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Showing 1 to 20 of 38 for “"Biofilter"”.
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Aquaponic biofilter system using heliconia sp. for ammonia removal in lake
… impact on water quality. Consequently, biofilter aquaponic system for ammoniacal nitrogen removal in lake near non-point sources such as oil palm plantation, factory and educational building were studied. Aquaponic is a system that mutually integrates aquaculture and plant cultivation. …
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Development and application of a microbial reliability model to analyze denitrifying biofilter stability
… method is the use of edge-of-field denitrifying biofilters. These biofilters redirect tile drainage flow through a woodchip bed, where microbial activity converts influent nitrate to nitrogen gases. As with many engineered ecosystems, performance stability of the biofilters is of concern. While …
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Hydraulic Characteristics and Nutrient Degradation Kinetics of a Horizontally Orientated Subsurface Flow Biofilter
… such as horizontally orientated subsurface flow biofilters are a potential suitable remediation measure, as they are cost-effective, scalable and easy to maintain. However, the variable nutrient levels in surface waters affected by informal settlements pose a challenge to achieving consistent …
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A Comparative Analysis of Three Biofilter Types Treating Wastewater Produced in Recirculating Aquaculture Systems
… at a density of approximately 455 fish m³. Biofilter types were the only factor differing among system designs and were an upflow pulsed bed bead filter, packed tower trickling filter and a rotating biological contactor (RBC). After stocking, systems were allowed to acclimate using ammonia …
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Denitrification of Recirculating Aquaculture System Waters Using an Upflow Biofilter and a Fermented Substrate
The ability of an upflow, denitrifying biofilter using a fermentation generated carbon source to treat the high nitrate concentrations typically seen in recirculating aquaculture systems was studied using a synthetic nitrate wastewater supplied at two nitrate loadings, 1.13 and 2.52 kg …
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Diversity of methane and short chain hydrocarbon degrading bacteria with an emphasis on methane biofilter systems
… in protocol design for monitoring methane biofilter systems, and the analyses of single cell genomes containing new CuMMO-encoding genes. CuMMOs are encoded by three genes, usually in an operon of xmoCAB, and oxidize ammonia, methane, and short chain alkanes and alkenes. To examine the …
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Impedance-based moisture content sensor assessment for gas-phase biofilters
A woodchips-based gas-phase biofilter is capable of mitigating airborne ammonia efficiently. The moisture content (MC) of the biofilter media is important to determine ammonia mitigation and nitrous oxide generation. It is critical to monitor real-time moisture content of the biofilter media for …
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Microbial community analysis for denitrifying biofilters
Denitrifying biofilters are a promising and low-maintenance technology for removing nitrate from agricultural drainage, capable of removing 50-80% of annual nitrate loads. Because increased riverine nitrate concentrations are correlated with indicators of eutrophy and degradation of coastal waters, …
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Microbial community dynamics in denitrifying biofilters receiving agricultural drainage
… entering surface waters is the denitrifying biofilter. A typical denitrifying biofilter consists of a woodchip-filled trench inline with the drainage tile; woodchips provide a carbon substrate to the microorganisms that convert nitrate to nitrogen gas through the denitrification pathway. …
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The performance of a field scale biofiltration cells in reducing nutrient rich surface runoff from an informal settlement in South Africa
… treatment, firstly by utilising field scale biofilter cells to mitigate the impact of elevated nutrient concentrations from an informally settled catchment; and secondly, to recover, and assess the risk of reusing treated water for irrigation of food gardens in a food insecure and water …
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Gas-phase biofiltration for livestock building ammonia emission mitigation
… certain livestock building ammonia emissions. Biofilters are bio-reactors that can absorb ammonia and then oxidize it into nitrite and nitrate using microorganisms. Woodchips and composts are often used as packing materials thus making it an affordable method. It was originally developed in …
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Factors Influencing the Nitrification Efficiency of Fluidized Bed Filters With a Plastic Bead Medium
… rates and ammonia levels. Bead settled depth and biofilter diameter (12.7, 15.2 and 17.8 cm) were the factors differing among the filters. The experiments were conducted with three replicate recirculating systems. Each system included one of the three different biofilter types, connected in …
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Investigating upflow biofiltration using the Biostyr process by varying the organic strength of the influent
The performance of Biostyr media using an upflow biofilter scheme was investigated. Three separate Modes that varied the organic strength of the influent at an operating temperature of 12°C were evaluated to explore how nitrification and denitrification responded to different concentrations of …
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Biofiltration for Control of H2S from Wastewater Treatment Plant Gases
… was used to test the performance of a biofilter removing gaseous hydrogen sulfide generated in the headworks and a primary clarifier of a local Wastewater Treatment Plant. The contaminated gas stream is distributed upward through 1,718 m3 of filter material. With a flow rate varying …
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Biofiltración de compuestos orgánicos volátiles utilizando diferentes tipos de lecho basados en mezclas de compost de RSU-poda: monitorización mediante diversas técnicas
… and the abatement of VOCs by different compost biofilters was studied. VOCs removal efficiencies greater than 90% were obtained using composts of municipal solid waste (MSW) or MSW-pruning residue as biofilter material. An electronic nose identified qualitative differences among the biofilter …
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Temperature impact on nitrification and bacterial growth kinetics in acclimating recirculating aquaculture systems biofilters
… observed results. The performance of the biofilters was determined with three tank replicates at fixed temperatures of 13, 20 and 300C; and at diurnal transient (sinusoidal) temperature regimes of (20 ± 30C; 30 ± 30C). Ammonia utilization rates and biofilter performance for beads …
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Designing Smarter Stormwater Systems at Multiple Scales with Transit Time Distribution Theory and Real-Time Control
… removal in experimental laboratory-scale biofilters. This analysis is a significant step forward in our understanding of how physicochemical theories can be melded with hydrology, engineering design, and ecology to improve the water quality benefits of green infrastructure. Chapter 3 …
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Modeling thermal environment of a recirculating aquaculture system facility
… the daily heating, ventilation, water pumping, biofilter operation, and lighting energy requirements over a production cycle. The model was validated using temperature and energy data collected from RAS facility of Virginia Tech during 1992. Model simulations were performed with various …
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Performance, denitrification activity, and microbial community dynamics of denitrifying biofilters under fluctuating water level
… causing water quality degradation. Denitrifying biofilters have been identified as a technology that reduces the export of nitrate from tile-drained fields. A better understanding of the microbial communities that allow the biofilter to function may provide insight to improve performance. Two …
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