Browsing by Author "Brown, Gareth"

Now showing 1 - 12 of 12
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    Data subset for Chapter 3: Particle degradation data
    (Cranfield University, 2022-12-13 12:34) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    The particle degradation dataset for all conditions which represent data supporting 'Impact of low tmperatures on anerobic hydrolysis in passive treatment systems such as septic tanks'.
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    Data subset for Chapter 3: Particle sizing data
    (Cranfield University, 2022-12-13 12:33) Brown, Gareth; Jefferson, Bruce; Dotro, Gabriela; MacAdam, Jitka
    The particle sizing dataset as underlying the data presenting in the study 'Impact of low temperatures on anaerobic hydrolysis in passive treatment systems such as septic tanks' measured on a Malvern mastersizer, for the batch tests run a 5, 15 37 degrees celcuis and a sample prior to digestion.
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    Data Supporting Chapter 3: Extracellular Enzyme Activity
    (Cranfield University, 2022-12-13 12:34) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka; Dotro, Gabriela
    The raw and processed data of thhe extracellular lipase activity supporting the study 'Impact of low temperatures on anaerobic hydrolysis in passive treatment systems such as septic tanks'
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    Data Supporting: A whole life cost and carbon perspective of alternatives to septic tanks utilising nature based solutions
    (Cranfield University, 2022-12-13 12:33) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka; Dotro, Gabriela
    The data summary alongside the costing calculation and lifecycle inventory for the study 'A whole life cost and carbon perspective of alternatives to septic tanks utilising nature based solutions'
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    Data Supporting: Constructed Wetlands for the Polishing of Enhanced Septic Tank Effluent: An Operational Case Study
    (Cranfield University, 2022-12-16 14:14) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Operational data of the constructed wetlands and grant test of media
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    Data Supporting: Onsite Anaerobic Reactor Design and Complexity, the Impact on Treatment and Hydrolysis in Temperate Conditions: A Systematic Review
    (Cranfield University, 2022-12-16 14:23) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Data supporting Onsite Anaerobic Reactor Design and Complexity, the Impact on Treatment and Hydrolysis in Temperate Conditions: A Systematic Review. Consisting of the data extracted from literature studies and the studies from the systematic review.
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    ItemOpen Access
    Developing the next generation of treatment flowsheets for rural wastewater
    (Cranfield University, 2022-12) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka; Dotro, Gabriela
    Septic tank systems (STS) are one of the most common wastewater treatment systems in the world however these systems are becoming antiquated, struggling to meet tighter consent, needing frequent desludging and venting greenhouse gases to the environment. A flowsheet to tackle these issues was proposed consisting of an enhanced septic tank (EST) and a constructed wetland (CW). The proposed flowsheet was assessed by examining the underlying mechanisms, testing the flowsheet at pilot scale and assessing the cost and carbon implications of the flowsheet. A key aim of the thesis is to decrease the maintenance of the flowsheet to once every 5 to 7 years. The maintenance of septic tank is due to desludging, as the tank needs to be emptied when the sludge bed reaches a certain height. The desludging of a septic tank is dependent on the hydrolysis rate within the reactor. Batch studies into anaerobic digestion found that low operating temperatures in septic tanks impact the hydrolysis rate. However, temperature is not the dominant factor of hydrolysis and optimisation of mass transfer between hydrolytic microorganisms and degradable particulates can increase the hydrolysis rate by 200%. A pilot scale study investigated using baffles to promote hydraulic mixing within a septic tank. The presence of hydraulic mixing due to the baffles increased the hydrolysis rate constant of a septic tank from 0.0089 d⁻¹ to 0.035d⁻¹, extending the time between desludging from 4.9 to 6.7 years. The proposed flowsheet is a lower cost treatment system than a conventional package treatment system (e.g. submerged aerated filter) over a 30 year life time and leads to a significant reduction in lifetime carbon emissions compared to a STS. The cost and carbon reduction of the flowsheet make the flowsheet a viable abatement technique.
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    EST_CFD_outputs.csv
    (Cranfield University, 2022-10-28 15:49) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Outputs of CFD model of EST systems for dead space, HRT and Peclet number
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    EST_HydrolysisCalculation
    (Cranfield University, 2022-10-28 15:47) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Calculation of kh from sludge data
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    ItemOpen Access
    EST_HydrolysisRate_versus_Desludge.csv
    (Cranfield University, 2022-10-28 15:43) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Data outputs from matlab mass balance model for calculation of hydrolysis rate constant against desludging frequency
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    EST_OperationalData.csv
    (Cranfield University, 2022-10-28 15:45) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Operational data of pilot plants
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    EST_SludgeData.csv
    (Cranfield University, 2022-10-28 15:46) Brown, Gareth; Jefferson, Bruce; MacAdam, Jitka
    Dataset for the sludge within EST study pilot systems