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Title: Shear strength characteristics of mechanically biologically treated (MBT) waste
Author: Fernando, V. I. Sudarshana C. K.
ISNI:       0000 0004 2716 120X
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2011
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Mechanical biological treatment (MBT) is the generic name for a group of processes which have been used to reduce the biodegradable content of municipal solid waste (MSW) in order to aid compliance with the Landfill Directive. As a result of mechanical biological treatment, MSW is converted to a material which has different properties to its parent material, including changes to its mechanical properties. The aims of this research were to identify: • The shear strength characteristics of aerobically treated MBT, processed at New Earth Solutions (NES) in the UK • Changes to the properties of the reinforcing elements due to the MBT process and its impact to the shear strength NES produced two fractions of MBT residue (0-10 mm and 0-20 mm) which were tested using direct shear equipment in order to identify the shear strength characteristic of the MBT residues. It was thought MBT might be a weak material compared to MSW due to the significant reduction of the reinforcing particles size and content, the results confirmed that MBT is a strong material (mobilizes its strength rapidly with displacement) compared to MSW. MBT processes lead to changes in both the content of reinforcing particles and their properties. The reinforcing effect and its impact on the shear strength of MBT waste was tested using direct shear. To an unreinforced basic matrix of either MBT or compost were added reinforcing elements in a controlled way to investigate the impact on shear strength from each identified reinforcement property.
Supervisor: Powrie, William ; Richards, David Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TD Environmental technology. Sanitary engineering