Health Risk Assessment For Sewage Sludge
Applied To Land In France
Author(s)
L. Déléry, G. Gay, S. Denys, H. Brunet, I. Déportes,
A. Cauchi & M. Aupetitgendre
Abstract
Chemical and microbial health risks associated with the application of municipal
and industrial sewage sludge to agricultural land were addressed in order
to set guidelines within the French legislative context. The chemical part
was a quantitative risk assessment study based on the simplified
source-pathway-receptor event tree approach. The selected chemicals were those
quoted in the French legislation. Several receptors were considered: population
consuming vegetables and meat impacted by the sludge application, nearby
populations also walking close to fields receiving sludge, farmers plowing such
fields, and future residents consuming their own vegetables on former fields. The
assumptions and the uncertainties of the approach were discussed. The first
quantitative results led to acceptable risk levels, and allowed one to identify the
major exposure pathways. The microbial part was a feasibility study based on a
literature review. In spite of many uncertainties, a preliminary quantitative risk
assessment case study for Enterovirus, Salmonella, E. coli O157 :H7 and
Cryptosporidium parvum was developed in order to identify the critical points of
the process and to judge its relevance within the national context. Uncertainties
of the quantitative risk approach were discussed in detail and led to the proposal
of qualitative guidelines based on an event tree, due to the current state of
knowledge.
Keywords: sewage sludge, chemical and microbial health risk assessment,
France.
Keywords
sewage sludge, chemical and microbial health risk assessment,
France.
Related Book
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