title

ارزیابی کارایی هاضم هوازی خودگرماده در تثبیت لجن فاضلاب شهری

شکوهی, رضا and رحمانی, علیرضا and عسگری, قربان and درگاهی, عبداله and وزیری, یاسر and عطار عباسی, محمد (1396) ارزیابی کارایی هاضم هوازی خودگرماده در تثبیت لجن فاضلاب شهری. Pakistan journal of biological sciences ــ 20 (5). pp. 260-266. شاپا 1028-8880

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Official URL: http://scialert.net/abstract/?doi=pjbs.2017.260.26...


Title

Evaluation of Autothermal Thermophilic Aerobic Digester Performance for the Stabilization of Municipal Wastewater Sludge

English Abstract

Background and Objective: Sludge stabilization process in terms of operational, environmental and economic indexes is the most important stage of treatment and its disposal. This study was aimed to determine the performance of Autothermal Thermophilic Aerobic Digestion (ATAD) system as one of the low-cost and biocompatible methods of sludge treatment. Materials and Methods: This study has been done using a laboratory scale Autothermal Thermophilic Aerobic Digestion (ATAD). The reactor was consisted of two polyethylene tanks with a final capacity of 100 L for each tank. Both tanks with all fittings were installed on a metal frame. The variables of study were temperature, dissolved oxygen, pH, volatile organic compounds, total solids, COD and the number of Ascaris eggs and fecal coliforms per gram of dry matter of the sludge. The temperature was measured hourly and the pH and dissolved oxygen were measured and controlled twice per day. One-way ANNOVA was applied to analyze reasults. Results: According to the results, the temperature of sludge increased from 11.7-61.2EC by biological reactions. Pathogen organisms were reduced from 80×106 to 503 in number during 72 h. After 6 days pathogen organisms and Ascaris eggs were removed completely. Volatile organic compounds and COD were reduced 42 and 38.3% respectively during the 6 days. Conclusion: It is concluded that the performance of ATAD in removing organic compounds from wastewater sludge were desirable. Resulted sludge from stabilization process were appropriate for use in agriculture as a soil supplement and met the indexes of class A sludge according to EPA’s standards (CFR 40 Part 503).

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :رضا شکوهی
نویسنده :عبداله درگاهی
نویسنده مسئول :محمد عطار عباسی
Additional Information:Indexed in: Pubmed/Medline/Index Medicus, Scopus, Chemical Abstracts, AGRIS , ASCI-Database , CABI ,Cambridge Scientific Abstract , DOAJ, Google Scholar
کلیدواژه ها (انگلیسی):Sludge stabilization, ATAD system, organic compounds, municipal waste water, sludge
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:8955
Deposited By: دکتر عبداله درگاهی
Deposited On:21 Apr 1396 07:58
Last Modified:21 Apr 1396 07:58

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