Development of Predictive Models for Disenfectant By-products and Filtration Technology Assessments in Small Community Water Supply Systems

Ahmad, Masood and Husain, Tahir (2015) Development of Predictive Models for Disenfectant By-products and Filtration Technology Assessments in Small Community Water Supply Systems. Research Report. Memorial University of Newfoundland, St. John's, Newfoundland and Labrador.

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Abstract

The main objective of this study was to conduct an in-depth investigation on theformation of disinfectant-by-products in the drinking water supply systems in small communities near St. John’s. This was accomplished by taking water samples fromintake, and from different nodes of water supply system after chlorination (e.g., storage tanks, main transmission lines and residential taps) in communities near St. John’s. Forthis, Torbay and Pouch Cove communities were selected from a detailed investigation. The detailed analysis on the level of Trihalomethnaes and Haloacetic acids was conducted for these two communities with and without filtration. The levels of DBPs in these communities were found much higher than the Canadian guidelines. Other objective of this study was to design a cost-effective filtration system to reduce trihalomethanes (THMs) and haloacetic acids (HAAs) in the drinking water systems. To reduce the concentration of THMs and HAAs, a series of experiments were conducted on tap water from Pouch Cove using an inexpensive adsorbent. The results show more than 95% removal of THMs and a 35% of HAAs in the Pouch Cove drinking water using activated carbon. These preliminary analysis shows a great potential to develop an affordable filtration technology for small communities in the province.

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