Showing results for: sewage treatment Articles
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Environmental infrastructure and socio-economic indicators in San Pedro Sula, Honduras
Access to water and sanitation was evaluated with respect to socio-economic factors for San Pedro Sula, Honduras (SPS), a medium-sized industrial city. A multidisciplinary analysis was conducted using socio-economic distribution and infrastructure assessments to determine the nature and extent of any existing inequalities. Although piped water access was nearly universal, socio-economic status ...
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Application of UV radiation or electrochemistry in conjunction with power ultrasound for the disinfection of water
Formerly power ultrasound was not considered economically viable for water treatment on an industrial scale. This was based on calculations involving direct scale-up of power consumption in small-scale laboratory experiments. Attitudes have changed with the installation of ultrasonic devices in operational water or sewage treatment plants. This work investigates the effect of the following ...
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Preparation and surface modification of hollow fibre membranes for drinking water disinfection and water reclamation
Polysulphone hollow fibres were spun according to phase inversion process under different conditions by extrusion of dimethylformamide solution of the polymer through double orifice spinneret using water or water-DMF mixture as gelation medium. The membrane surface was modified by in situ interfacial polymerisation of m-phenylenediamine with trimesoyl chloride. The nominal molecular weight ...
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Advanced process of microbiological control of wastewater in combined system of disinfection with UV radiation
The purpose of this study was to present a methodology with superior efficiency for inactivating pathogenic indicators commonly found in domestic sewage. The adopted method was based on synergistic effect resulting from the introduction of a UV radiation pre-disinfection stage of sewage followed by secondary treatment. A pilot unit was installed in the sewage treatment plant of the University of ...
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Portable water turbidity detector
Description: Water turbidity detector/water turbidity sensor uses the light wave scattering detection principle to detect the concentration of suspended matter and sludge in water through the number of light wave reflections. Our turbidity detector has low price and accurate measurementTurbidity detector- probe type Using laser scattering principle to measure the turbidity of water quality, laser ...
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Prevalence of virulence factors in
Escherichia coli isolated from healthy animals and water sources in BrazilThe aim of this work was to verify the presence of seven virulence factors (ST, LT, eae, stx1, stx2, INV and EAEC) among Escherichia coli strains isolated from healthy humans, bovines, chickens, sheep, pigs and goats, from two sewage treatment plants and from the Tietê River. We have found a high prevalence of eae, stx1 and stx2 in ruminants. The EAEC gene was only found in humans and sewage. No ...
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Occurrence and correlations between coliphages and anthropogenic viruses in the Massachusetts Bay using enrichment and ICC-nPCR
ABSTRACTWe evaluated a two-step enrichment procedure to detect coliphages and an integrated cell culture-nested polymerase chain reaction (ICC-nPCR) to detect human astrovirus, enteroviruses, rotavirus and adenovirus type 40 and 41 in marine water samples collected by the Massachusetts Water Resource Authority (MWRA). MWRA has been monitoring its receiving waters for coliphages, anthropogenic ...
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Effect of ozone on secondary effluent treatment for reuse in agriculture
The results of secondary effluents ozonation from domestic sewages treatment plants in Havana, Cuba are presented. The ozone effect on some physico-chemical parameters was determined. The ozone gas concentration is the parameter, which exerts the greatest influence on the ozone transferred. The results indicated that ozonation of secondary effluents is a safe disinfection alternative for ...
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Total coliphages removal by activated sludge process and their morphological diversity by transmission electron microscopy
This study was conducted to isolate phages in treated sewage collected from wastewater treatment plant, and explore their morphological diversity by transmission electron microscopy (TEM). Fates of total bacteriophages and their reduction by biological treatment were also assayed. Phages were isolated using the plaque assay then negatively stained and observed by electron microscope. Electron ...
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Lafouche Parish Work Release WWT Plant
A number of years ago, the Lafourche Parish Sheriff's Department in Louisiana instituted a new program to assist prisoners nearing release to transition back into society. This vehicle requires that inmates pay for their room and board while they learn work skills in industries such as shipbuilding, oil field services, food preparation, kitchen management and municipal water and wastewater ...
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Lafourche Parish Louisiana Sheriff’s department work release program - Case study
A number of years ago the Lafourche Parish Sheriff’s Department, State of Louisiana, instituted a new program to assist prisoners nearing release to transition back into society. This vehicle requires that inmates pay for their room and board while they learn work skills in industries, such as, shipbuilding, oil field services, food preparation, kitchen management and municipal ...
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High quality bathing water protects human health
The sewage treatment plant of Biarritz, France faced severe issues with inflowing water during heavy rain fall, resulting in untreated wastewater being diverted directly into the sea, alongside public beaches. A fast and reliable disinfection of the flow was needed. Kemira installed DesinFix disinfection technology which is designed for water reuse, and to handle such problematic flows safely and ...
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Mass balance analysis of triclosan, diethyltoluamide, crotamiton and carbamazepine in sewage treatment plants
The behavior of antibacterial triclosan, insect-repellent diethyltoluamide (DEET), anticonvulsant carbamazepine, and antipruritic crotamiton was investigated at two sewage treatment plants (STPs) to clarify their complete mass balance. Twenty-four-hour flow-proportional composite samples were collected from the influent and effluent of primary and final sedimentation tanks, a biofiltration tank ...
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Saving energy no uphill task with mountain water
Untitled Document Even in regions where it is abundant, water for human consumption must be treated before it is fit for use. Water sources in areas with karsts, crevasses and fissured rocks are frequently plagued by high turbidity and bacterial content. In these circumstances, membrane filtration represents an efficient method of treatment. In mountainous regions, for ...
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