Contact Professor Tom Stephenson
- Tel: 07748 768309
- Email: T.Stephenson@cranfield.ac.uk
- ResearchGate
Background
Current Appointments:
CEO, MEMetic & Visiting Professor, Aston University
Royal Society Entrepreneur in Residence for the School of Science & Technology, City St George's, University of London.
Previous Experience: Pro-Vice-Chancellor (PVC) Research & Innovation, PVC School of Applied Sciences, Cranfield University. Appointed Professor of Water Sciences in 1994. Senior Lecturer in Biochemical Engineering, Teesside University. Post Doctoral Researcher, Civil Engineering Department, Imperial College London. Founded Water Innovate Ltd, a university spinout, sold to Bluewater Bio. Advisor to the Board, Bluewater Bio, 2010-2021. Advisor to Bluemethane Ltd, a net zero startup, 2023-2025.
Qualifications: BSc Biochemistry, University of York, UK. PhD, DIC Civil Engineering, Imperial College London. Fellow of the Royal Academy of Engineering (FREng). CEng, FIChemE, FHEA.
Research opportunities
Biological wastewater treatment processes
Current activities
CEO, MEMetic, Aston University. Fast tracking the development and commercialisation of bio-inspired selective membranes.
Royal Society Entrepreneur in Residence for the School of Science & Technology, City St George's, University of London. Helping staff and students identify opportunities for IP protection, technology licensing and start-ups.
Clients
- Anglian Water
- Bluemethane
- Engineering and Physical Sciences Research Council
- Microvi Biotech Inc
- Ofwat Innovation Fund
- Severn Trent PLC
- Thames Water
- Warden Biomedia
Publications
Articles In Journals
- Colston RE, Nair A, Vale PCJ, Hassard F, Stephenson T, .... (2024). Nutrient removal and recovery from urine using bio-mineral formation processes. ACS Sustainable Resource Management, 1(9)
- Ochs P, Martin B, Germain-Cripps E, Stephenson T, van Loosdrecht M, .... (2022). Techno-economic analysis of sidestream ammonia removal technologies: biological options versus thermal stripping. Environmental Science and Ecotechnology, 13(January)
- Ochs P, Martin BD, Germain E, Wu Z, Lee P-H, .... (2021). Evaluation of a full-scale suspended sludge deammonification technology coupled with an hydrocyclone to treat thermal hydrolysis dewatering liquors. Processes, 9(2)
- Ochs P, Martin BD, Germain E, Stephenson T, van Loosdrecht MCM, .... (2020). Ammonia removal from thermal hydrolysis dewatering liquors via three different deammonification technologies. Science of The Total Environment, 755(Pt 1)
- Simoes F, Colston R, Rosa-Fernandes C, Vale PCJ, Stephenson T, .... (2020). Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals. Environmental Science and Ecotechnology, 3
- Ochs P, Martin BD, Germain E, Stephenson T, van Loosdrecht MCM, .... (2020). Ammonia removal from mixed dewatering liquors by three different deammonification technologies. Environmental Science: Water Research & Technology, 6(12)
- Hassard F, Biddle J, Cartmell E, Coulon F & Stephenson T. (2019). Biosolids recycling impact on biofilm extracellular enzyme activity and performance of hybrid rotating biological reactors. Science of The Total Environment, 706
- Raper E, Stephenson T, Fisher R, Anderson DR & Soares A. (2019). Characterisation of thiocyanate degradation in a mixed culture activated sludge process treating coke wastewater. Bioresource Technology, 288
- Raper E, Fisher R, Anderson DR, Stephenson T & Soares A. (2019). Nitrogen removal from coke making wastewater through a pre-denitrification activated sludge process. Science of The Total Environment, 666
- Dias J, Bellingham M, Hassan J, Barrett M, Stephenson T, .... (2018). Impact of carrier media on oxygen transfer and wastewater hydrodynamics on a moving attached growth system. Chemical Engineering Journal, 351
- Raper E, Stephenson T, Anderson DR, Fisher R & Soares A. (2018). Industrial wastewater treatment through bioaugmentation. Process Safety and Environmental Protection, 118
- Dias J, Bellingham M, Hassan J, Barrett M, Stephenson T, .... (2018). Influence of carrier media physical properties on start-up of moving attached growth systems. Bioresource Technology, 266
- Simoes F, Vale PCJ, Stephenson T & Soares A. (2018). The role of pH on the biological struvite production in digested sludge dewatering liquors. Scientific Reports, 8(1)
- Hassard F, Biddle J, Harnett R & Stephenson T. (2018). Microbial extracellular enzyme activity affects performance in a full-scale modified activated sludge process. Science of The Total Environment, 625
- Raper E, Fisher R, Anderson DR, Stephenson T & Soares A. (2018). Alkalinity and external carbon requirements for denitrification-nitrification of coke wastewater. Environmental Technology, 39(17)
- Raper E, Stephenson T, Simões F, Fisher R, Anderson DR, .... (2018). Enhancing the removal of pollutants from coke wastewater by bioaugmentation: a scoping study. Journal of Chemical Technology & Biotechnology, 93(9)
- Ncube P, Pidou M, Stephenson T, Jefferson B & Jarvis P. (2017). Consequences of pH change on wastewater depth filtration using a multimedia filter. Water Research, 128
- Raper E, Soares A, Chen J, Sutcliffe A, Aries E, .... (2017). Enhancing the removal of hazardous pollutants from coke making wastewater by dosing activated carbon to a pilot‐scale activated sludge process. Journal of Chemical Technology & Biotechnology, 92(9)
- Simoes F, Vale PCJ, Stephenson T & Soares A. (2017). Understanding the growth of the bio-struvite production Brevibacterium antiquum in sludge liquors. Environmental Technology, 39(17)
- Hassard F, Biddle JR, Cartmell E & Stephenson T. (2016). Mesh rotating reactors for biofilm pre-treatment of wastewaters – Influence of media type on microbial activity, viability and performance. Process Safety and Environmental Protection, 103
- Ncube P, Pidou M, Stephenson T, Jefferson B & Jarvis P. (2016). The effect of high hydraulic loading rate on the removal efficiency of a quadruple media filter for tertiary wastewater treatment. Water Research, 107
- Pollard SJT & Stephenson T. (2016). Risk Management for Water and Wastewater Utilities - Second Edition. Water Intelligence Online, 15(0)
- Raper E, Davies S, Perkins B, Lamb H, Hermanson M, .... (2015). Ecological conditions of ponds situated on blast furnace slag deposits located in South Gare Site of Special Scientific Interest (SSSI), Teesside, UK. Environmental Geochemistry and Health, 37(3)
- Stephenson T & Pollard SJT. (2015). Risk Management for Water and Wastewater Utilities. Water Intelligence Online, 7(0)
- Hassard F, Cartmell E, Biddle J & Stephenson T. (2014). Performance of permeable media rotating reactors used for pretreatment of wastewaters. Water Science and Technology, 69(9)
- Hassard F, Biddle JR, Cartmell E, Jefferson B, Tyrrel SF, .... (2014). Rotating biological contactors for wastewater treatment - A review. Process Safety and Environmental Protection, 94(C)
- Wang Y, Zhou S, Ye L, Wang H, Stephenson T, .... (2014). Nitrite survival and nitrous oxide production of denitrifying phosphorus removal sludges in long-term nitrite/nitrate-fed sequencing batch reactors. Water Research, 67
- Petrie B, McAdam EJ, Hassard F, Stephenson T, Lester JN, .... (2014). Diagnostic investigation of steroid estrogen removal by activated sludge at varying solids retention time. Chemosphere, 113
- Soares A, Veesam M, Simoes F, Wood E, Parsons SA, .... (2014). Bio‐
S truvite: A New Route to Recover Phosphorus from Wastewater. CLEAN – Soil, Air, Water, 42(7) - Stephenson T, Reid E, Avery LM & Jefferson B. (2013). Media surface properties and the development of nitrifying biofilms in mixed cultures for wastewater treatment. Process Safety and Environmental Protection, 91(4)
- Martin BD, De Kock L, Stephenson T, Parsons SA & Jefferson B. (2013). The impact of contactor scale on a ferric nanoparticle adsorbent process for the removal of phosphorus from municipal wastewater. Chemical Engineering Journal, 215-216
- Wang Y, Guo G, Wang H, Stephenson T, Guo J, .... (2013). Long-term impact of anaerobic reaction time on the performance and granular characteristics of granular denitrifying biological phosphorus removal systems. Water Research, 47(14)
- Aboobakar A, Cartmell E, Stephenson T, Jones M, Vale P, .... (2013). Nitrous oxide emissions and dissolved oxygen profiling in a full-scale nitrifying activated sludge treatment plant. Water Research, 47(2)
- Dotro G, Jefferson B, Jones M, Vale P, Cartmell E, .... (2012). ChemInform Abstract: Impact and Potential of Intermittent Aeration on Continuous Flow Nitrifying Activated Sludge. ChemInform, 43(25)
- Dotro G, Jefferson B, Jones M, Vale P, Cartmell E, .... (2011). A review of the impact and potential of intermittent aeration on continuous flow nitrifying activated sludge. Environmental Technology, 32(15)
- Ruiz-Marin A, Mendoza-Espinosa LG & Stephenson T. (2010). Growth and nutrient removal in free and immobilized green algae in batch and semi-continuous cultures treating real wastewater. Bioresource Technology, 101(1)
- Santos A, Barton P, Cartmell E, Coulon F, Crane RS, .... (2010). Fate and behaviour of copper and zinc in secondary biological wastewater treatment processes: II Removal at varying sludge age. Environmental Technology, 31(7)
- Crane RS, Barton P, Cartmell E, Coulon F, Hillis P, .... (2010). Fate and behaviour of copper and zinc in secondary biological wastewater treatment processes: I Evaluation of biomass adsorption capacity. Environmental Technology, 31(7)
- Butler MD, Wang YY, Cartmell E & Stephenson T. (2009). Nitrous oxide emissions for early warning of biological nitrification failure in activated sludge. Water Research, 43(5)
- Wang Y, Peng Y & Stephenson T. (2009). Effect of influent nutrient ratios and hydraulic retention time (HRT) on simultaneous phosphorus and nitrogen removal in a two-sludge sequencing batch reactor process. Bioresource Technology, 100(14)
- Winward GP, Avery LM, Stephenson T, Jeffrey P, Le Corre KS, .... (2009). Pathogens in urban wastewaters suitable for reuse. Urban Water Journal, 6(4)
- Pidou M, Parsons SA, Raymond G, Jeffrey P, Stephenson T, .... (2009). Fouling control of a membrane coupled photocatalytic process treating greywater. Water Research, 43(16)
- Jarvis P, Banks J, Molinder R, Stephenson T, Parsons SA, .... (2008). Processes for enhanced NOM removal: beyond Fe and Al coagulation. Water Supply, 8(6)
- Pidou M, Ali F, Williams RF, Jeffrey P, Stephenson T, .... (2008). Technologies for urban water recycling. Water Practice and Technology, 3(2)
- Winward GP, Avery LM, Frazer-Williams R, Pidou M, Jeffrey P, .... (2008). A study of the microbial quality of grey water and an evaluation of treatment technologies for reuse. Ecological Engineering, 32(2)
- Winward GP, Avery LM, Stephenson T & Jefferson B. (2008). ULTRAVIOLET (UV) DISINFECTION OF GREY WATER: PARTICLE SIZE EFFECTS. Environmental Technology, 29(2)
- Pidou M, Avery L, Stephenson T, Jeffrey P, Parsons SA, .... (2008). Chemical solutions for greywater recycling. Chemosphere, 71(1)
- Winward GP, Avery LM, Stephenson T & Jefferson B. (2008). Essential oils for the disinfection of grey water. Water Research, 42(8-9)
- Winward GP, Avery LM, Stephenson T & Jefferson B. (2008). Chlorine disinfection of grey water for reuse: Effect of organics and particles. Water Research, 42(1-2)
- Pidou M, Memon FA, Stephenson T, Jefferson B & Jeffrey P. (2007). Greywater recycling: treatment options and applications. Proceedings of the Institution of Civil Engineers - Engineering Sustainability, 160(3)
- Bungay S, Humphries M & Stephenson T. (2007). Operating strategies for variable‐flow sequencing batch reactors. Water and Environment Journal, 21(1)
- Germain E, Nelles F, Drews A, Pearce P, Kraume M, .... (2007). Biomass effects on oxygen transfer in membrane bioreactors. Water Research, 41(5)
- Callister S & Stephenson T. (2006). Wastewater treatment - Troubled water. CHEMISTRY & INDUSTRY
- Germain E & Stephenson T. (2005). Biomass Characteristics, Aeration and Oxygen Transfer in Membrane Bioreactors: Their Interrelations Explained by a Review of Aerobic Biological Processes. Reviews in Environmental Science and Bio/Technology, 4(4)
- Withey S, Cartmell E, Avery LM & Stephenson T. (2005). Bacteriophages—potential for application in wastewater treatment processes. Science of The Total Environment, 339(1-3)
- Germain E, Stephenson T & Pearce P. (2005). Biomass characteristics and membrane aeration: Toward a better understanding of membrane fouling in submerged membrane bioreactors (MBRs). Biotechnology and Bioengineering, 90(3)
- DiGiano FA, Andreottola G, Adham S, Buckley C, Cornel P, .... (2004). Membrane Bioreactor Technology and Sustainable Water. Water Environment Research, 76(3)
- Stephenson T, Pollard SJT & Cartmell E. (2004). Feasibility of biological aerated filters (bafs) for treating landfill leachate. Environmental Technology, 25(3)
- DiGiano FA, Andreottola G, Adham S, Buckley C, Cornel P, .... (2004). Safe water for everyone. Water Environment and Technology, 16(6)
- Burgess JE, Mayhew ME, Stephenson T & Clark TA. (2002). Assessment of Microbial Populations in Activated Sludge Using an Organism Diversity Index. Water and Environment Journal, 16(1)
- Burgess JE, Colliver BB, Stuetz RM & Stephenson T. (2002). Dinitrogen oxide production by a mixed culture of nitrifying bacteria during ammonia shock loading and aeration failure. Journal of Industrial Microbiology and Biotechnology, 29(6)
- Houghton JI, Burgess JE & Stephenson T. (2002). Off-line particle size analysis of digested sludge. Water Research, 36(18)
- Houghton JI & Stephenson T. (2002). Effect of influent organic content on digested sludge extracellular polymer content and dewaterability. Water Research, 36(14)
- Burgess JE, Mayhew ME, Stephenson T & Clark TA. (2002). Assessment of microbial populations in activated sludge using an organism diversity index. Journal of the Chartered Institution of Water and Environmental Management, 16(1)
- Mendoza-Espinosa LG & Stephenson T. (2001). Organic and Hydraulic Shock Loadings on a Biological Aerated Filter. Environmental Technology, 22(3)
- Moore R, Quarmby J & Stephenson T. (2001). The effects of media size on the performance of biological aerated filters. Water Research, 35(10)
- Jefferson B, Laine A, Parsons S, Stephenson T & Judd S. (2000). Technologies for domestic wastewater recycling. Urban Water, 1(4)
- Colliver BB & Stephenson T. (2000). Production of nitrogen oxide and dinitrogen oxide by autotrophic nitrifiers. Biotechnology Advances, 18(3)
- Burgess JE, Longhurst PJ, Quarmby J & Stephenson T. (2000). Innovational adaptation in the UK water and wastewater industry: a case study of introducing DTA. Technovation, 20(1)
- Burgess JE, Longhurst P, Quarmby J & Stephenson T. (2000). Direct toxicity assessment: adaptation and the proactive roles of regulators and operators. Technovation, 20(6)
- Clark T, Jeffrey P & Stephenson T. (2000). Complex agendas for new technology adoption in the UK water industry. Technovation, 20(5)
- Jeffrey P, Seaton RAF, Parsons SA, Judd SJ, Stephenson T, .... (2000). An interdisciplinary approach to the assessment of water recycling technology options. International Journal of Water, 1(1)
- Houghton JI, Quarmby J & Stephenson T. (2000). The Impact of Digestion on Sludge Dewaterability. Process Safety and Environmental Protection, 78(2)
- Burgess JE, Quarmby J & Stephenson T. (2000). Vitamin addition: an option for sustainable activated sludge process effluent quality. Journal of Industrial Microbiology and Biotechnology, 24(4)
- Clark T, Burgess JE, Stephenson T & Arnold-Smith AK. (2000). The Influence of Iron-Based Co-Precipitants on Activated Sludge Biomass. Process Safety and Environmental Protection, 78(5)
- Houghton JI, Stephenson T & Quarmby J. (2000). The Impact of Digester Retention Time on Microbial Extracellular Polymer Production and Sludge Dewaterability. Environmental Technology, 21(10)
- Lodge BN, Seager T, Stephenson T, English PH & Ford R. (2000). A water recycling plant at the Millennium Dome. Proceedings of the Institution of Civil Engineers - Civil Engineering, 138(5)
- Brindle K, Stephenson T & Semmens MJ. (1999). Pilot‐Plant Treatment of a High‐Strength Brewery Wastewater Using a Membrane‐Aeration Bioreactor. Water Environment Research, 71(6)
- Moore RE, Quarmby J & Stephenson T. (1999). Assessing the potential of foamed clay as a biological aerated filter (BAF) medium. Biotechnology Letters, 21(7)
- MENDOZA-ESPINOSA L & STEPHENSON TOM. (1999). A Review of Biological Aerated Filters (BAFs) for Wastewater Treatment. Environmental Engineering Science, 16(3)
- Jeffrey P, Seaton R, Parsons S, Stephenson T & Jefferson B. (1999). Exploring water recycling options for urban environments: a multi-criteria modelling approach. Urban Water, 1(3)
- Clark T, Stephenson T & Arnold-Smith AK. (1999). The Impact of Aluminium-Based Co-Precipitants on the Activated Sludge Process. Process Safety and Environmental Protection, 77(1)
- Mann AT, Mendoza-Espinosa L & Stephenson T. (1999). Performance of floating and sunken media biological aerated filters under unsteady state conditions. Water Research, 33(4)
- Burgess JE, Quarmby J & Stephenson T. (1999). Role of micronutrients in activated sludge-based biotreatment of industrial effluents. Biotechnology Advances, 17(1)
- Pankhania M, Brindle K & Stephenson T. (1999). Membrane aeration bioreactors for wastewater treatment: completely mixed and plug-flow operation. Chemical Engineering Journal, 73(2)
- Clark T & Stephenson T. (1999). Development of a jar testing protocol for chemical phosphorus removal in activated sludge using statistical experimental design. Water Research, 33(7)
- Burgess JE, Quarmby J & Stephenson T. (1999). Micronutrient Supplements to Enhance Biological Wastewater Treatment of Phosphorus-Limited Industrial Effluent. Process Safety and Environmental Protection, 77(4)
- Moore RE, Quarmby J & Stephenson T. (1999). BAF Media. Process Safety and Environmental Protection, 77(5)
- Burgess JE, Quarmby J & Stephenson T. (1999). Micronutrient supplements for optimisation of the treatment of industrial wastewater using activated sludge. Water Research, 33(18)
- Brindle K & Stephenson T. (1999). Cranfield pioneers membranes. Water and Environment International, 8(61)
- Mendoza-Espinosa LG & Stephenson T. (1998). A process model to evaluate the performance of a biological aerated filter. Biotechnology Techniques, 12(5)
- Brindle K, Stephenson T & Semmens MJ. (1998). Nitrification and oxygen utilisation in a membrane aeration bioreactor. Journal of Membrane Science, 144(1-2)
- Clark T & Stephenson T. (1998). Effects of Chemical Addition on Aerobic Biological Treatment of Municipal Wastewater. Environmental Technology, 19(6)
- Stephenson T. (1998). Processing water - It's chemical engineering. Water Quality International, 1998(1-2)
- Jeffrey P, Seaton RAF, Stephenson T & Parsons S. (1998). Infrastructure configurations for wastewater treatment and reuse: a simulation based study of membrane bioreactors. Water Science and Technology, 38(11)
- Mann A, Mendoza-Espinosa L & Stephenson T. (1998). A comparison of floating and sunken media biological aerated filters for nitrification. Journal of Chemical Technology & Biotechnology, 72(3)
- Jeffrey P, Seaton R, Parsons S & Stephenson T. (1997). Evaluation methods for the design of adaptive water supply systems in urban environments. Water Science and Technology, 35(9)
- Parsons SA, Wang B-L, Judd SJ & Stephenson T. (1997). Magnetic treatment of calcium carbonate scale—effect of pH control. Water Research, 31(2)
- Mayhew M & Stephenson T. (1997). Low Biomass Yield Activated Sludge: A Review. Environmental Technology, 18(9)
- Mann AT & Stephenson T. (1997). Modelling biological aerated filters for wastewater treatment. Water Research, 31(10)
- Clark T, Stephenson T & Pearce PA. (1997). Phosphorus removal by chemical precipitation in a biological aerated filter. Water Research, 31(10)
- Jeffrey P, Seaton R, Parsons S & Stephenson T. (1997). Evaluation methods for the design of adaptive water supply systems in urban environments. Water Science and Technology, 35(9)
- Brindle K & Stephenson T. (1996). Nitrification in a bubbleless oxygen mass transfer membrane bioreactor. Water Science and Technology, 34(9)
- Jones M & Stephenson T. (1996). The Effects of Temperature on Enhanced Biological Phosphate Removal. Environmental Technology, 17(9)
- Mendoza-Espinosa L & Stephenson T. (1996). Grease biodegradation: is bioaugmentation more effective than natural populations for start-up?. Water Science and Technology, 34(5-6)
- Harris SL, Stephenson T & Pearce P. (1996). Aeration investigation of biological aerated filters using off-gas analysis. Water Science and Technology, 34(3-4)
- Matko T, Fawcett N, Sharp A & Stephenson T. (1996). A numerical model of flow in circular sedimentation tanks. Process Safety and Environmental Protection, 74(3)
- Stephenson T. (1996). Waterworks. CHEMICAL ENGINEER-LONDON
- Matko T, Fawcett N, Sharp A & Stephenson T. (1996). Recent Progress in the Numerical Modelling of Wastewater Sedimentation Tanks. Process Safety and Environmental Protection, 74(4)
- Brindle K & Stephenson T. (1996). The application of membrane biological reactors for the treatment of wastewaters. Biotechnology and Bioengineering, 49(6)
- Stephenson T, Judd S & Parsons S. (1996). Scale amelioration ... Reply. CHEMISTRY IN BRITAIN, 32(9)
- Matko T, Fawcett N, Sharp A & Stephenson T. (1996). A numerical model of flow in circular sedimentation tanks. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 74(B3)
- FLETCHER P & STEPHENSON T. (1995). EFFECTS OF PROCESS VARIABLES ON AN ELECTRICALLY-ASSISTED FIBROUS DEPTH FILTER. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 73(B3)
- Baker J, Stephenson T, Dard S & Côté P. (1995). Characterisation of Fouling of Nanofiltration Membranes used to Treat Surface Waters. Environmental Technology, 16(10)
- MANN A, FITZPATRICK CSB & STEPHENSON T. (1995). A COMPARISON OF FLOATING AND SUNKEN MEDIA BIOLOGICAL AERATED FILTERS USING TRACER STUDY TECHNIQUES. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 73(B2)
- Mann A, Fitzpatrick CSB & Stephenson T. (1995). Comparison of floating and sunken media biological aerated filters using tracer study techniques. Process Safety and Environmental Protection: Transactions of the Institution of Chemical Engineers, Part B, 73(2)
- Fletcher P & Stephenson T. (1995). Effects of process variables on an electrically-assisted fibrous depth filter. Process Safety and Environmental Protection: Transactions of the Institution of Chemical Engineers, Part B, 73(3)
- LYNCH M & STEPHENSON T. (1994). Experiences of Digested Sludge Thickening by Aercon. Water and Environment Journal, 8(6)
- Fletcher P, Stephenson T & Judd S. (1994). The use of an applied electric field for the filtration of particles from a low conductivity aqueous suspension. Chemical Engineering Science, 49(14)
- Pankhania M, Stephenson T & Semmens MJ. (1994). Hollow fibre bioreactor for wastewater treatment using bubbleless membrane aeration. Water Research, 28(10)
- Correia VM, Stephenson T & Judd SJ. (1994). Characterisation of textile wastewaters ‐ a review. Environmental Technology, 15(10)
- STEPHENSON T. (1994). LANDFILL LEVY. CHEMISTRY & INDUSTRY
- Stephenson T, Mann A & Upton J. (1993). The small footprint wastewater treatment process. Chemistry and Industry (London)
- STEPHENSON T. (1993). JOIN THE CLUB. CHEMICAL ENGINEER-LONDON
- Stephenson D & Stephenson T. (1992). Bioaugmentation for enhancing biological wastewater treatment. Biotechnology Advances, 10(4)
- STEPHENSON T. (1992). ENVIRONMENTAL BIOTECHNOLOGY GROUP MEETING BIOTECHNOLOGY IN THE CLEAN WATER INDUSTRIES - INTRODUCTION. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 54(2)
- Davies CAL, Tomlinson K & Stephenson T. (1991). Heavy metals in river tees estuary sediments. Environmental Technology, 12(11)
- STEPHENSON T. (1991). CHARLOTTE AND WATER. CHEMICAL ENGINEER-LONDON
- STEPHENSON T. (1991). BLUE-GREEN-ALGAL BLOOMS. CHEMISTRY IN BRITAIN, 27(2)
- Stephenson T. (1990). Substrate inhibition of phenol oxidation by a strain ofCandida tropicalis. Biotechnology Letters, 12(11)
- Gerrard AM & Stephenson T. (1990). Some economic targets for inoculum enhanced activated sludge processes. Process Safety and Environmental Protection: Transactions of the Institution of Chemical Engineers, Part B, 68(4)
- GERRARD AM & STEPHENSON T. (1990). SOME ECONOMIC TARGETS FOR INOCULUM ENHANCED ACTIVATED-SLUDGE PROCESSES. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 68(B4)
- Hunter M, Stephenson T, Perry R & Lester JN. (1989). The behaviour of nitrilotriacetic acid during upflow sludge blanket clarification. Environmental Technology Letters, 10(12)
- Yeoman S, Stephenson T, Lester JN & Perry R. (1988). The removal of phosphorus during wastewater treatment: A review. Environmental Pollution, 49(3)
- Yeoman S, Hunter M, Stephenson T, Lester JN & Perry R. (1988). An assessment of excess biological phosphorus removal during activated sludge treatment. Environmental Technology Letters, 9(7)
- MATCHETT AJ & STEPHENSON T. (1988). CHEMICAL-ENGINEERS. NEW SCIENTIST, 118(1610)
- Stephenson T & Lester JN. (1987). Heavy metal behaviour during the activated sludge process I. Extent of soluble and insoluble metal removal. Science of The Total Environment, 63(C)
- Stephenson T & Lester JN. (1987). Heavy metal behaviour during the activated sludge process II. Insoluble metal removal mechanisms. Science of The Total Environment, 63(C)
- Stephenson T, Lawson PS, Rudd T, Sterritt RM & Lester JN. (1987). Mechanism of Metal Removal in Activated Sludge. Journal of Environmental Engineering, 113(5)
- Stephenson T, Lester JN & Perry R. (1987). Nitrilotriacetic acid removal in septic tanks: A field study. Water, Air, and Soil Pollution, 33(3-4)
- HUNTER M, STEPHENSON T & LESTER JN. (1987). The Fate of Heavy Metals in Pilot‐Plant Scale Upflow Sludge‐Blanket Clarifiers. Water and Environment Journal, 1(1)
- Yeoman S, Stephenson T, Lester JN & Perry R. (1986). Biotechnology for phosphorus removal during wastewater treatment. Biotechnology Advances, 4(1)
- Hunter M, Stephenson T, Kirk PW, Perry R & Lester JN. (1986). Effect of salinity gradients and heterotrophic microbial activity on biodegradation of nitrilotriacetic acid in laboratory simulations of the estuarine environment. Applied and Environmental Microbiology, 51(5)
- Stephenson T & Lester JN. (1986). Evaluation of startup and operation of four anaerobic processes treating a synthetic meat waste. Biotechnology and Bioengineering, 28(3)
- Hunter M, Stephenson T, Lester JN & Perry R. (1985). Removal of low concentrations of nitrilotriacetic acid in the activated sludge process. Chemosphere, 14(3-4)
- Stephenson T, Perry R & Lester JN. (1985). The influence of transient phenomena on the biodegradation of nitrilotriacetic acid in the activated sludge process II. Variations in influent metal and NTA concentrations. Water, Air, and Soil Pollution, 25(4)
- Hunter M, Stephenson T, Lester JN & Perry R. (1985). The influence of transient phenomena on the biodegradation of nitrilotriacetic acid in the activated sludge process I: Variations in hydraulic loading and sewage strength. Water, Air, and Soil Pollution, 25(4)
- Stephenson T, Lester JN & Perry R. (1984). Acclimatisation to nitrilotriacetic and in the activated sludge process. Chemosphere, 13(9)
- Perry R, Kirk PWW, Stephenson T & Lester JN. (1984). Environmental aspects of the use of NTA as a detergent builder. Water Research, 18(3)
- Stephenson T, Lester JN & Perry R. (1983). The influence of transient temperature changes on the biodegradation of nitrilotriacetic acid in the activated sludge Process: A pilot plant study. Environmental Pollution Series A, Ecological and Biological, 32(1)
- Stephenson T, Perry R & Lester JN. (1983). The behaviour of nitrilotriacetic acid during the anaerobic digestion of co-settled sewage sludge. Water Research, 17(10)
- Stephenson T, Lester JN & Perry R. (1983). Adsorption of nitrilotriacetic acid by mixed liquor suspended solids and its effect on heavy metal solubility in the activated sludge process. Chemosphere, 12(9-10)
- Stephenson T. Principles of Water and Wastewater Treatment Processes. Water Intelligence Online, 8
