Browsing by Author "Stephenson, Tom"

Browsing by Author "Stephenson, Tom"

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  • Off-line particle size analysis of digested sludge. 
    Houghton, Jennifer I.; Stephenson, Tom (Elsevier Science B.V., Amsterdam., 2002-11-01)
    Particle size analysis was carried out on six samples of digested sludge using laser diffraction. The digested sludge was produced in laboratory-scale reactors under different feed regimes based on a mixture of primary ...
  • Operating strategies for variable-flow sequencing batch reactors. 
    Bungay, S.; Humphries, M.; Stephenson, Tom (Blackwell Publishing, 2007-03)
    Sequencing batch reactors (SBRs) are variable-volume, non-steady-state, suspended-growth biological wastewater treatment reactors. The treatment process is characterised by a repeated treatment cycle consisting of a series ...
  • Organic and hydraulic shock loadings on a Biological Aerated Filter 
    Mendoza-Espinosa, L. G.; Stephenson, Tom (Selper Ltd., 2001-03-01)
    The performance of a biological aerated filter (BAF) during short-term (60 min) organic and hydraulic shock loads was investigated. The BAF used for the present experiment was not capable of absorbing high peak organic ...
  • Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals 
    Simoes, Francisco; Colston, Robert; Rosa-Fernandes, Catarina; Vale, Peter; Stephenson, Tom; Soares, Ana (Elsevier, 2020-06-27)
    Phosphorus and nutrient recovery from wastewater as mineral salts can support local replenishment of fertilisers and reduce mining, contributing to the circular economy. Wastewater and related streams are rich in nutrients, ...
  • Recycling of carbon fibre composite material 
    Lloyd, Rachel Louise (Cranfield University, 2002-02)
    Different routes for recycling carbon fibre composites from the aircraft industry were investigated for feasibility., Literature analysis revealed little previous ·work in this area, with most composite recycling ...
  • The role of environmental effects and Acinetobacter spp in enhanced biological phosphate removal 
    Jones, M (1996-02)
    One aim of this work was to define the role of Ac/nefojbacfer spp. in enhanced biological phosphate removal (EBPR). A culture enrichment and selective medium technique was developed to isolate Acinetobacter spp. from ...
  • The role of pH on the biological struvite production in digested sludge dewatering liquors 
    Simoes, Francisco; Vale, Peter; Stephenson, Tom; Soares, Ana (Nature Publishing Group, 2018-05-08)
    Struvite production mediated by bacteria has opened up a new route for phosphorus recovery from wastewater streams but its application to digested sludge dewatering liquors is not yet well understood. This study investigates ...
  • Rotating biological contactors for wastewater treatment - A review 
    Hassard, Francis; Biddle, Jeremy R.; Cartmell, Elise; Jefferson, Bruce; Tyrrel, Sean F.; Stephenson, Tom (Elsevier, 2014-08-04)
    Rotating biological contactors (RBCs) for wastewater treatment began in the 1970s. Removal of organic matter has been targeted within organic loading rates of up to 120 g m−2 d−1 with an optimum at around 15 g m−2 d−1 for ...
  • Techno-economic analysis of sidestream ammonia removal technologies: biological options versus thermal stripping 
    Ochs, Pascal; Martin, Ben; Germain-Cripps, Eve; Stephenson, Tom; van Loosdrecht, Mark; Soares, Ana (Elsevier, 2022-11-22)
    Over the past twenty years, various commercial technologies have been deployed to remove ammonia (NH4–N) from anaerobic digestion (AD) liquors. In recent years many anaerobic digesters have been upgraded to include a ...
  • Temperatures in high efficiency deep grinding 
    Bell, Andrew John (Cranfield University, 2009-02)
    This research considers the temperatures generated in the workpiece during profile and cylindrical traverse grinding in the High Efficiency Deep Grinding (HEDG) regime. The HEDG regime takes large depths of cut at high ...
  • Two-Phase Flow in Circular Secondary Sedimentation Tanks 
    Matko, T. I. R. (Cranfield University, 1997-12)
    The main objective of this work was to optimise a numerical model to predict the flow in circular secondary sedimentation tanks. The numerical models in the literature were reviewed and the new opportunities for research ...
  • Understanding the growth of the bio-struvite production Brevibacterium antiquum in sludge liquors 
    Simoes, Francisco; Vale, Peter; Stephenson, Tom; Soares, Ana (Taylor & Francis, 2017-12-21)
    Biological struvite (bio-struvite) production through biomineralization has been suggested as an alternative to chemically derived struvite production to recover phosphorus from wastewater streams. In this study, statistical ...
  • Upflow and downflow biological aerated filters (BAFs) for wastewater treatment 
    Mendoza-Espinosa, Leopoldo Guillermo (1999-03)
    Investigations on two small pilot-scale biological aerated filters operating in upflow and downflow mode using identical media were undertaken in order to compare their performance for the removal of carbonaceous matter ...