Septic tank effluent wastewater treatment with an aerobicsubmerged fixed-bed bioreactor for groundwater recharge
محل انتشار: سیزدهمین کنگره بین المللی مهندسی عمران
سال انتشار: 1402
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 55
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شناسه ملی سند علمی:
ICCE13_275
تاریخ نمایه سازی: 23 آذر 1402
چکیده مقاله:
The wastewater used in this study enters the reactor after pretreatment via a septic tanksystem. The bioreactor used in this study had a useful volume of ۲۱۰۰ liters. Novel mediaconsisting of ۷۲ woolen strings and ۱۲ sheets of curtain-style media with total surface areasof ۲۹۱۸ and ۱۹۵۰۰ m۲ were used as biofilm formation surfaces. The system was first set todetermine chemical oxygen demand (COD) removal for retention times of ۱۰, ۸, ۶, and ۴hours; then, the optimal hydraulic retention time was determined. COD removal was ۹۵.۷%,۹۲.۹%, ۸۸.۸%, and ۶۵.۴% for ten, eight, six, and four-hour HRTs, respectively. Thehydraulic retention time of ۶ hours was selected as the optimal HRT time since it iseconomical to operate and maintain, and its efficiency in removing COD that can meet thestandard of the Iranian Department of Environment for groundwater recharge. These resultsindicate that the utilized media were reliable and could remove organic matters satisfactorilyto meet the standard. Compared to other conventional treatment methods like activatedsludge and MBR, which use more complicated installation and technology, maintenance andinstallation procedures were easier.
کلیدواژه ها:
نویسندگان
Ali Tavallali
Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Ayoub Karimi-Jashni
Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran