نتایج جستجو برای: disinfection process

تعداد نتایج: 1319631  

2015
Hamed M El-Mashad Zhongli Pan

Submit Manuscript | http://medcraveonline.com MOJ Food process Technol 2015, 1(2): 00011 process costs and operational complications are limiting factors for such combination. New disinfection methods and media are needed to overcome the disadvantages of the current technologies [3]. Nanomaterials are emerging and promising fungicidal, algicidal, and bactericidal media that could be applied for...

2016
Terry M. Gellner Kim Riddle Donna Francy

Wastewater treatment plants in Ohio and elsewhere in the U.S. operating with MBR systems are required to disinfect permeate. This requirement results in an increased cost to both capital and O&M, and with chlorination there is a potential increase in the formation of disinfection byproducts. Disinfection following MBR treatment may not be needed if the MBR process alone removes microorganisms a...

2003
F. Absi F. Gamache R. Gehr P. Liechti J. Nicell

An ozonation pilot plant was installed at the Montréal Urban Community Wastewater Treatment Plant (MUCWTP) to assess the feasibility of employing a full scale ozone disinfection system. Wastewater characteristics such as turbidity, COD, TOC, BOD, pH, ORP and suspended solids were monitored to assess their effect on ozone disinfection. Fecal conforms (FC) were used as indicators to measure disin...

Journal: :Arquivos de gastroenterologia 2006
Alexandre P Machado Ana Teresa Mancini Pimenta Paulo P Contijo Stephan Geocze Olga Fischman

BACKGROUND [corrected] Endoscopes are routinely used in hospitals and clinics of the world and they can be potential sources of cross-infection when the decontamination process is unsuitable AIM The routines of flexible endoscope (bronchoscopes, esophagogastroduodenoscopes and colonoscopes) disinfection procedures used in two Brazilian university hospitals were evaluated during a 3-year perio...

Journal: :Chemosphere 2011
Yanmin Chen Anhuai Lu Yan Li Ho Yin Yip Taicheng An Guiying Li Peng Jin Po-Keung Wong

The photocatalytic disinfection of Escherichia coli K-12 is investigated by the natural sphalerite (NS) under different spectra, wavelengths and intensities of visible light (VL) emitted by light-emitting-diode lamp (LED). The spectrum effect of VL on disinfection efficiency is studied by using white LED, fluorescent tube (FT) and xenon lamp (XE), which indicates that the "discreted peak spectr...

ژورنال: سلامت و محیط زیست 2015
شمس خرم آبادی, قدرت اله, منصوری, مریم السادات, گودینی, حاتم,

Background and Objective: Natural organic matters (NOM) are known as precursors to disinfection byproducts. As conventional treatment processes cannot get disinfection by-product standards, novel methods have been increasingly applied for the removal of disinfection by-products precursors. The UV/ZnO process is one of the advanced oxidation processes using photocatalytic technology. The present...

2014
Hassan Aslani Ramin Nabizadeh Mahmood Alimohammadi Alireza Mesdaghinia Kazem Nadafi Reza Nemati Maryam Ghani

BACKGROUND AND OBJECTIVES Water shortage problems have led to find either new water resources or improve wastewater treatment technologies in order to reuse. Due to less performance of previous units in microbial removal, disinfection has become a necessary step in wastewater treatment plants. In the present study performance of hydrogen peroxide (HP) and modified Fenton's reagent (HP + Cu(++))...

2017
Sourav Das Neha Ranjana Ananyo Jyoti Misra Mrutyunjay Suar Amrita Mishra Ashok J. Tamhankar Cecilia Stålsby Lundborg Suraj K. Tripathy

Water borne pathogens present a threat to human health and their disinfection from water poses a challenge, prompting search for newer methods and newer materials. Disinfection of Gram-negative bacterium Escherichia coli and Gram-positive coccal bacterium Staphylococcus aureus in aqueous matrix was achieved within 60 and 90 minutes respectively at 350C using solarphotocatalysis mediated by sono...

2017
Sourav Das Neha Ranjana Ananyo Jyoti Misra Mrutyunjay Suar Amrita Mishra Ashok J. Tamhankar Cecilia Stålsby Lundborg Suraj K. Tripathy

Water borne pathogens present a threat to human health and their disinfection from water poses a challenge, prompting the search for newer methods and newer materials. Disinfection of the Gram-negative bacterium Escherichia coli and the Gram-positive coccal bacterium Staphylococcus aureus in an aqueous matrix was achieved within 60 and 90 min, respectively, at 35 °C using solar-photocatalysis m...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2015
Paula Peixoto Assemany Maria Lucia Calijuri Eduardo de Aguiar do Couto Aníbal Fonseca Santiago Alberto José Delgado Dos Reis

The production of different species of microalgae in consortium with other micro-organisms from wastewaters may represent an alternative process, to reduce the costs, for obtaining biofuels. The aim of this study was to evaluate the influence of pre-ultraviolet disinfection (UV) in the production of lipids from biomass produced in high rate ponds. Two high rate algal ponds were evaluated: a pon...

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