7467

6973

كارشناسي ارشد

محيط زيست

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1391

نه، 74ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

امير تائبي

هستي هاشمي زاده

1/11/91

بيژن بينا، شهناز بمانيان

1396/09/22

كتابنامه

عمران

مهندسي عمران

ID6973

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Investigation of ASM in anticipation of dairy industry Wastewater treatment in SBR Mohammad Reza Khaksar mr khaksar@cv iut ac ir 22 October 2012 Department of Civil Engineering Isfahan University of technology Isfahan 84156 83111 Iran Degree M Sc language Farsi Dr Amir Taebi amirth@cc iut ac ir Abstract According to FAO world milk production has raised to 695 MT in 2009 this report indicates that Iran s participation with five percent annual growth was 1 2 of world milk production Dairy plant wastewater categorized as wastewaters with high organic load The organic load varies according to season and production Regarding to high organic load and biodegradability of dairy plant wastewater it is necessary to exist the ability of biological wastewater treatment in the Diary industries wastewater treatment plant facilities Sequencing batch reactor SBR is one of the biological wastewater treatment processes In SBR biological wastewater treatment operates in sequence of time In other words first reactor is filled with influent next mixing and aeration are performed and finally effluent is decanted from reactor after settlement Nowadays due to strict regulatory circumstances for quality indexes of wastewater treatment plants effluent existence treatment plants improvement and more precise design for new plants is required Modeling is a useful tool for existence wastewater treatment plants improvement and accurate design of new wastewater treatment plants ASM model is related to modeling Activated Sludge process biochemical reactions and So far no official model has proposed for aerobic biological treatment in SBR Therefor in this study according to literatures modification of ASM model for SBR biochemical reactions was performed A laboratory scale reactor was made for validation of modified model This reactor was inoculated with activated sludge taken from an aeration tank from Isfahan pegah dairy industry wastewater treatment plant The reactor shape was cylinder with 50cm height and 20cm diameter The reactor was operated with sludge age of 5 d 4 liter volume a mixed liquor suspended solids MLSS concentration 1250 mg L and sludge volume index SVI 100 ml g 1 The reactor was fed with synthetic diary wastewater SDW The synthetic wastewater was prepared by solving industrial milk powder in distillated water The biochemical model is composed from mathematical expressions of biochemical process rate and stoichiometry coefficients of biochemical process So a computer program is required for using a biochemical model In this thesis AQUASIM was used as a software environment First step in model validation is model calibration The model was calibrated using respirometry experiments and AQUASIM next total COD change in the laboratory scale reactor was measured and the model was run with initial conditions of laboratory scale reactor then the total COD change in the laboratory scale was modeled with calibrated model in AQUASIM For model validation relation between modeling results and measured results was compared with correlation factor The correlation factor between experimental and modeling results was 0 969 Key Words SBR biological treatment modeling aerobic treatment parameter estimation respirometry

امير تائبي

هستي هاشمي زاده

بيژن بينا، شهناز بمانيان