ORIGINAL_ARTICLE
Investigation of the relationship between depth of overhang and amount of daylight indicators in office buildings of Kerman city
Background: The use of daylight in offices has become an effective strategy to improve the quality of indoor space and energy efficiency. There is enough potential to have daylight autonomy in Kerman as a city with more than 300 sunny days a year. Therefore, this study aimed to investigate the relationship
between facades configuration and the amount of daylight in office buildings of Kerman.
Methods: This study was carried out based on the simulation in DesignBuilder software (DBS). In this study, 36 typical rooms, with the same physical characteristics (4 m×6 m×4 m), with window-to-wall ratio (WWR) between 10- 90% with four overhang depths (0, 0.5, 1 and 1.5 m) were modeled.
Results: Based on daylight utilization, the results indicate that an optimal WWR for a room with 1 m overhang depth ranged from 50% to 70%. Also, the room with 0.5 m overhang depth and without overhang, had suitable daylight while WWR was at least 50%, but the room with 1.5 m depth would not
encounter glare problem even when WWR was 90%.
Conclusion: The results confirm that overhang depth and WWR have significant effect on daylight parameters such as daylight factor (DF), work plane illuminance (WPI), and WPI ratio. Hence, these insights can be useful for designers to design buildings with lower energy use and higher daylight
quality, when enough light is provided in office rooms.
http://ehemj.com/article-1-372-en.pdf
2018-10-17
129
136
10.15171/EHEM.2018.18
Sunlight
Office
Kerman
Uniformity
Design software
Ali
Yazhari Kermani
ali_yazhari56@yahoo.com
1
Department of Architecture, School of Architecture and Urbanism, Art University of Isfahan, Isfahan, Iran
AUTHOR
https://orcid.org/0000-0002-4888-8112
Farshad
Nasrollahi
f.nasrollahi@aui.ac.ir
2
Corresponding Author: Department of Architecture, School of Architecture and Urbanism, Art University of Isfahan, Isfahan, Iran
AUTHOR
Mohammadjavad
Mahdavinejad
Mahdavinejad@modares.ac.ir
3
Department of Architecture, School of Architecture and Urbanism, Tarbiat Modares University, Tehran, Iran
AUTHOR
ORIGINAL_ARTICLE
Slaughterhouse wastewater treatment by combined anaerobic baffled reactor and anaerobic filter: study of OLR and HRT
optimization in ABR/AF reactors
Background: Slaughterhouse wastewater (SWW) is hardly treated due to the large amount of organic matter, nutrients and suspended solids. These materials are naturally decomposed through biological processes, and then environmental pollution, transmission of pathogens and problems become smelled. Conventional purification methods require high investment costs, high energy consumption and expert workforce. Therefore, the efficient and sufficient treatment of SWW with low cost, efficient construction and operation is important.
Methods: A combined anaerobic system consisting of three pilot-scale anaerobic baffled reactors (ABRs) in the first stage and three anaerobic filters (AFs) were used to treat SWW. The ABR reactors arranged at three hydraulic retention times (HRTs) of 12, 18 and 24 hours and organic loading rates
(OLRs) of 4, 7 and 10 kg/m3/d. The OLR applied for ABR reactors, was 0.5 to 1.55 kg COD/m3/d.
Results: Evaluation of the ABR reactor indicated that this reactor at OLR of 7 and 10 kg COD/m3/d and HRT of 18 hours, had removal efficiency of 83.29% and 85.79%, respectively. AF reactor, at OLR of 0.981, 0.576 and 0.561 kg COD/m3/d and HRT of 36 hours, had removal efficiency of 79.39%, 74.09%
and 63.14%, respectively.
Conclusion: The optimum HRT and OLR were 24 hours and 7 kg COD/m3/d and 36 hours and 1 kg COD/m3/d in ABR and AF reactor, respectively.
http://ehemj.com/article-1-373-en.pdf
2018-10-17
137
142
10.15171/EHEM.2018.19
Waste water
Slaughterhouse
Anaerobic treatment
Zabihollah
Yousefi
zyousefi2004@gmail.com
1
Corresponding Author: Department of Environmental Health Engineering, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR
https://orcid.org/0000-0001-9251-2668
Mohammad
Behbodi
mbjouybari@yahoo.com
2
Department of Environmental Health Engineering, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR
Reza Ali
Mohammadpour
mohammadpour2002@yahoo.com
3
Department of Biostatistics, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR
https://orcid.org/0000-0003-2353-5027
ORIGINAL_ARTICLE
Increasing convergence rate in two-objective optimization of water distribution network with engineering judgment
Background: Water distribution networks (WDNs) are facilities that require massive investment and their optimization is very important. This study aimed to optimization and development of models for promoting WDNs with using engineering judgment. In this method, instead of controlling all system states,
it is possible to search the optimal set of options based on engineering judgment and hydraulic and physical status of the system. Thus, the time to solve the optimization problem is greatly reduced, which is very important in widespread networks with many components. The case study was a WDN in western Tehran.
Methods: To reduce the calculation size and increase the convergence rate using engineering judgment, the parts of the network where there was no possibility of parallel piping was ignored. For other parts with a low pressure problem, parallel piping was defined. A FMGA and WaterGEMS hydraulic software were used to optimize the WDN. Cost minimization and pressure benefit maximization were the objective functions and the diameters of the pipes were considered to be the decision variables.
Results: The results of optimization the network showed that, the cost decreased 89.84% and the pressure in all nodes, except one node, reached within the standard range (26-60 mH20). It included 2387 m of pipe with diameters of 100, 150, 200, 250, 350, 400 and 500 mm.
Conclusion: The results of optimization and modification of the network using engineering judgment confirm that the cost decreased significantly and the pressure level in all the nodes increased to above the allowable minimum pressure.
http://ehemj.com/article-1-364-en.pdf
2018-10-07
143
151
10.15171/EHEM.2018.20
Water
Judgment
Software
Pressure
Engineering
Fariba
Sherri
faribasherri@gmail.com
1
Department of Environmental Engineering, School of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
AUTHOR
https://orcid.org/8303-1444-0002-0000
Amir Hossein
Mahvi
ahmahvi@yahoo.com
2
Corresponding Author: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
AUTHOR
https://orcid.org/0000-0001-8733-1483
Abbas
Toloie Eshlaghy
toloie@gmail.com
3
Department of Industrial Management, school of Management and Economic, Science and Research Branch, Islamic Azad University, Tehran, Iran
AUTHOR
Amir Hessam
Hassani
ahhassani@srbiau.acir
4
Department of Environmental Engineering, School of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
AUTHOR
ORIGINAL_ARTICLE
Assessment of air pollution in exercise centers and health risks
Background: In recent years, Tehran has faced major problems with air pollution for many reasons, and this issue has become a critical point in most of the days. However, less attention has been paid to the indoor air pollutants in exercise centers and their possible health effects. In this research, it was tried to briefly describe the characteristics and chemical composition of the aerosols present in the exercise centers of Tehran.
Methods: Sampling was carried out by a high volume sampler with a value of 1.5 m3/min. Fiberglass filters were used to sample aerosol particles. The samples were then studied by scanning electron micrograph (SEM) method.
Results: The results showed that average concentration of aerosol particles in the indoor and outdoor sports halls was 125 and 162 μg/m3, respectively. Therefore, there was a minor difference in the aerosols concentration inside and outside the sports venues during the competition period and in the presence of athletes. Also, chemical composition and morphology of the aerosol particles showed that there was a minor difference between the atmospheric particles inside and outside the exercise centers. Major elements found in the PM2.5 aerosol were Si, O, C, Mg, Ca, Mn and K. In general, common major crustal elements found in the atmospheric particles over all the sites were Si, Al, and Fe.
Conclusion: It seems that many citizens of the polluted cities exercise indoor because of causes other than outdoor air pollution such as lack of time or appropriate facilities. Thus, it is necessary for all students, athletes, people and other health workers involved in sports and exercise medicine to know
briefly about indoor air pollutants and its possible health effects on athletes who exercise in these environments.
http://ehemj.com/article-1-366-en.pdf
2018-10-07
153
157
10.15171/EHEM.2018.21
Air pollution
Athletes
Aerosols
Outdoor
Balal
Oroji
Balaloroji@yahoo.com
1
Department of Environmental Sciences, School of Natural Resources and Environmental Sciences, Malayer University, Malayer, Hamadan, Iran
AUTHOR
https://orcid.org/0000-0001-8691-8397
Eisa
Solgi
e.solgi@yahoo.com
2
Corresponding Author: Department of Environmental Sciences, School of Natural Resources and Environmental Sciences, Malayer University, Malayer, Hamadan, Iran
AUTHOR
https://orcid.org/0000-0002-5405-9513
Asghar
Sadighzadeh
a.sadigzadeh@aeoi.org.ir
3
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
AUTHOR
https://orcid.org/0000-0002-1684-3024
ORIGINAL_ARTICLE
Sulfur dioxide emissions in Iran and environmental impacts of sulfur recovery plant in Tabriz Oil Refinery
Background: Combustion of fossil fuels contributes to sulfur dioxide (SO2) emissions. To deal with this issue, the government of Iran has appointed the oil refineries to upgrade their installations and produce high quality fuels. Thus, this study investigated the status of SO2 emissions in Iran and the capability of
advanced technologies to control SO2 emissions.
Methods: The status of SO2 emissions was reviewed and discussed through national online reports. Meanwhile, the environmental impacts of sulfur recovery and tail gas treatment (TGT) plant (STP) were assessed by applying rapid impact assessment matrix (RIAM) for implementation and nonimplementation alternatives in Tabriz Oil Refinery Company (TORC).
Results: SO2 emissions have been increased by 2.1 times during 2004-2014 in Iran. Power plants and transportation play a significant role in this regard and overall contribute 82% of emissions. Among the other fossil fuels, fuel oil and gasoil account for 95% of SO2 emissions. Based on the environmental
impact assessments (EIAs), sulfur recovery management and enhancing sulfur removal efficiency from flue gas up to 99.9% are two main positive environmental aspects of STP project that would enable TORC to prevent 87 600 tons of SO2 emissions, annually. Nevertheless, flue gas and sour gas streams which have been determined as probable pollution sources of process, should be managed through proper monitoring framework.
Conclusion: The increasing trend of SO2 emissions and significant role of fuel oil and gasoil has required Iranian oil refineries to enhance the quality of fuels by employing clean and cost-effective technologies.
http://ehemj.com/article-1-365-en.pdf
2018-10-07
159
166
10.15171/EHEM.2018.22
Air pollution
Fossil fuels
Oil and gas industry
Environmental assessment
Tabriz
Shokufeh
Delfi
delfishokufeh@yahoo.com
1
Department of Environmental Health Engineering, School of Health, Tabriz University of Medical Sciences, Tabriz, Iran
AUTHOR
https://orcid.org/0000-0001-9762-0166
Mohammad
Mosaferi
mosaferim@tbzmed.ac.ir
2
Corresponding Author: Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
AUTHOR
https://orcid.org/0000-0001-6251-147x
Ali
Khalafi
khalafi.a@gmail.com
3
Department of Chemical Engineering, School of Chemical Engineering, University of Tehran, Tehran, Iran
AUTHOR
https://orcid.org/0000-0001-6037-9399
Khaled
Zoroufchi Benis
kh.zoroufchi.b@gmail.com
4
Department of Chemical Engineering, School of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
AUTHOR
https://orcid.org/0000-0002-7718-1474
ORIGINAL_ARTICLE
Effects of pistachio processing wastewater on treatment efficiency of urban wastewater using activated sludge process
Background: In this study, the effect of wastewater produced by pistachio processing in processing terminals on wastewater treatment plants with activated sludge process was investigated.
Methods: The pilot of activated sludge was constructed at the laboratory scale similar to wastewater treatment plant in Kerman and it was investigated in different ratios of the wastewater of pistachio processing with urban wastewater and return sludge ratios of 50% and 75%. The best reactor efficiency
in treating pistachio processing wastewater was obtained at a ratio of 5% with urban wastewater and return sludge of 50% plus 5 and 10% with urban wastewater and return sludge of 75%.
Results: The removal efficiency in the reactor in the aforementioned ratios was obtained to be 96.9%, 98%, and 96.2% for COD, 95.7%, 97.2%, and 93.3% for BOD5, and 7.1%, 99%, and 96.97% for phenolic compounds, respectively. The removal efficiency of BOD5 and COD reduced with the increase in
the ratios of pistachio processing wastewater especially with the presence of phenolic compounds. The one-way analysis of variance (ANOVA) indicated that in the aforementioned ratios of pistachio processing wastewater with urban wastewater, the mean COD and BOD5 in the output wastewater were
significantly lower than the standards of Iranian environmental organization and guidelines of World Health Organization (WHO).
Conclusion: Activated sludge process is able to remove organic compounds of pistachio processing wastewater at a ratio of 5% and return sludge of 50% along with ratios of 5 and 10% and return sludge of 75% with urban wastewater with a high efficiency.
http://ehemj.com/article-1-370-en.pdf
2018-10-13
167
174
10.15171/EHEM.2018.23
Activated sludge process
Wastewater
Pistachio
Environment
Fatemeh
Khademi
1
Islamic Azad University, Bandar Abbas Branch, Bandar Abbas, Iran
AUTHOR
Kamyar
Yaghmaeian
2
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
AUTHOR
Mohammad
Taheri
3
Kerman Water and Sewage Company, Kerman, Iran
AUTHOR
Mohammad Ali
Hayatabadi
4
Kerman Water and Sewage Company, Kerman, Iran
AUTHOR
Alireza
Nasiri
nasiri_a62@yahoo.com
5
Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
AUTHOR
https://orcid.org/0000-0002-5001-2523
Mohammad
Malakootian
m.malakootian@yahoo.com
6
Corresponding Author: Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran
AUTHOR
https://orcid.org/ 0000-0002-4051-6242
ORIGINAL_ARTICLE
Assessing some heavy metals pollutions in sediments of the northern Persian Gulf (Bushehr province)
Background: Land and water pollution by heavy metals is a universal issue. Although the pollution affects all countries, but its range and severity vary hugely. The pollution of the marine environment by heavy metals is a worldwide problem. Marine sediments can be sensitive indicators for monitoring contaminants in aquatic environments.
Methods: The concentration of 10 elements (As, Cd, Cr, Cu, Al, Fe, Ni, Pb, Sb, and Zn) was determined in the sediments of four shoreline stations including Imam Hassan port, Ameri port, Bushehr port, and Nayband Bay at the west Persian Gulf from March to December 2017. The elements were measured by
inductively coupled plasma mass spectrometry (ICP-MS). Data were analyzed using SPSS version 16.
Results: The contamination of the sediments was assessed based on the geoaccumulation index (Igeo) and enrichment factor (EF). Spearman correlation matrix was calculated between all the trace metals and major elements as well as corresponding sampling regions. Statistically significant inter-elemental correlations (e.g., Cr-Fe, Cr-Al, Cr-Ni, Cr-Zn, and Cr-Cu) were found between some metals. High EF levels for Fe, Al, and Pb suggest that metals in the sediments of the northern Persian Gulf could have originated from anthropogenic sources.
Conclusion: The contamination pattern of sediments is affected by factors such as sedimentation patterns, physical and chemical properties of the sediments. For example, sediments with fine-grained and high surface area-to-volume ratio can act as good absorbents for many pollutants.
http://ehemj.com/article-1-367-en.pdf
2018-10-09
175
179
10.15171/EHEM.2018.24
Heavy metals
Geologic sediment
Persian Gulf
Bushehr
Mehdi
Bibak
mehdi.bibak65@yahoo.com
1
Corresponding Author: Department of Fisheries, School of Natural Resources, University of Guilan, Sowmehsara, Iran
AUTHOR
https://orcid.org/0000-0003-4476-9260
Masoud
Sattari
msattari647@gmail.com
2
Department of Fisheries, School of Natural Resources, University of Guilan, Sowmehsara, Iran
AUTHOR
https://orcid.org/
Ali
Agharokh
aliagharokh40@gmail.com
3
Research Center for Persian Gulf, School of Persian Gulf, University of Persian Gulf, Bushehr, Iran
AUTHOR
Saeid
Tahmasebi
tahmasebi@pgu.ac.ir
4
Department of Statistics, School of Basic Sciences, University of Persian Gulf, Bushehr, Iran
AUTHOR
Javid
Imanpour Namin
javidiman@guilan.ac.ir
5
Department of Fisheries, School of Natural Resources, University of Guilan, Sowmehsara, Iran
AUTHOR
ORIGINAL_ARTICLE
Evaluation of the presence of coliform in bottled drinking water, released in Sari in 2016
Background: Today, bottled water is used in many countries of the world due to its relatively low cost, better taste, ease of access and low levels of impurities. In unfavorable conditions, the maintenance of microorganisms due to hydrophobicity and adherence to bottles and as a result of increased lipolytic activity can lead to undesirable changes in color, taste and odor, and in cases of more severe load, microbial contamination may cause unhealthy water and flooding. In this study, the presence or absence of coliform in a number of bottled water brands was examined.
Methods: The microbial quality of 10 markers of bottled water present in the market of Sari that was randomly selected from each mark and three samples was examined. The samples were analyzed using the coliform - presence/absence (P-A) test. The results were compared with national standards and the
World Health Organization (WHO) guidelines. Data were analyzed using SPSS version 24 and EXCEL.
Results: Samples showed no microbial contamination Also, coliform and fecal coliforms were not observed in any of the samples. Finally, it was revealed that all cases were in accordance with national standards and WHO guidelines.
Conclusion: Increasing the health indexes of places, food supply and distribution centers, and maintaining health conditions and measures that have been considered especially in the recent years on the health of bottled water, have greatly reduced the problems.
http://ehemj.com/article-1-375-en.pdf
2018-10-21
181
186
10.15171/EHEM.2018.25
Taste
Drinking water
Bacteria
World Health Organization
Bottled water
Zabihollah
Yousefi
zyousefi2004@gmail.com
1
Department of Environmental Health Engineering, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR
https://orcid.org/0000-0001-9251-2668
Alireza
Ala
ala_alireza@yahoo.com
2
Corresponding Author: Student Research Committee, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR
https://orcid.org/0000-0001-9319-2192
Masoumeh
Eslamifar
microbiologist.eslamifar@gmail.com
3
Department of Environmental Health Engineering, School of Public Health, Mazandaran University of Medical Sciences, Sari, Iran
AUTHOR