation, Filtrate Turbidity, and Filter Streaming Potential. The five proposed methods were investigated using the bench scale sand filters. Both synthetic and natural water samples were used. The experimental program consisted of three phases. The optimum polyelectrolyte dosage for sand filtration operation were established in the first phase of the study. The five proposed methods were then evaluated in the second phase of the study. The most promising methods were studied in detail in the third phase. A conceptual design of the best alternative(s) was to be the outcome of the report. Both turbidity titration and turbidity correlation were found to be ineffective in predicting the optimum polyelectrolyte dosage. They were eliminated from further study. Filter streaming potential did not give a clear indication of the optimum polyelectrolyte dosage when the sand particles were coated with polyelectrolyte. Furthermore, the method failed to predict the optimum polyelectrolyte dosage when the water was highly heterogeneous. Thus, it was decided that this method did not provide a viable means for polyelectrolyte dosage control. The investigation has produced two viable methods for polyelectrolyte dosage control. Of these two methods, filtration turbidity could be adapted to an on-line continuous system. Sedimentation potential is essentially a batch system and would require further work to develop it into a continuous system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1981
- Accession Number
- ADA097016
Entities
People
- Mary L. Schurger
- Wen K. Shieh
Organizations
- IIT Research Institute