کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1055359 1485234 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of high-rate TN removal in a novel constructed wetland integrated with microelectrolysis system treating high-strength digestate supernatant
ترجمه فارسی عنوان
بهینه سازی حذف TN با سرعت بالا در یک تالاب جدیدالاحداث یکپارچه شده با سیستم میکروالکترولیز برای تصفیه مواد پسماند بی هوازی شناور روی آب با مقاومت بالا
کلمات کلیدی
تالاب جدیدالاحداث جریان افقی؛ مواد پسماند بی هوازی شناور روی آب؛ هوادهی متناوب؛ چرخش پساب؛ سیستم میکروالکترولیز
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


• Treatment of high-strength digestate supernatant in horizontal flow CWs was verified.
• Intermittent aeration stimulated complete nitrification but limited TN removal rate.
• Effluent recirculation promoted denitrification and increased TN removal.
• Microelectrolysis process as post treatment was verified to enhance TN removal.

The potential of high-rate TN removal in three aerated horizontal subsurface-flow constructed wetlands to treat high-strength anaerobic digestate supernatant was evaluated. Different strategies of intermittent aeration and effluent recirculation were applied to compare their effect on nitrogen depuration performance. Additional glucose supply and iron-activated carbon based post-treatment systems were established and examined, respectively, to further remove nitrate that accumulated in the effluents from aerated wetlands. The results showed that intermittent aeration (1 h on:1 h off) significantly improved nitrification with ammonium removal efficiency of 90% (18.1 g/(m2·d)), but limited TN removal efficiency (53%). Even though effluent recirculation (a ratio of 1:1) increased TN removal from 53% to 71%, the effluent nitrate concentration was still high. Additional glucose was used as a post-treatment option and further increased the TN removal to 82%; however, this implementation caused additional organic pollution. Furthermore, the iron-activated carbon system stimulated with a microelectrolysis process achieved greater than 85% effluent nitrate removal and resulted in 86% TN removal. Considering the high TN removal rate, aerated constructed wetlands integrated with a microelectrolysis-driven system show great potential for treating high-strength digestate supernatant.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 178, 1 August 2016, Pages 42–51
نویسندگان
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