بهينه‌سازي رآكتور بيوفيلمي MBSBR براي كنترل نسبت غذا به ميكروارگانيسم و شوك آلي وارده به سيستم با تأكيد بر حذف LAS از فاضلاب صنايع شوينده

در ﻣﯿﺎن روش ﻫﺎي ﻣﺨﺘﻠﻒ ﺗﺼﻔﯿﻪ، اﺳﺘﻔﺎده از ﻓﻦ آوري ﻫﺎي ﻣﺮﺗﺒﻂ ﺑﺎ ﻓﺮآﯾﻨﺪﻫﺎي ﺑﯿﻮﻟﻮژﯾﮑﯽ از ﺟﻤﻠﻪ ﺳﯿﺴﺘﻢ ﻫﺎي ﺑﯿﻮﻓﯿﻠﻤﯽ داراي اﻫﻤﯿﺖ وﯾﮋه اي ﻣﯽ ﺑﺎﺷﺪ. اﯾﻦ ﺗﺤﻘﯿﻖ ﺟﻬﺖ ﺑﻬﯿﻨﻪ ﺳﺎزي رآﮐﺘﻮر ﺑﯿﻮﻓﯿﻠﻤﯽ Moving bed sequenced batch reactor) MBSBR ) در ﮐﻨﺘﺮل ﻧﺴﺒﺖ F/M و ﺷﻮك آﻟﯽ وارده ﺑﻪ ﺳﯿﺴﺘﻢ ﺑﺎ ﺗﺄﮐﯿﺪ ﺑﺮ ﺣﺬف Linear alkylbenzen sulfonate) LAS ) از ﻓﺎﺿﻼب ﺻﻨﺎﯾﻊ ﺷﻮﯾﻨﺪه اﻧﺠﺎم ﺷﺪ. مواد و روش‌ها: در اين بررسي از يك پايلوت پلكسي‌گلاس شفاف با حجم كلي 35 ليتر و حجم مفيد 30 ليتر استفاده و در 3% پرشدگي مديا (60، 50، 40%) راهبري گرديد. بار آلي ورودي به سيستم به ميزان 1000 mg/L و متغيرهاي LAS به مقادير 250 mg/L، 200، 100 بود. نتايج: نتايج حاصله از تحقيق حاكي از قابليت بالاي سيستم MBSBR در تصفيه فاضلاب صنايع شوينده بوده و حداكثر ميزان راندمان به‌دست آمده از بار آلي و LAS در زﻣﺎن ﻣﺎﻧﺪ ﻫﯿﺪروﻟﯿﮑﯽ 2/5 ﺳﺎﻋﺖ ﺑﺎ ﺑﺎر آﻟﯽ ورودي ﺑﻪ ﺳﯿﺴﺘﻢ ﺑﻪ ﻣﯿﺰان 1000 mg/L و LAS ﺑﻪ ﻣﯿﺰان ورودي 100 mg/L )ﺑﺮاي COD: Chemical Oxygen Demand ( و 200 mg/L )ﺑﺮاي LAS ( در ﻧﺮخ ﭘﺮﺷﺪﮔﯽ 50% ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﻪ ﻣﻘﺪار 90/3 و 99/71 درﺻﺪ ﺑﻪ دﺳﺖ آﻣﺪ. در ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﻣﺤﺪوده ي ﻧﺴﺒﺖ F/M در 50% ﭘﺮﺷﺪﮔﯽ ﻣﺪﯾﺎ در ﻣﺤﺪوده ي )0/03-0/1( ﺑﻪ دﺳﺖ آﻣﺪ. ﻫﻤﭽﻨﯿﻦ راﻧﺪﻣﺎن ﺣﺬف LAS ﺑﺎ اﻋﻤﺎل ﺷﻮك ﮐﯿﻔﯽ در دو ﻣﻘﺪار 1500 mg/L و 2000 ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﻪ ﻣﻘﺎدﯾﺮ 98/12 و 96/42 درﺻﺪ رﺳﯿﺪ ﮐﻪ ﺣﺎﮐﯽ از ﺷﻮك ﭘﺬﯾﺮ ﺑﻮدن ﺳﯿﺴﺘﻢ ﺑﯿﻮﻓﯿﻠﻤﯽ MBSBR ﻣﯽ ﺑﺎﺷﺪ. ﻧﺘﯿﺠﻪ ﮔﯿﺮي: ﻧﺘﺎﯾﺞ اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﻧﺸﺎن دﻫﻨﺪه ﺗﻮاﻧﺎﯾﯽ ﺑﺎﻻي راﮐﺘﻮر MBSBR ﺑﺮاي ﺣﺬف LAS از ﻓﺎﺿﻼب ﺑﺎ اﻋﻤﺎل ﺷﻮك ﻫﺎي ﻣﺘﻔﺎوت اﺳﺖ ﮐﻪ ﻣﯽ ﺗﻮان از آن ﺑﻪ ﻋﻨﻮان ﯾﮏ ﺳﯿﺴﺘﻢ ﺑﯿﻮﻟﻮژﯾﮑﯽ ﻣﺆﺛﺮ در ﻓﺮآﯾﻨﺪﻫﺎي ﺗﺼﻔﯿﻪ اﺳﺘﻔﺎده ﻧﻤﻮد.

Among the various treatment methods, the use of technologies related to biological processes such as biofilm systems is very important. The aim of this study was to optimization of MBSBR bioreactor for control of F/M Ratio and system's organic shock with an emphasis on LAS removal from detergent industries wastewater. Methods: A plexy glass made reactor with totally 35 L volume (useful volume of 30 L) has been used and operated in three media filling rate (40, 50 and 60%). System organic loading rate and LAS were 1000 mg/L for COD and 100, 200 and 250 mg/L for LAS. Results: The results indicated that MBSBR has high ability in treatment of detergent industries wastewater. So that the maximum removal efficiency of organic load and LAS in the hydraulic retention time of 2.5 hours with organic loading rate of 1000 mg/L and LAS rate of 100 mg/L (for COD) and 200 mg/L (for LAS) in the media filling rate of fifty percent were 90.3 and 99.71%, respectively. In optimal conditions, F/M ratio obtained in media filling rate of 50% was in the range of 0.03-0.1 day-1. Also LAS removal efficiency obtained at organic shocks of 1500 and 2000 mg/L were 98.12 and 96.42, respectively which means MBSBR have high ability to control it. Conclusion: The results showed the high ability of MBSBR biofilm reactor for LAS removal at different F/M ratio and system organic shocks so it can be used as effective biological treatment system.