scholarly journals Removal Capability of Carbon-Soil-Aquifer Filtering System in Water Microbiological Pollutants

10.5772/46208 ◽  
2012 ◽  
Author(s):  
W.B. Wan ◽  
M.M. Rahman ◽  
M.F. Ahmad ◽  
J. Ahmad ◽  
A. M
Keyword(s):  
Microbiological Pollutants

scholarly journals Advanced Electron Beam (EB) Wastewater Treatment System with Low Background X-ray Intensity Generation

2021 ◽  
Vol 11 (23) ◽  
pp. 11194
Author(s):  
Urszula Gryczka ◽  
Zbigniew Zimek ◽  
Marta Walo ◽  
Dagmara Chmielewska-Śmietanko ◽  
Sylwester Bułka
Keyword(s):  
Wastewater Treatment ◽  
Electron Beam ◽  
Textile Industry ◽  
Low Cost ◽  
Treatment Facility ◽  
Protection Measures ◽  
X Ray ◽  
Confined Spaces ◽  
Microbiological Pollutants ◽  
Stream Formation

Electron beam wastewater treatment is a very effective method for the destruction of organic and microbiological pollutants. The technology was implemented for municipal and textile industry wastewater treatment. Availability of electron accelerators characterized with different operation parameters make the technology applicable for different end-users and also for installation in confined spaces. In such a case, the design of wastewater irradiation room has to take into account the limited space available for shielding construction, which must restrict X-ray emission. Considering construction of an irradiation room for water treatment facility, it is important to focus not only on a stream formation for irradiation to achieve the desired electron penetration, but also on the reduction in x-ray generation. In the presented work, the X-ray field was tested, using modelling and experimental methods. The final results gave an advanced solution, which can be used in the installation of wastewater treatment, ballast and other types of origin, providing low cost shield and good radiation protection measures.

scholarly journals Polymeric Geomembranes Used in Municipal Waste Facilities

2020 ◽  
Vol 57 (3) ◽  
pp. 117-124
Author(s):  
Doru Mihai ◽  
Narcisa Elena Pogurschi ◽  
Nicoleta Daniela Sarbu ◽  
Constanta Valentina Tudor ◽  
Adina Horablaga ◽  
...  
Keyword(s):  
Crosslinking Density ◽  
Municipal Waste ◽  
Degree Of Crystallinity ◽  
Household Waste ◽  
Cement Stone ◽  
Microporous Material ◽  
Ongoing Research ◽  
Microbiological Pollutants ◽  
And Diffusion ◽  
The Degree Of Crystallinity

This research aims to establish the behaviour of geomembranes used for base sealing and for covering municipal waste facilities. The geomembranes used for base sealing are subjected to leachate pressure and to the action of chemical and microbiological pollutants. Geomembranes used for covering waste facilities are subjected to the action of precipitation water and released gases. This paper analyzes the following: the permeability mechanism of geomembranes made of polymers, the process of water vapours diffusion through polymers, diffusion flow, characteristic of permeability and influencing factors. The study also presents data on the permeability of some polymers - the most commonly used in the structure of geomembranes used in household waste facilities - as well as some of the results of ongoing research on the behaviour of high density polyethylene geomembranes in contact with the waste facilities� leachate. Diffusion was determined by measuring the weight of the vessel (water loss) daily for 30 days. The polymer influences the permeability and diffusion through the molecular and intermolecular chemical structure, the packing density, the degree of crystallinity, the crosslinking density and through the flexibility of the macromolecular chains. The results show that the permeability of polymeric geomembranes is comparable to that of a microporous material (cement stone, bentonite).

scholarly journals Main Microbiological Pollutants of Bottled Waters and Beverages

2019 ◽  
pp. 403-422 ◽  
Author(s):  
Carmen Curutiu ◽  
Florin Iordache ◽  
Petruta Gurban ◽  
Veronica Lazar ◽  
Mariana Carmen Chifiriuc
Keyword(s):  
Microbiological Pollutants

Use of nanofiltration for potable water from an aquifer recharged with wastewater

2008 ◽  
Vol 57 (6) ◽  
pp. 927-933 ◽  
Author(s):  
A. Aguilar ◽  
B. Jiménez ◽  
J. E. Becerril ◽  
L. P. Castro
Keyword(s):  
Ames Test ◽  
Potable Water ◽  
Dibutyl Phthalate ◽  
Tetrahymena Pyriformis ◽  
Fecal Coliforms ◽  
Nanofiltration Membranes ◽  
Somatic Coliphages ◽  
Removal Efficiencies ◽  
Microbiological Pollutants ◽  
Almost All

This paper presents the comparison of nine nanofiltration membranes to treat water coming from an aquifer recharged with wastewater and used as municipal supply in the Tula Valley, Mexico. The comparison was made based on (a) the amount of water produced; (c) the capability to produce a <1 mg TOC/L effluent without entirely eliminating salts, (b) the removal of specific organic and microbiological pollutants, and (c) the reduction of toxicity and mutagenicity from water. From the tested membranes, only four produce an effluent with <1 TOC mg/L, and three totally retained dibutyl phthalate, diethyl phthalate and hydroxytoluene butylate. Influent mutagenicity (Ames test) was negative but these was a certain degree of toxicity when Tetrahymena pyriformis was used as indicator. Toxicity was partially reduced by some of the NF membranes. The best membrane had a flux of 95 L m−2h−1 and removal efficiencies of 98% for TOC, 92% for AUV254, and 92% for TDS. The permeate had a final hardness of 76 mg/L and an alkalinity of 124 mg/L. Additionally, this membrane removed totally specific organic compounds, total and fecal coliforms and almost all the somatic coliphages.

Levels of chemical and microbiological pollutants in the vicinity of a waste incineration plant and human health risks: Temporal trends

Chemosphere ◽  
2011 ◽  
Vol 84 (10) ◽  
pp. 1476-1483 ◽  
Author(s):  
Lolita Vilavert ◽  
Martí Nadal ◽  
María J. Figueras ◽  
Vikas Kumar ◽  
José L. Domingo
Keyword(s):  
Human Health ◽  
Health Risks ◽  
Temporal Trends ◽  
Waste Incineration ◽  
Incineration Plant ◽  
Human Health Risks ◽  
Microbiological Pollutants

scholarly journals Microbiological pollutants in air and antibiotic resistance profile of some bacterial isolates

2016 ◽  
Vol 5 (1) ◽  
pp. 47-56
Author(s):  
Md Shahinur Kabir ◽  
Farzana Mridha ◽  
Salma Islam ◽  
Md Shorifujjaman
Keyword(s):  
Antibiotic Resistance ◽  
Health Hazard ◽  
Microbiological Quality ◽  
Penicillin G ◽  
Resistant Bacteria ◽  
Outdoor Air ◽  
Resistance Profile ◽  
Antibiotic Resistance Profile ◽  
The People ◽  
Microbiological Pollutants

Microbiological quality assessment is one of the most important investigations to determine the pollution of indoor and outdoor air. To evaluate the microbial load in air, samples were collected from 3 different outdoor and 3 different indoor sites within Jahangirnagar University campus. In outdoor air, bacterial and fungal counts varied from 117 - 7284 CFU/m3 and 88 - 5287 CFU/m3, respectively. On the other hand, in indoor air bacterial and fungal counts varied from 440 - 6226 CFU/m3 and 88 - 5874 CFU/m3, respectively. Furthermore, to reveal the antibiotic resistance profile, Staphylococcus aureus isolates were subjected to antibiogram study against 14 antibiotics. Among the isolates, 87.5% exhibited resistance to ceftazidime; 50% to penicillin G; 31.25 % to cefotaxime; 25 % to ceftriaxone, cefuroxime, cloxacillin; and 18.75% to amoxicillin. None of the isolates showed resistance to amikacin, ciprofloxacin, erythromycin, gentamicin, imipenem, nitrofurantoin and vancomycin. The presence of antibiotic-resistant bacteria in air may cause serious health hazard to the people living in this area.Jahangirnagar University J. Biol. Sci. 5(1): 47-56, 2016 (June)

scholarly journals The Impact of Microbiological Pollutants on School Indoor Air Quality

2017 ◽  
Vol 05 (05) ◽  
pp. 54-65 ◽  
Author(s):  
Peter Fsadni ◽  
Bezzina Frank ◽  
Claudia Fsadni ◽  
Stephen Montefort
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Microbiological Pollutants ◽  
The Impact
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