Identification of treatment conditions which minimise DBP formation
Disinfection by-products (DBPs) are formed from the reaction between an oxidative disinfectant (such as chlorine or ozone), and organic and inorganic precursor compounds, usually natural organic matter or bromide ions. This research sought to determine the relative importance of different DBPs and the factors that influence their formation, with the objective of developing a practical guide to assist water companies in managing DBPs. This was achieved through a literature review of toxicity data to establish a ranked list of priority DBPs. Extensive laboratory investigations were undertaken to determine the influence of different treatment processes on precursor removal across five different chemical groups of DBPs (21 individual compounds) for different types of water source. Samples were also taken across drinking water treatment works to validate the laboratory results. The toxicity data was used to assess potential risk (the hazard index) and the relative importance of DBPs shown to change for different water sources and treatment processes. A limited number of DBPs were dominant in the overall assessment of hazard index. These were principally the haloacetic acids, specifically those that incorporated bromide into their structure. However, when present, the nitrogenous DBPs were also important. Guidance was developed on the operation of different treatment processes for minimisation of the priority DBPs.
|UKWIR Reference :- 20/TX/05/3||Published Date :- 15/07/2020|
|Retail Price (£) :- 300||ISBN :- 978-1-84057-892-8|
Supporting Material and Reports
| 20/TX/05/3 CD|