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Health risk assessment associated with the reuse of compost, urine and greywater in agricultural field in sahelian climate.

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par Alexis Loukou BROU
Fondation 2iE - Master Environnement option Eau et Assainissement 2014
  

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1.2.2. Ingestion of irrigated greywater

The probabilistic values of all treatments compared with the WHO guideline values of risk for ingestion of irrigated greywater scenario are showed in the table 10 below. Salmonella annual risk of infection in worst case from C+U+GW (1.53x10-3) is higher than GW (1.02x10-4). The annual risk of infection in all treatment exceeded the tolerable risk of =10-6 per person per year (WHO, 2006a).

Table 10:Probabilistic values of Greywater and Compost, Urine and Greywater treatments compared with the WHO guideline values of the risk.

Pathogen

Treatment

WHO guideline values

GW

C+U+GW

10-6

Salmonella

1.02x10-4

1.53x10-3

Probabilistic values of Greywater and Compost, Urine and Greywater treatments compared with the WHO guideline values of the risk are showed by figure 10 below.

Figure 10 : Probabilistic values of Greywater and Compost, Urine and Greywater treatments compared with the WHO guideline values

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