عوامل مؤثر بر گرانوله شدن لجن در شرایط هوازی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران

2 استاد، دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران

چکیده

فناوری لجن گرانوله یکی از دستاورهای مهم بیوتکنولوژی محیط ‌زیستی در تصفیه فاضلاب و شامل گرانوله شدن هوازی و بی‌هوازی است. تاکنون مطالعات بسیاری بر روی جوانب مختلف گرانوله شدن بی‌هوازی و تشکیل و بهره‌برداری آن صورت گرفته و فرایند آن تا حد زیادی شناخته شده است. شناخت فرایند لجن گرانوله هوازی محدود به چند سال اخیر است که تحقیقاتی نیز در این مورد به شکل پراکنده بر روی عواملی مانند منبع آلی، نیروهای تنش هیدرولیکی، چرخه زمانی، زمان ته‌نشینی، ساختار راکتور، زمان ماند توده سلولی، اکسیژن محلول، غلظت یون فلزات و pH انجام شده است. در این مقاله تلاش شد که نتایج این تحقیقات به‌طور مختصر بیان و با بررسی و مقایسه آنها، مؤثرترین تحقیق مشخص شود. همچنین برای درک درست‌تر از فرایند گرانوله شدن، به مقایسه لجن گرانوله هوازی و غیر هوازی پرداخته شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

A Survey on Sludge Granulation under Aerobic Conditions

نویسندگان [English]

  • Sajjad Jalali 1
  • jalal Shyegan 2
  • Samira Reza soltani 1
چکیده [English]

The sludge biogranulation technology, including the two aerobic and anaerobic processes, is an important development in the field of wastewater treatment. Much is know about the process and operation of the anaerobic granulation thanks to the rather large number of studies carried out. Aerobic granulation, however, has been only recently investigated and a limited number of studies have been dedicated to such aspects of the process as the organic source, hydrodynamic shear stress, cycle, settling time, reactor configuration, solid retention time, oxygen concentration, metallic concentration, and pH. This article tries to provide a brief review of these studies and the results obtained in an attempt to identify the most important study so far conducted. Using the results, a comparison will also be made between the anaerobic and aerobic granulation processes to gain a better understanding of both.

کلیدواژه‌ها [English]

  • Sludge Aerobic Granulaion
  • SBR Reactor
  • Factors Involved in Aerobic Granulation

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