نتایج جستجو برای: Waste Water

تعداد نتایج: 618843  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Journal: :health scope 0
jalaleddin mollaei department of environmental health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran seyed bagher mortazavi department of occupational health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran; department of occupational health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran. tel: +98-2182883845, fax: +98-2182883845 ahmad jonidi jafari department of environmental health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran; department of environmental health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran

background detergents and difficulties of their presence in the water and wastewater cause various problems such as foam production, anomalies in the growth of algae, and accumulation and dispersion in aqueous environments. objectives the aim of this study was to examine and compare the moving bed biofilm reactor with another reactor without media (carries) for anionic surfactants removal. mate...

Journal: :health scope 0
hooshyar hossini department of environmental health, tarbiat modares university, tehran, ir iran abbas rezaee department of environmental health, tarbiat modares university, tehran, ir iran; department of environmental health, tarbiat modares university, tehran, ir iran. tel: +98-2182883575, fax: +98-2182883575

conclusions the results of this study show that it is possible to remove nitrate, and its intermediates from waste water. regarding the desirability of the process, the field scale study is proposed. results the results showed that by applying electric current of 0.14 a for 120 minutes, the nitrate content would reduce down to 97%. the obtained r2 for the nitrate removal model was higher than 0...

Journal: :health scope 0
mahdi farzadkia department of environmental health engineering, school of health, iran university of medical sciences, tehran, ir iran edris bazrafshan health promotion research center, zahedan university of medical sciences, zahedan, ir iran; health promotion research center, zahedan university of medical sciences, zahedan, ir iran. tel: +98-9153411120; +98-9122588677

background sewage sludge (biosolids) is a byproduct of wastewater treatment that accumulates in large quantities. effective stabilization and disinfection of sewage sludge prior to land application are necessary to not only protect human health, but also to induce the public its benefits and safety. currently, many wastewater treatment plants in iran dispose great amounts of untreated sewage sl...

Journal: :international archives of health sciences 0
mostafaii gh.r. “social determinants of health research center” and “environment health department, public health faculty”, kashan university of medical sciences, kashan, iran miranzadeh m.b. no. 1, shabnam 4 alley, police square, kashan, iran khodadadi r. environmental health department, health faculty, kashan university of medical sciences, kashan, iran iranshahi l. environmental health department, health faculty, kashan university of medical sciences, kashan, iran alinejad a. environmental health department, health faculty, shahid beheshti university of medical sciences, tehran, iran hakimi n. environmental health department, health faculty, kashan university of medical sciences, kashan, iran

aims: regarding water as the main source of brio, not only its quantity and being availability is vital, but also its quality must be considered. this study was done in order to determine the correlation between physicochemical bod5 and microbiological parameters (fc and tc) in the kashan university of medical sciences wastewater effluent of activated sludge system.  materials & methods: this d...

2016
Zongqi Ma Guirong Wang Yufen Tian Deli Xu Xiaofeng Miao Ying Zhang Jiao Meng Hong Ni Weiwei Sun

Electroplating waste water is considered to be harmful to health of animals. In the present study, we tested the hypothesis that electroplating waste water would suppress immune functions in Kunming mice. Twenty-six mice were randomly divided into the control group (n = 13) and the experimental group (n = 13), in which the latter drank electroplating waste water. We found that body mass and mos...

Journal: :آب و خاک 0
محمّدی محمّدی فتوت فتوت حق نیا حق نیا

abstract in order to investigate the removal of copper, nickel, zinc and chromium from industrial waste water by a sand–soil–organic matter filter column, this experiment was conducted at a completely randomized design with sixteen treatments and four replications. p.v.c tubes (columns) with 66.5 cm height and 10 cm diameter were chosen and filled from down to top by coarse gravel (15 cm), sand...

Journal: :international archives of health sciences 0
borghe-ei s.m. goodarzi j. mohseni m. amouei a. ganj afrooz street, babol university of medical sciences, babol, iran. postal code: 4774547176

aims: chromium is one of the most important metallic pollutants in plating industry wastewater. this toxic metal is a serious threat to human health and to the environment due to its cumulative effects and non-degradability. this research intended to study the effects of ph, contact time, and voltage on the degree of chromium removal from wastewater of plating industry by using the electrocoagu...

Journal: :health scope 0
reza barati roshvanlo department of environmental health, tarbiat modares university, tehran, ir iran abass rezaee department of environmental health, tarbiat modares university, tehran, ir iran; department of environmental health, tarbiat modares university, tehran, ir iran. tel/ fax: +98-2182883575 hooshyar hossini department of environmental health, tarbiat modares university, tehran, ir iran mohamad shiri department of environmental health, tarbiat modares university, tehran, ir iran

conclusions based on nitrification and denitrification data, the best condition for nitrifying/ denitrifying performance was obtained by modified-ifas. hence, the modification can be used to obtain the best activities of microbial and nitrogen removal improvement. results employing the bet, surface area (sa), total pore volume (vp), and average size of the nanostructure were 0.4026 m2/g, 3.8089...

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