Information document (ID) on Risks from Sewage Sludge Drying Plants HSE (0)
1 This guidance is issued by the Health and Safety Executive. Following the guidance is not compulsory and you
are free to take other action. But if you do follow the guidance you will normally be doing enough to comply with
the law. Health and safety inspectors seek to secure compliance with the law and may refer to this guidance as
illustrating good practice.
2 This guidance covers thermal dryers for sewage sludge’s; however the guidance is likely to be applicable to
other organic wastes with similar properties to sewage sludge.
Dried sludge, usually in the form of granules/pellets, has the advantage of being easily stored and has reduced
transportation costs. Sewage sludge after mechanical dewatering contains around 25% dry solids as compared
to dried sludge, normally 85-95% dry solids. Thermal dryers can also be used as pre-treatment for other
processes, and elements of this guidance will be applicable to those where the dry solids may be up to 45%
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HSE (0). Information document (ID) on Risks from Sewage Sludge Drying Plants HSE
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Information document (ID) on Risks from Sewage Sludge Drying Plants
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