Friday 13 December 2019
Home      All news      Contact us     
reliefweb - 11 days ago

Uganda: Characterization of Disinfection By-Products Levels at an Emergency Surface Water Treatment Plant in a Refugee Settlement in Northern Uganda

Source: UN Children s Fund, WASH Cluster Country: Uganda
The reliance on chlorination in humanitarian operations has raised concerns among practitioners about possible health risks associated with disinfection by-pr however, to date, there has not been an evaluation of disinfection by-product (DBP) levels in an emergency water supply intervention. This study aimed to investigate DBP levels at a surface-water treatment plant serving a refugee settlement in northern Uganda using the colorimetric Hach THM Plus Method. The plant had two treatment processes: (1) Simultaneous clarification–chlorination (“rapid treatment”); and (2) pre-clarification and chlorination in separate tanks (“standard treatment”). For both standard (n = 17) and rapid (n = 3) treatment processes, DBP levels in unique parcels of water were tested at 30 min post-chlorination and after 24 h of storage (to simulate what refugees actually consume). DBP levels after 24 h did not exceed the World Health Organization (WHO) guideline limit of 300 ppb equivalent chloroform, either for standard treatment (mean: 85.1 95% confidence interval (C.I.): 71.0–99.1 maximum: 133.7 ppb) or for rapid treatment (mean: 218.0 95% C.I.: 151.2–284.8; maximum: 249.0 ppb). Observed DBPs levels do not appear to be problematic with respect to the general population, but may pose sub-chronic exposure risks to specifically vulnerable populations that warrant further investigation.


Latest News
Hashtags:   

Uganda

 | 

Characterization

 | 

Disinfection

 | 

Products

 | 

Levels

 | 

Emergency

 | 

Surface

 | 

Water

 | 

Treatment

 | 

Plant

 | 

Refugee

 | 

Settlement

 | 

Northern

 | 

Uganda

 | 
Most Popular (6 hours)

Most Popular (24 hours)

Most Popular (a week)

Sources