کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
681582 1460038 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Purification processes involved in sludge treatment by a vertical flow wetland system: Focus on the role of the substrate and plants on N and P removal
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Purification processes involved in sludge treatment by a vertical flow wetland system: Focus on the role of the substrate and plants on N and P removal
چکیده انگلیسی

Vertical-flow wetland systems were tested for treatment of liquid waste activated sludge with high content of organic compounds from a soft drink factory. A mesocosm experiment was carried out on planted and unplanted systems to understand the relative importance of substrate and plants in purification processes and to compare three species: Phragmites australis Cav., Typha latifolia L., or Iris pseudacorus L. All planted mesocosms performed better than unplanted mesocosms and Phragmites showed the highest efficiencies, both in volumes and loads, closely followed by Typha. Removal efficiencies were very high in all cases, and physical filtration by the organic substrate was identified as the main processes for nutrient removal (>50%). We showed that plants played direct and indirect roles such as nutrients uptake (up to 23% of the N for Phragmites), evapotranspiration reducing outflow volumes; or improvement of filtration by the root systems and stimulation of microbial activities (respiration rate was double compared to unplanted mesocosms).

Figure optionsDownload as PowerPoint slideHighlights
► Vertical-flow wetland systems were tested for treatment of sludge with high COD.
► All mesocosms had high efficiencies, though planted mesocosms better than unplanted.
► Plants improved efficiency through direct roles: nutrients uptake, evapotranspiration.
► Mesocosms with Phragmites had removal >90%, with up to 23% of the N in the plant.
► Indirect roles were improvement of filtration and stimulation of microbial activities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 105, February 2012, Pages 9–14
نویسندگان
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