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Smart removal of bromides for minimising brominated disinfection by-products in drinking water

Project Number # 1144

Smart removal of bromides for minimising brominated disinfection by-products in drinking water

Project Leader:  Qin Li

Background

Brominated disinfection by-products (DBPs), including bromate, bromodichloromethane, chlorodibromomethane, bromoform, bromoacetic acid, dibromoacetic acid, are strictly regulated. Brominated DBPs are 10 - 104
times more toxic than their chlorinated counterparts.[1] Brominated-DBPs are a major concern commonly encountered where raw water intakes have elevated levels of bromides (Br-). The issue of brominated-DBP formation is
further exacerbated by the effects of climate change, such as increased frequency of extreme events, altered nutrient loading from catchments, and deterioration of source water quality. Therefore, managing bromides in
drinking water treatment has profound significance for achieving the primary target of water utilities, that is to provide safe drinking water.

 

Aim
The aim of this lead project is to identify a feasible and robust treatment method for minimising brominated disinfection-by-products.

 

Benefits

  • A new cost-effective chemical (modified Alum) that can combine effective removal of bromides with other required functions;
  • A model-based control system for water treatment for achieving minimisation of brominated DBPs;
  • Fundamental understanding on the chemical design for selective halide ion removal.