title

مقایسه کارایی سیستم های طبیعی(برکه تثبیت و نیزار مصنوعی) و مکانیکی (لجن فعال) تصفیه فاضلاب در حذف کیست تک یاخته و تخم انگل

شرفی, کیومرث and فضل زاده دویل, مهدی and پیرصاحب, مقداد and درایت, جمشید and حضرتی, صادق (1391) مقایسه کارایی سیستم های طبیعی(برکه تثبیت و نیزار مصنوعی) و مکانیکی (لجن فعال) تصفیه فاضلاب در حذف کیست تک یاخته و تخم انگل. Ecological Engineering ــ 44 . pp. 244-248. شاپا 0925-8574

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Title

The Comparison of parasite eggs and protozoan cysts of urban raw wastewater and efficiency of various wastewater treatment systems to remove them

English Abstract

One of the most important quality characteristics associated with wastewater reuse in agriculture is the microbial quality. This study aimed to determine the efficiencies of Ghasreshirin (constructed wetland), Islamabadgharb and Gilangharb wastewater treatment plants (stabilization ponds), Sarpolezahab and Paveh (extended aeration activated sludge) and Kermanshah (conventional activated sludge) in the removal of protozoan cysts and parasitic eggs. This study was carried out during six months and samples were collected at weekly intervals from influent and effluent of the wastewater plants. In order to determine the concentration of ova, 288 samples were analyzed by Mc Master Slide according to Bailenger method. No parasite eggs or protozoan cysts were detected in the effluents of the constructed wetland or stabilization ponds systems. The extended aeration activated sludge system of Sarpolezahab removed 99-100% of parasite eggs and ≥99% of protozoan cysts. The respective values for extended aeration activated sludge system of Paveh were 97.5-100% and ≥99%. However, the conventional activated sludge of Kermanshah removed 97-99% and 99-100% of parasite eggs and protozoan cysts, respectively. According to the results, removal efficiency for cysts and parasite eggs in natural systems (constructed wetland and stabilization ponds) is better than mechanical systems (extended aeration activated sludge and conventional activated sludge). The effluent quality of all systems in terms of nematode eggs is consisted to Engelberg index (nematode eggs count: 1 ≥ counts per liter).

Item Type:Article
زبان سند : انگلیسی
نویسنده :کیومرث شرفی
نویسنده :مهدی فضل زاده دویل
نویسنده مسئول :مقداد پیرصاحب
نویسنده :جمشید درایت
نویسنده :صادق حضرتی
Additional Information: Impact Factor: 3.106 Abstracting and Indexing: 1- Science Citation Index 2- Scopus, Biological Abstracts Biosis Previews 3- Cambridge Scientific Abstracts, Current Contents/Agriculture, Biology & Environmental Sciences Elsevier BIOBASE , GEOBASE, Urban Studies Abstracts
Uncontrolled Keywords:لجن فعال، برکه تثبیت، نیزار مصنوعی، کیست تک یاخته، تخم انگل
کلیدواژه ها (انگلیسی):Activated sludge, Stabilization ponds, Constructed wetland, Protozoan cyst, and parasitic egg.
Subjects:WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions:Faculty of Health > Department of Environmental health
ID Code:3358
Deposited By: MR Mahdi Fazlzadeh
Deposited On:01 May 1391 08:29
Last Modified:31 Jan 1393 09:54

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