Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Virus removal"”.
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Virus Removal by Resinous Sorbents
Made available in DSpace on 2015-05-12T22:37:15Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7511717.PDF: 6745005 bytes, checksum: b356d29bba38e0e2f7fc9d16a05f3826 (MD5) Previous issue date: 1974
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Virus Removal by Chemical Coagulation
Made available in DSpace on 2014-12-08T23:57:20Z (GMT). No. of bitstreams: 1 7013275.pdf: 3885482 bytes, checksum: 851571426cc61690afba6997d0ef8d5a (MD5) Previous issue date: 1969
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Mechanism study of virus removal in membrane filtration and the application to improve virus removal
… control of the water quality. Pathogenic viruses in municipal wastewater can result in outbreaks of virus infection without sufficient removal. Membrane bioreactor (MBR) has shown its promise to remove virus in municipal wastewater treatment, but the major concern is the trade-off between …
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Iron oxide amended biosand filters for virus removal
… biosand filter (BSF) media would increase virus removal due to adsorption. The proposed mechanism is electrostatic adsorption of negatively charged virion particles to positively charged iron oxides formed during the corrosion of zerovalent iron. Initial tests conducted using continuous …
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Development of adsorption filtration process for virus removal for drinking water treatment
… of effective technologies for removing viruses. Although reverse osmosis can achieve high log removal it is not economical. The main objective of this study is to test and validate a novel adsorption filtration (AF) technology for removing viruses from GW sources for drinking water …
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Mechanism of virus removal and nutrient reduction and modification of bio-sand filter
… ammonia concentrations in the feed water on the removal of bacteriophage MS2 using bio-sand filters (BSFs) and analyze the formation of the bacterial community in BSFs, and modify BSFs with different packing materials and structures. Five bench-scale BSFs were constructed from 4 inches PVC. Two …
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Polysulfone ultrafiltration membranes impregnated with silver nanoparticles show improved biofouling resistance and virus removal
Biofouling and virus penetration are two significant obstacles in water treatment membrane filtration. Biofouling reduces membrane permeability, increases energy costs, and decreases the lifetime of membranes. In order to effectively remove viruses, nanofiltration or reverse osmosis (both high …
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The removal of low levels of poliovirus from water by coagulation with alum
Human enteric viruses are present at low levels in sources of potable water. Due to the low minimum infective dose required for such viruses, these low levels are of public health significance and will become more important as water reuse increases. The effectiveness of alum coagulation for virus …
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A global sensitivity analysis of solar virus inactivation modeling
… Solar-driven disinfection systems can inactivate virus in water through two major mechanisms: direct endogenous mechanism causes damage to viral components (e.g. DNA/RNA, proteins) upon their absorption of sunlight photons (mostly UVB); indirect exogenous inactivation refers to the viral component …
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Evaluation of Bromate Formation and Control using Preformed Monochloramine in Ozonation for Indirect Potable Reuse
… Level of 10 µg/L while exceeding 3-log or 99.9% virus removal credit. Preforming monochloramine in separate carrier water prior to addition upstream of ozonation eliminated the potential for disinfection byproduct formation when monochloramine is formed in the main water flow. This also allowed …
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Mathematical Modeling of Dengue Viral Infection
… response to each of the four serotypes of dengue virus, secondary infections of dengue put patients at higher risk for more severe infection as opposed to primary infections. The current hypothesis for this phenomenon is antibody-dependent enhancement, where strain-specific antibodies from the …
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Field and laboratory studies concerning the detection of enteric viruses in either settled or disinfected secondary sewage
… to utilize recycled waters. The elimination of viruses pathogenic to humans from recycled waters will depend on the removal efficiencies of treatment processes and the sensitivity of detection methodologies. Enteric viruses can survive current wastewater treatment practices, and some even …
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Quantifying uncertainty in pathogen removal, membrane integrity monitoring and health consequences in the treatment of drinking water
… Bounds Analysis, to examine uncertainty in removal of oocysts of Cryptosporidium and viruses in membranes used to treat drinking water. In chapter 2, we examined variability and uncertainty in the determination of parameters used in pressure-based direct integrity tests of hollow fiber …
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The development of a pseudo-mechanistic model of solar irradiation-induced inactivation of viruses in wastewater and natural waters
… inexpensive to construct and maintain. Beyond removal of chemical contaminants, they are exposed to solar irradiation which can enable the inactivation of viruses that are hazardous to human health. However, this sunlight disinfection is an unintentional byproduct of traditional WSP design, and …
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Generation and biological collection efficiency of MS2 bioaerosol for the evaluation of aerosol filtration devices
… to develop an experimental setup to evaluate the virus removal efficiency of an electrothermally regenerated activated carbon fiber cloth (ACFC) filter. MS2 bacteriophage was used as a model virus. Three tasks were conducted. The first task involved the development of a modified Liquid Sparging …
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Cloth Filter for Disaster Relief Water Treatment
… port to a filter, primarily for parasitic cyst removal. Currently, the commercial version of the waterbag uses an effective but expensive hollow-fiber membrane microfilter (>$10 each). This cost will likely decrease the use of the waterbag by relief organizations responding to large disasters. …