Browsing by Author "Stephenson, Tom"

Design and evaluation pf a small package sewage treatment system

Daude, D. (Cranfield University, 2003-06)

The aim was to develop and subsequently evaluate a small package sewage treatment system that combined the commercial demands of the market with current and future environmental legislation in the UK. Questionnaires sent ...

Development of a novel lightweight media for Biological Aerated Filters (BAFS)

Moore, R.; Quarmby, Joanne; Stephenson, Tom (School of Water Sciences, Cranfield University, 1999-03-03)

Clay has been foamed and extruded using novel technology, to produce a lightweight media called StarLight C. Altering the production process parameters allows control of the media diameter, density, strength, and surface ...

Development of a Novel Medium to Improve the Performance of Biological Aerated Filters (BAFs)

Moore, Rebecca Ellen (1999-10)

A foamed clay, StarLight C, was selected as a potential BAF medium after qualifying as a filter medium according to the BEWA standard tests, and showing the propensity to collect a biofilm. At loading rates > 10 kg COD/ ...

Development of a recitculating plastic media Biological Aerated Filter (REBAF)

Stephenson, Tom (School of Water Sciences, Cranfield University, 1996-06-12)

True biological aerated filters (BAFs) combine two unit operations in one reactor: aerobic biological treatment and subsequent biomass separation from the effluent (Stephenson et al., 1993). The submerged media used as ...

Dinitrogen oxide production by a mixed culture of nitrifying bacteria during ammonia shock loading and aeration failure

Burgess, Joanna E.; Colliver, Bettina B.; Stuetz, Richard M.; Stephenson, Tom (Springer, 2002-12-01)

A number of experiments was conducted in order to establish if N2O in the exhaust gas from an aerobic consortium of nitrifiers could be used as an indicator for monitoring the nitrification process. Laboratory-scale ...

Disinfection of grey water

Winward, Gideon Paul (Cranfield University, 2007-10)

The reuse of grey water, for applications such as toilet flushing and irrigation, represents a potential sustainable solution to water shortages experienced by regions worldwide. Although reused grey water is not intended ...

The effect of high hydraulic loading rate on the removal efficiency of a quadruple media filter for tertiary wastewater treatment

Ncube, Philani; Pidou, Marc; Stephenson, Tom; Jefferson, Bruce; Jarvis, Peter (IWA Publishing, 2016-10-24)

It is well known that filtration removal efficiency falls with an increase in flow rate; however, there is limited supporting experimental data on how removal efficiency changes for filters with multiple layers of media ...

Effect of influent nutrient ratios and hydraulic retention time (HRT) on simultaneous phosphorus and nitrogen removal in a two-sludge sequencing batch reactor process

Wang, Yayi; Peng, Yongzhen; Stephenson, Tom (Elsevier Science B.V., Amsterdam., 2009-07-01)

A laboratory-scale anaerobic–anoxic/nitrification sequencing batch reactor (A2N- SBR) fed with domestic wastewater was operated to examine the effect of varying ratios of influent COD/P, COD/TN and TN/P on the nutrient ...

Effect of influent organic content on digested sludge extracellular polymer content and dewaterability

Houghton, Jennifer I.; Stephenson, Tom (Elsevier, 2002-08)

The organic composition of the feed sludge to six laboratory-scale anaerobic digesters was adjusted by substituting a proportion of the primary sludge for glucose or propionic acid solution. Substitution with glucose caused ...

Effects of configuration on the operation of membranes in membrane biological reactors

Winkler, Gudrun (Cranfield University, 2011-01)

The aim of this work included the investigation of the impact of membrane material properties on fouling propensity and permeate flux decline in MBR biomass systems. Furthermore, the impact of membrane configuration on ...

The effects of media size on the performance of biological aerated filters

Moore, Rebecca; Quarmby, Joanne; Stephenson, Tom (Elsevier, 2001-07)

Biological aerated filters (BAFs) are an attractive process option, particularly when low land usage is required. They can combine BOD, solids and ammoniacal nitrogen removal and can be utilised at both secondary and ...

Effects of shear and mixing on a continuously-fed stirred tank reactor for aerobic, biological wastewater treatment

Berry, Alice L. (Cranfield University, 2002-10)

Treatment of domestic wastewater in a 9 L well defined conventional biotechnology type reactor was investigated over a range of stirrer speeds (8.3 to 16.7 s-1) and retention times (8 to 12 h). Parameters of reactor ...

Enhanced biological treatment of spent metalworking fluids by prior removal of a polymer

Connolly, Helen E.; van der Gast, Christopher J.; Wylie, Doug; Stephenson, Tom; Thompson, Ian P. (John Wiley & Sons, Ltd, 2006-09-01)

The biological treatment of spent synthetic metalworking fluid (MWF) has been investigated in many studies, with most reporting the presence of undegraded components in the residual waste. In this study a hybrid approach ...

Enhancing the removal of hazardous pollutants from coke making wastewater by dosing activated carbon to a pilot‐scale activated sludge process

Raper, Eleanor; Soares, Ana; Chen, J.; Sutcliffe, A.; Aries, E.; Anderson, D.; Stephenson, Tom (Wiley: 12 months, 2017-02-09)

Powdered activated carbon (PAC) was investigated for its ability to remove 6 polycyclic aromatic hydrocarbons (Σ6PAHs) (fluoranthene, benzo[b + J]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3-cd]pyrene, ...

Enhancing the removal of pollutants from coke wastewater by bioaugmentation: a scoping study

Raper, Eleanor; Stephenson, Tom; Simões, Francisco; Fisher, Raymond; Anderson, David R.; Soares, Ana (2018-02-09)

BACKGROUND Bioaugmentation and biostimulation were investigated for their ability to improve the removal of thiocyanate (SCN-), polycyclic aromatic hydrocarbons (PAHs), phenol and trace metals in coke wastewater. ...

Evaluation of a full-scale suspended sludge deammonification technology coupled with an hydrocyclone to treat thermal hydrolysis dewatering liquors

Ochs, Pascal; Martin, Benjamin D.; Germain, Eve; Wu, Zhuoying; Lee, Po-Heng; Stephenson, Tom; van Loosdrecht, Mark C. M.; Soares, Ana (MDPI, 2021-02-01)

Suspended sludge deammonification technologies are frequently applied for sidestream ammonia removal from dewatering liquors resulting from a thermal hydrolysis anaerobic digestion (THP/AD) process. This study aimed at ...

Feasibility of biological aerated filters (BAFs) for treating landfill leachate.

Stephenson, Tom; Pollard, Simon J. T.; Cartmell, Elise (Taylor & Francis, 2004-03-01)

Ammonia can be removed from landfill leachate through aerobic biological processes. The biological aerated filter (BAF) combines biological treatment and subsequent biomass separation in one reactor providing a small ...

Feasibility of biological aerated filters (BAFs) for treating landfill leachate

Stephenson, Tom; Pollard, Simon J. T.; Cartmell, Elise (2004-12-31)

Ammonia can be removed from landfill leachate through aerobic biological processes. The biological aerated filter (BAF) combines biological treatment and subsequent biomass separation in one reactor providing a small ...

Fouling control of a membrane coupled photocatalytic process treating greywater

Pidou, Marc; Parsons, Simon A.; Raymond, Gaelle; Jeffrey, Paul; Stephenson, Tom; Jefferson, Bruce (Elsevier Science B.V., Amsterdam., 2009-09-01)

Fouling in membrane coupled photocatalytic reactors was investigated in the case of greywater treatment by establishing the link between product type, dose, irradiation time and fouling rates in a cross flow membrane ...

Greywater recycling: A review of treatment options and applications

Pidou, Marc; Memon, Fayyaz Ali; Stephenson, Tom; Jefferson, Bruce; Jeffrey, Paul (Thomas Telford, 2007-01-01)

Wastewater is an immense resource which could have significant applications in regions of water scarcity. Greywater has particular advantages in that it is a large source with a low organic content. Through critical analysis ...

Browsing by Author "Stephenson, Tom"

Browsing by Author "Stephenson, Tom"

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