نتایج جستجو برای: introduction conventional water treatment consist of unit processes include coagulation

تعداد نتایج: 21390409  

Journal: :archives of hygiene sciences 0
zahra ahmadli department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran. mohammad fahiminia research center for environmental pollutants, qom university of medical sciences, qom, iran. reza ansari qom water and wastewater company, qom, iran. maryam savadkouhi department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran. azita anbaz department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran. akbar escandari department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran.

background & aims of the study: drinking polluted water can transmit diseases, so potable water treatment is one of the most challenging and complex systems in countries. continuous monitoring for evaluation process in water treatment plant is important. this study aims to investigate performance evaluation of qom water treatment plant to remove turbidity and coliform in 2005 - 2014. materials ...

ژورنال: سلامت و محیط زیست 2019

Background and Objective: Wastewater from pharmaceutical industry has high chemical oxygen demand as a result of the presence of organic drugs and antibiotics. In order to meet the environmental requirements, several treatment methods like chemical and electrochemical methods have been widely applied due to their high ability to remove organic compounds from pharmaceutical wastewater. Therefore...

2013
Mohammad Ali Zazouli Afshin Maleki Hassan Izanloo Reza Rezaee

This experimental study was conducted to investigate the effect of treatment of composting plant leachate by a coagulation-flocculation process. The effects of different dosages of coagulant and different pH values on the coagulation processes were compared. Ferric chloride and aluminium sulphate (alum) were tested as conventional coagulants. The experimental results show that a 18% removal of ...

Introduction: High bleeding due to hypolemia may cause early death. If injured persons hospitalized due to trauma, they may more likely to die. Methods for bleeding control include mechanical, heat treatment, drug therapy, or topical hemostats. The purpose of this study was to evaluate the efficacy of hemorrhage and their usages in all emergency bleeding cases (in the years of 2008-2019). In t...

Journal: :Journal of environmental sciences 2012
Yukun Hou Wenhai Chu Meng Ma

This work investigated the formation of carbonaceous and nitrogenous disinfection by-products (C-DBPs, N-DBPs) upon chlorination of water samples collected from a surface water and a ground water treatment plant (SWTP and GWTP) where the conventional treatment processes, i.e., coagulation, sedimentation, and filtration were employed. Twenty DBPs, including four trihalomethanes, nine haloacetic ...

2006
Joseph G. Jacangelo Jack DeMarco Douglas M. Owen Stephen J. Randtke

efore the 1970s, research into the nature of natural organic matter (NOM) in drinking water and into methods for its removal was driven primarily by the desire to remove color from public water supplies. Since then, several other problems associated with NOM have been identified, including its demand for coagulants and disinfectants, its potential to transport metals and hydrophobic organic che...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه خلیج فارس - دانشکده مهندسی 1393

in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...

ژورنال: سلامت و محیط زیست 2008
ززولی, محمدعلی, مصداقی نیا, علیرضا, ناصری, سیمین,

Background and Objectives: Natural organic matters (NOMs) are abundant in natural water resources and in many ways may affect the unit processes in water treatment. Although NOMs are considered harmless but they have been recognized as disinfection by-products (DBPs) precursors during the chlorination process. Formation of DBPs highly depends on the composition and concentration of NOMs. The ob...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

2001
J. Ma

Laboratory and full-scale experiments were conducted for enhancing the coagulation of stabilised surface waters with high organic content by permanganate preoxidation. It was indicated that permanganate preoxidation enhanced both the processes of coagulation and filtration of selected surface waters, River Songhua water, Qitaihe Reservoir water and Ba Reservoir water. Permanganate preoxidation ...

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