REVIEW OF HEALTH-RELATED ASPECTS OF BIOSOLIDS LAND APPLICATION
Abstract:Under direction of Ottawa City Council (Ontario, Canada), the Medical Officer of Health (MOH) retained a consultant team to review health-aspects of land application of anaerobically digested, dewatered biosolids. At the time, in response to public concern, Council had suspended the land application program pending the outcome of the MOH's recommendation. The team had three months to complete the review before the next spreading season.
The investigation focused on three groups of contaminants which had been identified by an earlier Water Environment Association of Ontario study as “not having sufficient, credible evidence to demonstrate they are not of concern in sewage biosolids”, namely:
Estrogenic hormones and pharmaceutically active compounds
Also the “emerging issues” of polybrominated diphenyl ethers (PBDEs) and odour-related health effects were identified. The review included both a literature search and interviews with specialists reflecting the spectrum of views on these topics. A review of health studies was added to provide an overall perspective on the information collected. The lack of rigorous case reports and epidemiological investigations relevant to the particular product and application methods in use was noted.
The paper summarizes the findings in each of these areas which lead the MOH to recommend the resumption of land application with the implementation of proposed Best Management Practices and ongoing monitoring of both application processes and the scientific literature. Nevertheless, Ottawa City Council elected to end land application of anaerobically digested, dewatered biosolids based on odour-related symptom experiences of residents near to application sites.
Document Type: Research Article
Publication date: January 1, 2003
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- ingentaconnect is not responsible for the content or availability of external websites