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 20 of 42 for “"Total coliforms"”.
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A comparison of two membrane filter techniques for the enumeration of total coliforms in potable water
… of two membrane filter techniques on coliforms exposed to varying chlorine residuals and contact times. An enrichment-step membrane-filter method (E-MF) involved the incubation of a filtered water sample on lauryl tryptose plus 1.5 per cent agar for two hours at 35°C prior to transfer …
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Water quality and business aspects of sachet-vended water in Tamale, Ghana
… factory-produced sachet-water samples had some total coliforms (range from 1 CFU/100ml to 115 CFU/100ml). All the 15 hand-tied sachet-water samples had total coliforms (range from 4 CFU/100ml to 2010 CFU/100ml). One sample recorded TNTC at a dilution factor of 10. The MF method showed little …
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Colonization of Biofilms in a Freshwater Stream by Escherichia Coli and Bacteroides
… streams has traditionally been assessed by fecal coliforms and Escherichia coli, but new research methods have allowed for the use of the anaerobic, enteric bacterium Bacteroides for molecular marker fecal detection. However, a confirmation of the presence of E. coli and Bacteroides in media other …
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An investigation of the effects of ozone in a recirculating aquacultural production system
… including: heterotrophic plate count, total coliforms, fecal coliforms, total solids, and total volatile solids. Results indicated ozone had a significantly positive effect in the recirculating aquacultural production system. Further study is recommended, however, to better understand …
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Microbiological Safety and Quality of Raw, Ready-to-Eat (RTE) Seafood Sold in Orange County, California
… to 2021. The presence of <em>E. coli </em>and total coliforms can indicate fecal or environmental contamination. The objective of this study was to evaluate the microbiological safety and quality of raw, RTE seafood sold in Orange County, CA. A total of 105 raw, RTE samples of sushi, ceviche, …
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Does it pay to be mature? Assessing the performance of a mature bioretention cell seven years post-construction
… months to determine initial flow reduction and total suspended solids, and nutrient removal. By monitoring for the same parameters, changes in cell performance since installation were quantified. ISCO automated stormwater samplers collected inflow and outflow composite samples from the cell, …
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Densities of indicator bacteria in urban and rural runoff
… sewage effluents. Analysis was performed on a total of 42 samples, 22 of which were taken at the urban and the rural sites and correlated with storm flow. The remaining 20 samples were taken, 5 at each of the 4 sites, in order to establish respective baseline densities for total coliform, fecal …
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Evaluating the technical performance and social acceptability of keg-shaped ceramic water filters in Northern Ghana
… Ceramica Tamakloe (CT) filters removed 91.9% of total coliforms and 96.0% of E. coli colonies. The control CT CPFs removed 98.5% of total coliforms and 99.4% of E. coli colonies. KWK turbidity removal averaged 58%, which was lower than the 78% removal achieved by the CPFs. Filtration rates for …
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Foodborne pathogens in poultry production and post-harvest control
… of Salmonella colonization. Generic E. coli and total coliforms were enumerated as indicators of fecal contamination in F7 and F8. Turkey cecal and crop contents, litter, drinkers, air, feed, feeder contents, and environmental swabs were sampled and tested for Salmonella and E. coli. Salmonella …
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Monitoring of Selected Bacteriological Parameters Associated with the Sinking Creek Total Maximum Daily Load (TMDL).
… to the state 303 (d) list and a TMDL for fecal coliforms developed. The study objectives were to 1) identify areas in Sinking Creek with elevated levels of fecal coliforms and 2) compare data collected to results from watershed models used in the TMDL. Fourteen sites on Sinking Creek were …
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The use of Pulsed Energy (Flashbast) technology in the shelf life extension of selected marine and freshwater fish species stored in ice
… (pâ ¤ 0.05) rates than those in the flesh. Total coliforms were the most susceptible bacteria to PET.
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Drinking Water Quality Monitoring
… were added for amber and red light, bringing the total to four LEDs for each. The LEDs were also positioned closer to the photomultiplier tube so as to increase sensitivity. For UV, only two LEDs were used as previous. The detection limit of the viable bacteria was ~50 live bacteria/L. No change …
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Assessment of ultraviolet light disinfection efficiency of advanced wastewater treatment plant effluent
… and consistent removal of fecal and total coliforms to less than 2.2 MPN/100 mL at dosages in the vicinity of 50-80 mW-s/cm{dollar}\sp2{dollar} UV transmittance varied from 40% to 70% over the monitoring period and was strongly correlated with turbidity. No diurnal variations in …
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Υγιεινολογικός έλεγχος των πόσιμων υδάτων του γεωγραφικού διαμερίσματος Ηπείρου
… The bacterial indicators of water pollution (total count, total coliforms, fecal coliforms and enterococci) were used in this study. Also, 334 strains grown on the m-Endo agar (enterobacteriaceae) were further identified. Fifteen hundred and fifty samples of potable water from the region of …
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PESQUISA DE coliformes totais e coliformes termotolerantes EM QUEIJOS TIPO COALHO PRODUZIDOS COM LEITE CRU NA REGIÃO DO AGRESTE PARAIBANO
… found in milk and consequently cheeses are coliforms. Coliforms are gram-negative rods, not sporulated, that ferment lactose within 48 hours. In general, the coliforms are represented by four genera of the family Enterobacteriaceae: Citrobacter, Enterobacter, Escherichia coli and …
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Approaches to modeling pathogen and natural organic matter removals in slow-rate biofilters
… filtration than that of Enterococci, E. coli and total coliforms. While variables remain unknown, the aforementioned microbiological contamination indicators can be modeled to within one log removal for a given source water and filter. Modeling natural organic matter, on the other hand, is …
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Potential groundwater contamination from pit latrines in Ga-Maja and Reefentse
… phosphate (PO₄³⁻), sodium (Na), sulphate (SO4), total organic carbon (TOC), pH, total dissolved solids (TDS) and electrical conductivity (EC). These are some important parameters for assessing the groundwater quality for drinking purposes. The South African National Standards (SANS 241) and the …
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Quantifying Potential Sources of Microbial Contamination in Household Drinking Water Samples
… wells and springs in 20 Virginia counties for total coliforms (TC) and E. coli (EC) along with a suite of chemical contaminants. Sample collection was organized by the Virginia Household Water Quality Program (VAHWQP), a Virginia Cooperative Extension effort managed by faculty in the Biological …
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Pollution prevention and treatability of phosphate laden wastewater in the seafood industry
… orthophosphate (OP), condensed phosphate (CP), total phosphate (TP), chemical oxygen demand (COD), total organic carbon (TOC), pH, and total suspended solids (TSS). Shrimp wastewater from industry one had an average pH of 6.06, COD of 4,750 mg/L, TSS of 270 mg/L, TOC of 1,990 mg/L, TP of 221,700 …
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Evaluation of the complementary use of the ceramic (Kosim) filter and Aquatabs in Northern Region, Ghana
… effective at removing 92% of turbidity, 99.4% of total coliforms, and 99.7% of E. Coli from unimproved water sources. However, the product water is still microbially contaminated. The purpose of this thesis is to explore the effectiveness of combining two household water treatment technologies, …
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