پديد آورنده :
قسمتي، سعيد
عنوان :
تصفيه پساب كارخانه توليد خمير مايه نانوايي به وسيله بيوراكتور غشايي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
فرايند جداسازي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
سيزده، 103ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
مرتضي صادقي
استاد مشاور :
كيخسرو كريمي
توصيفگر ها :
غشاي الياف توخالي , گرفتگي غشا
تاريخ نمايه سازي :
8/12/90
استاد داور :
محمدرضا احساني، اكرم زماني
تاريخ ورود اطلاعات :
1396/10/12
رشته تحصيلي :
مهندسي شيمي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Treatment of Baker s Yeast Factory Wastewater by Membrane Bioreactor Saeed Ghesmati saeed ghesmati@yahoo com Date of Submission 15 October 2011 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Morteza Sadeghi m sadeghi@cc iut ac irAbstractBakery yeast is a valuable material for the production of bread which increases food value flavor andvolume of beard One of the most problems in the production of bakery yeast is ouput wastewater from themanufacturing unit which releases much pollution to the environment Membrane bioreactor MBR technology is one of the newest methods in municipal and industrial wastewater treatment and generallyreplaces the conventional treatment methods This technology is a combination of the biological process andmembrane separation process which is used commercially and industrially in advanced and developingcountries Advantages of MBR technology are the high quality of the output stream less required space quick installation and so on The objective of this research is evaluation of treatment of bakery yeast factorywastewater by membrane bioreactor technology Experimental setup was designed and constructed accordingto various studies in the field of industrial wastewater treatment Hollow fiber membrane modules of dead end immersed type with pore size of 0 26 m was used in bioreactor In the biological process Aspergillusoryzae microorganism was prepared and inoculated for biochemical reactions This microorganism wasadapted with wastewater in the bioreactor for two weeks After microorganisms being adapted the physicaland chemical tests such as chemical oxygen demand COD biochemical oxygen demand 5 days BOD5 and suspended solids of concentrations and turbidity were measuring in the feed inlet and permeate ofmembrane during the operation Mixed liquor suspended solids concentration was in the range of 4100 to9100 mg L in membrane bioreactor system The theoretical hydraulic retention time of 22 h was consideredin this research Membrane critical flux was obtained 6 7 L m2 h by Flux Step method which based onoperation flux was considered 5 L m2 h in membrane bioreactor By calculating three types of affectingresistance on membrane performance using permeate flux and trans membrane pressure which basis of thesevalues the total membrane resistance was obtained 8 333 1012 m 1 In this research the average organicloading rate of 4 2 kg COD m3 d was enter to the bioreactor and outlet COD and BOD5 were reduced to 488and 70 mg L respectively during operating time of 45 days The highest COD and BOD5 removal efficiencyin the MBR process were obtained 82 2 and 88 0 respectively This method of wastewater treatmentreduced the turbidity from between 134 and 282 NTU in feed to less than 2 5 NTU in permeate stream Permeate pump was operated with a mode of 5 5 min on and 30 sec off during the operation in order toreduce the fouling rate in membrane module The membrane was washed by distilled water to remove thefouling and permeate flux recovery In the case of excessive fouling the sodium hypochlorite solution wasused for washing Keywords membrane bioreactor bakery yeast wastewater treatment hollow fiber membrane membrane fouling
استاد راهنما :
مرتضي صادقي
استاد مشاور :
كيخسرو كريمي
استاد داور :
محمدرضا احساني، اكرم زماني
