Sewage sludge: odour emissions assessment
This report is part of the research project undertaken by the James Hutton Institute on the impacts on human health and environment arising from the spreading of sewage sludge to land (CR/2016/23).
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3. Sources of Sludge Cakes
The lime treated (LIMED) cake originated at the Scottish Water Kinneil Kerse works where it was treated with "Neutralac" liquid lime treatment for sanitisation. Measurements were carried out on field stockpiles on a farm in the Alloa area with the cooperation of Scottish Water and a local contractor.
The anaerobically digested and dewatered sludge cake (AD) was sourced from the Borders treatment plants at Galashiels and the measurements were carried out on field stockpiles on a farm in the St Boswell area with the cooperation of Scottish Water.
Anaerobically digested, thermal hydrolysis process (THP) dewatered sludge cake was sourced from the Seafield treatment plant (Edinburgh) and the measurements were carried out on field stockpiles on two farms in the Peebles area with the cooperation of Veolia and their local contractor.
The objectives were to sample two different ages of cake of each of the three types, although abnormal spring weather conditions created some constraints on the availability of cakes of differing ages.
Sampling was carried out on the 18th April (LIMED cake) and the 19th April 2018 (THP and AD cakes).
Contact
Email: gary.gray@gov.scot
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