بررسی حذف رنگ بازی قرمز 18 با استفاده از بیوفیلم تشکیل شده بر بسترگرانول باگاس در راکتور هوازی پیوسته

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار گروه بهداشت محیط، عضو مرکز تحقیقات ارتقای سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی زاهدان، ایران

2 دانشیار، گروه بهداشت محیط، عضو مرکز تحقیقات ارتقای سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی زاهدان، ایران

3 دانشجوی کارشناسی ارشد بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی زاهدان، ایران

4 مربی، گروه بهداشت محیط، عضو مرکز تحقیقات ارتقای سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی زاهدان، ایران

چکیده

رنگ‌ها یکی از مهم‌ترین آلاینده‌های موجود در فاضلاب صنایع نساجی بوده و غالباً سمی، سرطان زا، جهش‌زا و غیر قابل تجزیه بیولوژیک هستند. این مطالعه با هدف بررسی کارایی حذف رنگ بازی قرمز 18 با استفاده از بیوفیلم تشکیل شده بر بستر گرانول باگاس در راکتور هوازی پیوسته انجام پذیرفت. این مطالعه از نوع تجربی- آزمایشگاهی بود که اثر متغیرهای غلظت رنگ (200 تا 30 میلی‌گرم در لیتر)، زمان ماند هیدرولیکی (8 تا 2 ساعت)، غلظتBOD  100 تا 200 میلی‌گرم در لیتر بر کارایی حذف رنگ بازی قرمز 18 و همچنین ضرایب سینتیکی در راکتور هوازی بررسی شد. نتایج نشان داد که حداکثر کارایی حذف رنگ در غلظت اولیه 30 میلی‌گرم در لیتر برابر 90 درصد در زمان ماند هیدرولیکی 8 ساعت بود که در BOD ورودی 200 میلی‌گرم در لیتر کارایی حذف رنگ برابر 86 درصد به‌دست آمد. ضریب حداکثر سرعت مصرف سوبسترا (K) در بار آلی BOD مساوی 100 و 200 میلی‌گرم در لیتر به‌ترتیب 23/0 و 41/1، ثابت نیم سرعت واکنش (Ks) در بار آلی BOD مساوی 100 و 200 میلی‌گرم در لیتر به‌ترتیب برابر 85/44 و 39/19 به‌دست آمد. همچنین ضرایب خودتخریبی (Kd) در BOD ورودی مساوی 100 و 200 میلی‌گرم در لیتر به‌ترتیب برابر 35/0، 5/0 و ضریب حداکثر سرعت ویژه رشد توده زیستی (mµ) به‌ترتیب برابر 36/83 و 37/4 محاسبه شد. نتایج این مطالعه نشان داد که بیوفیلم تشکیل شده بر بستر گرانول باگاس در راکتور هوازی پیوسته، کارایی خوبی در حذف رنگ بازی قرمز 18 دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Survey of Basic Red 18 Dye Removal Using Biofilm Formed on Granular Bagass in Continuous Aerobic Reactor

نویسندگان [English]

  • Ferdos Kord Mostafapour 1
  • Edris Bazrafshan 2
  • Ameneh Eskandari- Tarbaghan 3
  • Hamideh Akbari 4
1 Assoc. Prof. of Environmental Health, Member of Health Promotion Research Center, Faculty of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran
2 Assoc. Prof. of Environmental Health, Member of Health Promotion Research Center, Faculty of Public Health, Zahedan University of Medical Sceinces, Zahedan, Iran
3 MSc Student of Environmental Health, Faculty of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran
4 Instructor of Environmental Health, Member of Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
چکیده [English]

Dyes comprising a major pollutant in the effluent from textile plants are mostly toxic, carcinogenic, mutagenic, and non-biodegradable. This experimental-laboratory study was carried out using a biofilm formed on a granular bagass bed in a continuous aerobic reactor to investigate the kinetic coefficients of the aerobic reactor as well as the effects of color concentration (30-200 mg/l), hydraulic retention time (2-8 h), and BOD concentration (200-100 mg /l) on the removal of Basic Red (18) from textile effluents. The results revealed a maximum removal efficiency of 90% for an initial color concentration of 30 mg/l and a hydraulic retention time of 8 hours. A color removal efficiency of 86% was recorded for an influent BOD concentration of 200 mg/l. Also, maximum substrate utilization rate (K) for organic loadings of 100 and 200 mg/L were 0.23 and 1.41 while the half velocity constant values were 44.85 and 19.39, respectively. Moreover, for the same organic loadings, the values of 0.35 and 0.5 were recorded for decay coefficient (Kd) and 37.36, 4.83 for maximum specific growth rate coefficient (μm), respectively. Based on the findings of this study, it may be claimed that the biofilm formed on a granular bagass bed in a continuous aerobic reactor has a good Basic Red (18) removal efficiency.

کلیدواژه‌ها [English]

  • Basic Red 18 Dey
  • Biofilm
  • Bagsse
  • Aerobic Reactor
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