Editorial
text
article
2017
per
Editorial
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
2
2
https://www.jwwse.ir/article_58401_97651d343eafda56a3893a4b3529e62e.pdf
Studying Iranian Drinking Water Quality Guidelines Compared to the Authentic World Standards
Shervin
Shahvi
Shervin Shahvi
Post Doctroral Research Fellowship
Faculty of Environemntal
University of Tehran
author
Ali
Torabian
Full professor/ Department of Environmental/ University of Tehran
author
text
article
2017
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Referring the World health Organization definition, a safe drinking water should not threat the consumer health over the lifetime of consumption. The objective of the present study is to investigate the present guidelines in order to improve the Iran drinking water guidelines. To obtain this, the present drinking water guidelines in Iran (named 1053 and 1011 standards) and some well-known guideline (WHO,US EPA and the European Communities) were studied. The Iran guidelines were compared to the other ones and the different points and values were presented as Tables. It was understood that the present drinking water guidelines of Iran do not cover areas such as the water quality indicators based on their resources and lack some suggestions about in-network monitoring plans. It is recommended that Iran guidelines should be revised in two categories: 1. The primary standard including the pollutants threatening the consumers health and the Secondary standards which should be prepared by the local water authorities. Keywords: Drinking water, drinking water standards, water quality indicators, World Health Organization, Iran drinking water standards
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
3
13
https://www.jwwse.ir/article_58402_7683c0d11ae0946b38d0f3bdbb711e97.pdf
dx.doi.org/10.22112/jwwse.2018.87953.1008
Inves tigating and Proposing a Proper Treatment Sys tem for Washing Machine Was tewater
Mohammad
Sarrafzadeh
University of Tehran
author
narges
shirouei
energy and environmental, faculty of engineering, university of Tehran, Tehran, Iran
author
omid
tavakoli
Energy and Environmental, faculty of engineering, university of Tehran, Tehran, Iran
author
text
article
2017
per
Purification and recycling of greywater, to make unconventional source, is considered as an appropriate solution for increasing fresh water demand and dealing with water crisis. In this study, physico-chemical treatment system (coagulation, flocculation and sedimentation) was used for treating and recycling of washing machine greywater. At the beginning, to determine appropriate type and concentration of coagulants, jar test was performed using four coagulants including, aluminum sulfate, Iron(II) sulfate, Iron(III) sulfate and Iron(III) chloride in concentration range of 5-135 milligram per liter (according to aluminum or iron concentration) . Jar test results shows that aluminum sulfate with lowest dose in comparison with other coagulants (348/7 milligram per liter according to aluminum sulfate concentration) has best efficiency in turbidity removal (98/5 percent). To evaluate the efficiency of treatment system, parameters such as pH, total dissolved solids, total suspended solids, electrical conductivity, turbidity, nitrate, nitrite, ammonia, phosphate, anionic surfactant and chemical oxygen demand (COD) were measured for both untreated and treated water. Removal of turbidity, suspended solids, nitrite, nitrate, phosphate, anionic surfactant and chemical oxygen demand (COD), respectively, reach to an acceptable level of 98/4, 95, 83/5, 75, 91/3, 67 and 69 percent. Also coagulation reduces pH only 21 percent. It should be noted that the removal of ammonia, electrical conductivity and TDS in this study was negligible.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
14
23
https://www.jwwse.ir/article_58403_0c6ce941e9bb2c952674dfd4b1e49a4c.pdf
dx.doi.org/10.22112/jwwse.2018.87676.1009
Biological Removal of Nitrate from Drinking Water in Anoxic Bioreactor – Membrane Bioreactor Hybrid System
Faeze
Yadegari
Department of Energy, Materials and Energy Research Center, Meshkin Dasht, Karaj, Iran
author
Elham
Abdollahzadeh Sharghi
Environmental Group, Department of Energy, Materials and Energy Research Center, Meshkin Dasht, Karaj, Iran
author
Merdad
Adl
Conversion and Energy Storage Group, Department of Energy, Materials and Energy Research Center, Meshkin Dasht, Karaj, Iran
author
text
article
2017
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The main aim of the present study was evaluating the performance of a biological hybrid system comprising anoxic bioreactor and aerobic membrane bioreactor (MBR) with immersed micro-filter membrane for the nitrate removal from drinking water during 34 days of operation. Operational conditions were constant hydraulic retention time equal to 17 h and 36 h for anoxic bioreactor and MBR, respectively, influent nitrate-N concentration of 33.9 mg NO3-N/L, and C/N ratio equal to 2. The results demonstrated that nitrate removal efficiency in anoxic bioreactor was in the range of 73-97%. The effluent nitrite-N concentration from the hybrid system was in the range of 0.01-0.02 mg NO2-N/L. Both nitrate and nitrite concentrations in the effluent of system were always below the the World Health Organization (WHO) limit. The effluent chemical oxygen demand (COD) of the hybrid system was always less than 15 mg/L and COD removal efficiency of the system was 92.8±0.1 %. The effluent turbidity was also less than 2 NTU that represented membrane efficacy in preventing microbial mixture washout. The results of this research show that hybrid biological system of anoxic bioreactor-MBR has a very good potential for removing nitrate from drinking water.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
24
33
https://www.jwwse.ir/article_58404_68cc71bee82a45b40e477b2db2cd77fb.pdf
dx.doi.org/10.22112/jwwse.2018.87972.1010
Controlling the Negative Pressure Caused by Water Hammer in Water Conveyance Pipe Lines Using Hydropneumatics Tank and Air Valves (A Case Study of Mehran City, Ilam Province)
Asrin
Bahrami
Water Engineering Department,Agriculture Faculty,Ilam University,Ilam,Iran
author
jafar
mamizadeh
water structure department, agriculture faculty, ilam university,Ilam,IRAN
author
alireza
hosseini
water structure department, agriculture faculty, ilam university,Ilam,IRAN
author
hamidreza
lotfizadeh
civil faculty, ilam Islamic azad university
author
text
article
2017
per
Whenever and for any reason the velocity of the fluid ceases in the transfer line or water distribution networks, pressure waves will form in the pipe lines, which can produce a pressure several times more than a pressure pump’s output and lead to a great deal of tension on network’s components, which in turn will cause the water hammer phenomenon. Today, in every water transfer project, a detailed study on the water hammer phenomenon is essential, so that with a full recognition of this process’s adverse effects, the adequate measures would be taken to deal with it.This study uses Water Hammer V8i software to analyze the water hammer of Mehran city’s border terminal water conveyance pipe. The study was executed in 3 phases of simulation with protective equipment, without the protective equipment and with consultant’s recommended equipment. The results indicate that in the phase without the protective equipment, a great deal of negative pressure builds up along the water conveyance pipe line that needs to be controlled. In the next step, various combinations of Hydropneumatic tank and air valves were suggested. The results of several simulations showed that a 2 square meter Hydropneumatic tank and 3 fifty millimeter air valves will be capable of controlling the negative pressure along the pipe line.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
34
40
https://www.jwwse.ir/article_58405_72e9e8239dc9f3cc9a61124f698afa6d.pdf
dx.doi.org/10.22112/jwwse.2018.88848.1014
Using Technical and Financial Review and AHP Method to Find the Best Method of the Chlorine-Based Disinfection
ebrahim
aboutalebi shakour
mechanical engineer in toossab consulting engineers
author
hosein
jamshidi
Project Manager.
author
text
article
2017
per
In this paper, research on six chlorine-based methods, which is one of the most widely used and effective methods of disinfection, is carried out, the advantages and disadvantages and their comparisons have been investigated.Also provided by Excel, computational software, Which will detail the cost of disinfection in stages for up to five years.The goal is to reach the best of the economic and technical landscape Which is a concern of many consultants and operators.In order to achieve this, nine criteria must be valued, by collecting questionnaires and collecting 34 questionnaires from experts in water, water supply and disinfection systems,Obtain important decision criteriaAnd by way of comparison with the help of software AHP and Expert choice .In order of preference by electrolysis of sodium chloride (Multi-oxidant), bleach(Sodium hypochlorite as a disinfectant) and hypochlorinator (Calcium hypochlorite) as best practices from the six of the most effective methods that are chlorine-based disinfection methods achieved.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
41
47
https://www.jwwse.ir/article_58406_b4612b6a052eb08581d301d78f2c66f5.pdf
dx.doi.org/10.22112/jwwse.2018.88015.1015
Using and Development of Regression Models for Predicting Pipes Failure Rate in Water Distribution Networks
Homayoun
Motiee
Water and Wastewater Dept., Civil Engineering water and Environment Faculty, University of Sh. Beheshti
author
Sonay
Ghasem Najad
Msc. Graduated,‍Civil, Water and Environment Faculty - Shahid Beheshti University
author
text
article
2017
per
Pipes failure events in the water distribution networks provide leakage of water. Failures cause the loss of significant fresh water and investments losses. The most important parameters are: material, age, length, diameter and hydraulic pressure. In this paper four statistical methods have used for analyzing pipe incidents, with the goal of estimation of failure probability in future, with finding the most influences parameters in the incidents. The statistical regression models using in this research are linear regression model, exponential regression model, Poisson regression model , and Logistic regression model . For evaluation of the models, the data of a pilot in the first district of the Tehran’s Water and Wastewater Company with more than 48500 consumers, total pipe length of 582702 meter, different materials and diameters were used. The results demonstrated that the logistic model has a better performance than others to predict the future events with a higher probability.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
48
58
https://www.jwwse.ir/article_58407_cfd3a7369d8b1f4d3ad71277248a4ab4.pdf
dx.doi.org/10.22112/jwwse.2017.89374.1024
Experience
text
article
2017
per
One of necessary systems for today’s organizations is “knowledge management”. Acquiring tacit knowledge of organization’s experts and converting it to explicit knowledge, which is more capable and easier to be shared compared to tacit knowledge, is one of the most important procedures in knowledge management. In this paper, sample experiences regarding sickness of 4000 habitant in Pardis city because of water quality crises and activities to identify and troubleshooting of the problem has been described. This article can be useful for managers and experts in exploitation of water and waste water especially those at field of water and waste water quality and hygiene.
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
59
61
https://www.jwwse.ir/article_58408_6b5a879cc039ac5c05c3405837863673.pdf
Interview
text
article
2017
per
Interview
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
62
70
https://www.jwwse.ir/article_58409_3101eb10e1426e8ac07dde2cf58c5b8f.pdf
Idea Recall
text
article
2017
per
Idea Recall
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
70
70
https://www.jwwse.ir/article_58410_0777200f3e49f8fd92052dc734488597.pdf
Best Technology
text
article
2017
per
Best Technology
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
71
74
https://www.jwwse.ir/article_58411_08118ac6ebca2e3e6aaa334611a0d3cb.pdf
Book Introduction-jwwse
text
article
2017
per
Book Introduction-jwwse
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
75
75
https://www.jwwse.ir/article_58414_c099daf1b71d8f2618145fc368096ff8.pdf
Best Thesis-jwwse
text
article
2017
per
Best Thesis-jwwse
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
76
77
https://www.jwwse.ir/article_58412_740ddef67d0e4142ca7efa9d76b2a7de.pdf
IWWA General News
text
article
2017
per
IWWA General News
Journal of Water and Wastewater Science and Engineering
انجمن آب و فاضلاب ایران
2588-3941
2
v.
2
no.
2017
78
86
https://www.jwwse.ir/article_58413_8a48a632c1c12258bbe762d46b03d7f6.pdf