فهرست مطالب

مجله آب و فاضلاب
پیاپی 37 (بهار 1380)

75 صفحه، بهای روی جلد: 4,000ريال
تاریخ انتشار: 1380/02/15
تعداد عناوین: 12

فارسی
English

انتخاب همه

Bookan Dam Reservoir Quality Simulation

Amin Sarang, Masoud Tajrishy, Ahmad Abrishamchi Page 2

Processes and phenomena of reservoirs deeply effect up and downstream environments. Recently, bad taste and odor have causesed much problems for the people of saqez city in kurdestan. The objective of this paper is to present the results of field investigations of the reserroir water quality. Water quality parameters such as temperature (T), dissolved oxygen concentration (DO), total dissolved solids (TDS), clectrical conductivity (EC), biochemical oxygen demand (BOD), organic-N, total phosphorus, secchi depth and pH were measured for three consecutive months in the summer of 1379 (July, August and September of 2000). The results, with the help of HEC5-Q model, were used to calibrate and validate the daily simulation of water quality parameters for one year.

Abstract View Paper Original: Persian
Biological Treatment of Heavy Metals by Sulfate Reducing Bacteria

A.Farazmand, M.A. Kazemi, A. Gheaisari, H.R. Orumieh Page 16

The aim of this project is to design and construction a new and developed system for treatment of heavy and toxic metals from industrial wastewater, in 1.5 and 500 litter bioreactors. In this project, we studied treatment of the different synthetic and industrial waste effluents in different condition. We will use two sludge blanket bioreactors. One of them in laboratory scale and the other in the pilot plant scale. In the laboratory scale there are some 1.5 litter sludge blanket bioreactor. In the pilot plant, there is a 500 litter bioreactors for treatment of industrial wastewater.We used some chemical reaction for pretreatment of industrial wastewater. These reactions are use for neutralization reduction Cr (VI) ot Cr (III) and hydroxide precipitation of some heavy metals from synthetic and industrial wastewater of some activities, such as electroplating. We used mixed culture of sulfate reducing bacteria (sludge blanket) in the bioreactors for sulfide precipitation of metals such as Pb, Zn, Ni, Cd, Hg. and Cu. This process has several advantages over chemical treatment. This process are simple developed commercially practical because of low operation cost. Chemical process isn’t commercial because of high operation cost and difficulty of treatment arises by generation of metal hydroxid in this process. Therefor, chemical methods aren’t enough efficient for removing of heavy metals from wastewater, because of different pH for precipitation of different hydroxide.

Abstract View Paper Original: Persian
The Efficency of Comparing Different Media Filtration in Water Treatment

A. Torabian, N. Razagi, Professor, H. Kafi Bajestani Page 24

Nowadays dual – media and multi – media filters have been focused attention due to population increase, reduction in water resources, water born diseases and improper function of single medium filters. Unfortunately in Iran only single – medium filters are recommended for water treatment plants.Although the advantages of dual and multi – media filters have been proved but they are still rarely used in water treatment plants throughout the country.In this research, replacement of single – medium filters by dual and multi – media filters has been discussed and the best choice with regard the existing facilities in treatment palnts or in under construction plants has been chosen.For this purpose a comparison between single – medium sand filters, dual – media (sand plus anthracite) and multi – media (sand plus anthracite plus garnet) filters in pilot plant scale with filter No. 22 in Kan water treatment plant (Tehran # 2 water treatment plant) in real scale has been done in November, December 1999 and January 2000. In this research, the turbidity and head loss have been measured every 2 hours day and night in three different surface loads of 6,11 [3], and dual and multimedia filters are predominant over single – medium sand filter and filtrer No. 22 in Kan water treatment plant in all done experiments.

Abstract View Paper Original: Persian
Urbanization Effect on Groundwater Quality of Zahedan Aquifer

Khazaie. Page 31

This paper investigates the impact of urbanization on groundwater quality of Zahedan aquifer which, is the sole source of water supply for Zahedan city. The research is based on the collection of available data, field investigation as well as laboratory analysis of groundwater samples. The investigation reveals that phoshours (as P) concentration of groundwater has increased within the urban area owing to conduction of domestic sewage into the absorbing well. The urbanization effect in some has increased the phosphours form an average of 0.02 mg/l to even 0.1 mg/l. Within the urban area the nitrate concentration has increased much above the admissible level, so that in some places it has reached to about 300 mg/l. The high concentration of ammonium and nitrite in some wells are an indication of recent contamination of groundwater by domestic sewage. This research reveals that owing to poor well design and / or construction, 33% of the groundwater samples are positive for total coliform and 11% of the samples shows faecal contamination. The bacteriological contamination varies with changes of depth of groundwater level. In general it can be said that unplanned growth of urbanization has caused a wide range of pollution of groundwater this situation is a warning to the authority to impose a restricted management for urban development and water resources contamination protection

Abstract View Paper Original: Persian
The Efficiency of Direct Filtration Method for Treatment of Surface Water

M. Sadeghi Page 38

The aim of this suvey is to determin the potential of direct filtration method for surface water treatment and weather the final production meets he drinking water standard. Comparison of results with those obtained by conventional treatment method in view of efficiency and cost effectiveneess.In this study a pilot for direct filter with capacity of 244 L/h was designed. For acur consideration the pilot was built form percy glass material with thicknes of 10 mm. Raw water taken from Zayandeh roud river and experiment period was desingned for one year. Depending to case, samples were taken from different points of filter. The results showed direct filtration method can be used successfuly and quality of final water.

Abstract View Paper Original: Persian
Ellimination or Reduction of Lead, Nickel, Managanese and Colablt ions from Aquatic Systems Using Isfahan Steel Mill Slurry

M.H. Habibi, M.A. Haghighipour, L. Talaei Page 46

The removal of lead, nickel and cobalt ions by sorption on steel slurry has been investigated as a function of metal ion concentration. The adsorption was highest for lead and nickel from solution of 100 mg/l on a kime scle of 0.5h. At an initial Co (II) and Mn(II) conc. Of 100mg/l, up to 70% removal was achierved. The results obtained could be applied for metal – ion removal from industrial wastewater.

Abstract View Paper Original: Persian

علمی مصوب

مجله آب و فاضلاب

Journal of Water & Wastewater

دوماهنامه فنی مهندسی

آخرین شماره | آرشیو

ISSN: 1024-5936 eISSN: 2383-0905

صاحب امتیاز:

مهندسین مشاور طرح و تحقیقات آب و فاضلاب

مدیر مسئول:

مهندس عباس پیراینده

سردبیر:

دکتر احمد ابریشم چی

تلفن نشریه: ۰۳۱-۳۲۶۸۲۴۱۲

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فهرست مطالب

مجله آب و فاضلاب پیاپی 37 (بهار 1380)

مجله آب و فاضلاب

Journal of Water & Wastewater

مجله آب و فاضلاب
پیاپی 37 (بهار 1380)