نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد مهندسی عمران محیط زیست، دانشکده فنی و مهندسی، گروه مهندسی عمران، دانشگاه صنعتی قم، قم، ایران
2 استادیار گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه صنعتی قم، قم، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Industry-related environmental warnings have become increasingly important in recent years, leading to increased investment in environmental protection. Petroleum pollutants such as 4-nitrophenol are one of the inevitable problems faced by oil-rich countries. Therefore, finding a strategy to cheaply remove these pollutants from wastewater is one of the main priorities of the global oil industry and environment. One of the methods used to treat 4-nitrophenol-contaminated wastewater is the use of mobile bed biofilm reactors (MBBRs). The present study tried to investigate the MBBR environment for the treatment of wastewater contaminated with 4-nitrophenol using Bee Cell 2000 media and to determine and report the optimal thermal conditions for this environment.
The microorganisms first adapted to the contaminants and then a biofilm layer formed on the surface of the acne environment in the reactor. This is followed by changes in initial COD concentration (300-3000 mg / L), residence time (8, 12, 24 and 48 hours), temperature (20, 25 ° C) and filling ratio (30, 50 and 70). Percentage) Reactor efficiency was determined and compared. The highest efficiency in 48 hours equal to 98% was observed for the reactor with Bee Cell 2000 acne in 50% filling ratio and in the lowest input COD concentration (400 mg / l). The reactor was able to treat contaminated wastewater with a residence time of 84 hours
4. Nitrophenol was at 20 ° C. Also, by examining the reaction kinetics, it was found that this process follows the second-order modified Stover-Kincannon kinetic model.
کلیدواژه‌ها [English]
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