NEWS FROM REAL RESEARCH HUB

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Tender Opportunity: Screening impact on digestate quality

Posted: 13 November, 2024. Written by Megan Muller-Girard

The Research Hub seeks a contractor for a project titled “Appraisal of the impact on digestate quality with a final screening step, from introduction of a smaller screen size.”

The project aims to help operators identify effective technologies for reducing plastic contamination while preserving nutrient content of final digestate products, and to evaluate if small changes in screen size affect digestate quality factors beyond physical contaminants.

The work will involve laboratory analysis of digestate samples from digesters processing various feedstocks and screened through a range of screen sizes. Key objectives include:

1. To compare the relative proportions of nutrients and contaminants (and their nature) in the final liquor and fibre/screenings for different screen sizes used.
2. To determine compliance of digester outputs with PAS110 for each group of screened materials.
3. To determine the relative significance of any differences in digestate quality identified in material screened at different screening size.

The outcomes may help to determine which parameters, other than physical contaminants, may need re-validation (for PAS 110/BCS compliance) when screen size is reduced.

For full details and submission instructions, see the Tender Invitation Document (here). Questions? Contact Jackie Robinson at jackie@recc.org.uk by Friday 29th November.

Submission Deadline: Friday 20th December 2024.