کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9951504 1701044 2018 37 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comprehensive laboratory assessment of the effects of sewer-dosed iron salts on wastewater treatment processes
ترجمه فارسی عنوان
یک ارزیابی جامع آزمایشگاهی در مورد اثرات نمک های فاضلاب فاضلاب در فاضلاب
کلمات کلیدی
دوز آهن نمک، سیستم آب شهری یکپارچه، شبکه فاضلاب، توالی راکتور بتنی، هضم بی هوازی آبگیری
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
The effect of iron-dosing in the sewer system, on wastewater treatment processes, was investigated using laboratory-scale wastewater systems comprising sewers, wastewater treatment reactors, sludge thickeners, and anaerobic sludge digesters. Two systems, fed with real domestic wastewater, were operated for over a year. The experimental system received ferric chloride (FeCl3) dosing at 10 mgFe L−1 in the sewer reactor whereas the control system received none. Wastewater, sludge and biogas were extensively sampled, and analysed for relevant parameters. The FeCl3-dosed experimental system displayed a decreased sulfide concentration (by 4.3 ± 0.5 mgS L−1) in sewer effluent, decreased phosphate concentration (by 4.7 ± 0.5 mgP L−1) in biological treatment reactor effluent, and decreased hydrogen sulfide concentration in biogas (911.5 ± 189.9 ppm to 130.0 ± 5.9 ppm), as compared with the control system. The biological nitrogen removal performance of the treatment reactor, and biogas production in the anaerobic digester were not affected by FeCl3-dosing. Furthermore, the dewaterability of the anaerobically digested sludge was enhanced by 17.7 ± 1.0%. These findings demonstrate that iron-dosing to sewers can achieve multiple benefits including sulfide removal in sewers, phosphorus removal during wastewater treatment, and hydrogen sulfide (H2S) removal during biogas generation. Therefore, an integrated approach should be taken when considering iron salts usage in an urban wastewater system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 146, 1 December 2018, Pages 109-117
نویسندگان
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