A5000048727- Anaerobic Digestion and Biogas Production
- Phosphorus and nutrient management
- Carbon Dioxide Capture Technologies
- Wastewater Treatment and Reuse
- Wastewater Treatment and Nitrogen Removal
- Membrane Separation Technologies
- Fecal contamination and water quality
- CO2 Sequestration and Geologic Interactions
- Constructed Wetlands for Wastewater Treatment
- Membrane-based Ion Separation Techniques
- Agriculture Sustainability and Environmental Impact
- Water Quality Monitoring and Analysis
- Microbial Community Ecology and Physiology
- Odor and Emission Control Technologies
- SARS-CoV-2 detection and testing
- Clinical Nutrition and Gastroenterology
- Water-Energy-Food Nexus Studies
- Atmospheric and Environmental Gas Dynamics
- Coagulation and Flocculation Studies
- Biofuel production and bioconversion
- Flood Risk Assessment and Management
- Solar-Powered Water Purification Methods
- Air Quality Monitoring and Forecasting
- Municipal Solid Waste Management
- Gut microbiota and health
Cranfield University
2016-2025
University of South Africa
2022-2023
Severn Trent (United Kingdom)
2019
Coventry (United Kingdom)
2019
Abstract Anaerobic digestion of organic waste into methane and carbon dioxide (biogas) is carried out by complex microbial communities. Here, we use full-length 16S rRNA gene sequencing 285 full-scale anaerobic digesters (ADs) to expand our knowledge about diversity function the bacteria archaea in ADs worldwide. The sequences are processed amplicon sequence variants (FL-ASVs) used MiDAS 4 database for wastewater treatment systems, creating 5. expansion increases coverage worldwide, leading...
Inhibitory pathways in dry anaerobic digestion are still understudied and current knowledge on wet processes cannot be easily transferred. This study forced instability pilot-scale digesters by operating at short retention times (40 33 days) order to understand inhibition over long term operation (145 days). The first sign of elevated total ammonia concentrations (8 g/l) was a headspace hydrogen level the thermodynamic limit for propionic degradation, causing accumulation. combined...
Abstract Anaerobic digestion represents a key biotechnology for the transformation of organic waste into renewable energy (biogas) and relies on complex microbial communities that work in concert to degrade substrates methane carbon dioxide. Here, we sequenced more than half million high-quality, full-length 16S rRNA gene sequences from 285 full-scale anaerobic digesters (ADs) across world expand our knowledge about diversity function bacteria archaea ADs. The were processed amplicon...
The increasing concentration of carbon dioxide (CO2) in the atmosphere and stringent greenhouse gases (GHG) reduction targets, require development CO2 sequestration technologies applicable for waste wastewater sector. This study addressed emissions enhancement biogas production associated with enrichment anaerobic digesters (ADs). benefits were examined by injecting at 0, 0.3, 0.6 0.9 M fractions into batch ADs treating food or sewage sludge. Daily specific methane (CH4) increased 11-16%...
An estimated 15 million people in the UK menstruate over span of approximately 37.5 years, using every year around 3.3 billion units single-use menstrual management products (MMPs) (i.e. pads and tampons). A more circular design sustainable these could greatly reduce their waste environmental impacts. This research is an exploratory study into current products, systems UK. The found that 28,114 tonnes generated annually from 26,903 disposable which about 4% (3,363 tonnes) lost environment by...
Thermal hydrolysis process (THP) and biological (BH) are key pre-treatment technologies for anaerobic digestion (AD), termed advanced digesters (AADs). They target the rate-limiting step in AD. This study evaluates full-scale pre-treatments macromolecule bias implementation of enzymes to enhance biogas yield. Findings show THP significantly improves protein carbohydrate solubilisation by 30% 25%, respectively, but fully hydrolyses only carbohydrates. In contrast, BH targets fibres proteins,...
With the increase in urbanisation and climate change around globe, there is an increased risk of surface water flooding. Although extreme flood events are commonly discussed, smaller, more frequent also cause significant disruptions that impact human life put financial stress on authorities. The majority urban flooding due to drainage failure. For effective management, it important assess effectiveness existing assets accordingly plan asset maintenance or retrofitting new (both traditional...
In this study, three tertiary solid separation technologies were assessed on their robustness and resilience against an effluent phosphorus target of <0.3 mg P/L at steady state dynamic conditions. The ballasted flocculation system was found to be very robust delivering the low P target. Alternatively, cloth filtration provided a more sustainable option for less strict consents sub 0.5 P/L. from membrane variable but it shown meet even with increased solids content in feed. A molar ratio...
This study provides detailed characterisation of nucleation kinetics, induction time and supersaturation to understand scaling crystal growth in membrane distillation crystallisation. Membrane area was used moderate rate, as a method transition across the metastable zone without modifying boundary layer conditions. Increasing sustained same water vapour flux but increased rate within crystallising solution (sodium chloride). reduced level at induction. minimised by increasing despite an...
The increase of studies relaying on gas to liquid mass transfer in digested sludge (shear thinning fluid) necessitates a better understanding the impact apparent viscosity (μa) and rheology process performance. Mass retardation due μa variations was investigated pilot scale absorption bubble column for Newtonian shear fluids with varied superficial velocities (UG). A non-linear reduction efficiency increasing observed, being higher at low ranges high UG. An 114 cPo μ from 1.01 115 glycerol...
Carbon dioxide (CO2) enrichment of anaerobic digesters (AD) was previously identified as a potential on-site carbon revalorisation strategy. This study addresses the lack studies investigating this concept in up-scaled units and need to understand mechanisms exogenous CO2 utilisation. Two pilot-scale ADs treating food waste were monitored for 225 days, with test unit being periodically injected using bubble column. The AD maintained CH4 production rate 0.56 ± 0.13 m3 CH4·(kg VSfed d)−1...
While water vapour flux is often regarded as the critical parameter in membrane distillation crystallisation (MDC), there are multiple factors that will determine kinetics of nucleation and crystal growth. A Nývlt-like equation therefore introduced can relate how conditional parameters (membrane area, flux, temperature difference, crystalliser volume, magma density) independently modify rate supersaturation, enabling a normalising approach for characterisation growth within MDC. Each be...
Anaerobic digestion (AD) of sewage sludge can be optimised by adding trade wastes (TWs) because their nutrient content and boost in biogas formation if non-inhibitory. However, some components TWs might have an inhibitory impact, such as nitrogen compounds, sulphate, heavy metals, metalloids, halogens organic pollutants (e.g., phenol). This study aimed to understand the impact on co-digestion with identify appropriate TW loads for sustainable AD operation. The composition 160 was evaluated...
ABSTRACT Reactive media present an alternative to gravel in constructed wetlands and have the potential sustainably efficiently remove phosphorus from wastewater. In this study, a full-scale steel slag wetland has been operated for its whole lifecycle at which 1.39 mg P/g were retained. During lifecycle, met strict consents below 0.5 P/L first 6 months was 266 353 days before effluent concentration rose above typical of 1 2 P/L, respectively. A detailed analysis system demonstrated that...
Carbon dioxide (CO2) enrichment of anaerobic digesters (ADs) without hydrogen addition has been demonstrated to provide a potential solution manage CO2 streams generated in the water and organic waste sectors, with concomitant increases methane (CH4) production. This study investigates utilization mechanisms, by considering chemical biological pathways food sewage sludge ADs. Methanosaetaceae was observed be dominant methanogen ADs (Abundance 83.8-98.8%) but scarce units (3.5-5.8%)....
With the increasing trend in global average temperature, UK’s water industry has committed to achieve Net Zero by 2030 and part of this includes cutting CH4 emissions from sludge treatment facilities. Currently, are estimated following carbon accounting workbook guidelines using default emission factors. However, method might not be a true representation as these vary depending on many The use unmanned aerial vehicles (UAVs) proved cost effective for environmental monitoring tasks requiring...
With the increase in rainfall intensity, population, and urbanised areas, surface water flooding (SWF) is an increasing concern impacting properties, businesses, human lives. Previous studies have shown that microtopography significantly influences flow paths, direction, velocity, flood extent depth, particularly for shallow associated with urban SWF. This study compares two survey strategies commonly used by practitioners, S1 (using Unmanned Aerial Systems-based RGB data) S2 manned aircraft...