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THE USE OF OXYGEN IN CATALYTIC OXIDATION OF SULFIDES IN TANNERY WASTES
Tannery wastewater Sulfide removal catalytic aeration Natural aeration
2010/1/5
With its well-known biological toxicity, the excessive concentrations of sulfide in tannery wastewaters may upset the biological treatment processes, thus leading to a substantial decrease in the effi...
PARAMETERS AFFECTING NOISE INDUCED HEARING LOSS IN INDUSTRY
Noise intensity Industries noise
2010/1/5
The paper is based on a study conducted in three different industries on 84.4 on their employees to determine the effect of over all noise intensity, length of employment and rest periods among them. ...
To study the relation between hypertension and noise exposure, after the noise monitoring is weaving and spinning workshops, a especially designed questionnaire was completed and measurement were made...
A STUDY OF CHANGES IN VENTILATORY CAPACITY OF WORKERS EMPLOYED IN VEGETABLE OIL REFINERES IN TEHRAN
CHANGES VENTILATORY CAPACITY WORKERS EMPLOYED VEGETABLE OIL REFINERES TEHRAN
2010/1/4
Lung function tests were performed in 122 workers of vegetable oil refineries in Tehran area. The results show an increase in respiratory impairment with age and length of exposure. Among the four ind...
BIOLOGICAL REMOVAL OF Cr (VI) FROM INDUSTRIAL WASTEWATER (AEROBIC & ANAEROBIC CONDITION)
Biological Cr (VI) removal Fixed film Biological processes
2010/1/4
This Research was conducted in continuous flow bench scale Fixed Activated sludge (FAS) and Anaerobic Filter (AF). The main objective of the research was to study the feasibility and efficiency of the...
A SURVEY OF SOUTH TEIIRAN TEXTILE WASTE WATERS
Textile wastewaters Environmental pollution Textile industries
2010/1/4
The industrial effluents of three textile plants in the south of Tehran were studied. In each plant all related factors such as raw material consumption, production processes and water use at differen...
APPLICATION OF PACT SYSTEM TO INCREASE TEHRAN OIL REFINERY EFFLUENT TREATMENT EFFICIENCY
Refinery effluent treatment Oil refinery waste water PACT process (Simultaneous activated sludge and powdered activated carbon system)
2010/1/4
This research was done in order to determine the basic criteria for “Tehran Oil Refinery Effluemt TreatmentUnit” to prove the feasibility of the application of powdered activated carbon in aeration zo...
A STUDY OF ANAEROBIC FILTER FOR DOMESTIC AND SLAUGHTER HOUSE WASTE WATER TREATMENT
Domestic wastewater Slaughter house wastewater treatment
2010/1/4
To study the feasibility of anaerobic filter in raw sewage and slaughter house wastewater treatment, slaughter house wastewater treatment, a batch flow pilot plant was designed. In phase one, with a d...
STARTUP OF UPELOW ANAEROBIC SLUDGE BLANKET REACTOR FOR INDUSTRIAL WASTEWATER TREATMENT
Anaerobic sludge blanket reactor Anaerobic granule formation
2010/1/4
Up flow anaerobic sludge blanket (UASB) reactors have been increasingly used for industrial wastewater treatment. Because of existing problems in startup step of these reactors, in this research the s...
RADIU-226 CONTENT IN SOIL OF THE HIGH NATURAL BACKGROUND RADIATION AREA OF RAMSAR (IRAN)
RADIU-226 CONTENT SOIL HIGH NATURAL BACKGROUND RADIATION AREA
2010/1/4
The existence of a high natural radiation area in the northern part of Iran (Ramsar) is proved. Ra 226 in soil is measured. The results are: minimum 23.5 pCi/g and maximum 999 pCi/g soil. Environmenta...
TRIHALOMETHANES IN THE DRINKING WATER OF TEHRAN
Disinfection By-Products Halogenated Organics
2010/1/4
Natural sources of water contain some halogenated organic compounds after disinfection by chlorine. Trihalomethanes are one group of the chlorination by products that suspected of being carcinogenic i...
EFFECTS OF HIGH-SPEED DRILL NOISE ON DENTISTS’ HEARING
EFFECTS HIGH-SPEED DRILL NOISE DENTISTS’ HEARING
2010/1/4
The study deals with noise problems associated with the use of air-turbine drills in dental practice. Noise level measurements were made on various types of dental handpieces, when operated free runni...
A SURVEY ON ATTITUDES AND KNOWLEDGE OF JALIL-ABAD RURAL COMMUNITY IN RELATION TO DRINKG WATER
ATTITUDES KNOWLEDGE JALIL-ABAD RURAL COMMUNITY RELATION DRINKG WATER
2009/12/31
For purposes of planning and programming of environmental health activities at the community level, it is important to gather information regarding people's need, demands, and the basic socio demograp...
ENVIRONMENTAL MANAGEMENT FOR MALARIA CONTROL
Environmental management Prevention and elimination of malaria
2009/12/31
Environmental management for malaria control is defined as any planned physical activities that through transformation of land, water and vegetation will result in the prevention, reduction or elimina...
MICROBIOLOGICAL AND SOME CHEMICAL APPRAISAL OF OUTDOOR PUBLIC SWIMMING POOLS IN TEHRAN,IRAN
Swimming pools Bathing water Chemistry swimming pools criteria
2009/12/31
In order to determine the hygiene indices of bathing water, and it's water quality, a survey and laboratory analysis was recently undertaken on 34 outdoor public swimming pools out of a total 126 in T...