کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8851342 | 1618768 | 2018 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of sludge enhanced aeration on nutrient contents and phytotoxicity of anaerobically digested centrate
ترجمه فارسی عنوان
اثر لجن افزایش هوادهی بر محتویات مواد مغذی و فیتوتوکسیسیت های هضم کننده بی هوازی
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کلمات کلیدی
هضم بی هوازی متمرکز کردن سموم حیوانی، درمان هوازی لجن فعال
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
In this study, we investigated the impact of intensive aeration pre-treatment on nutrient contents and phytotoxicity of anaerobically digested manure centrate. Activated sludge from conventional wastewater treatment plants was added to reinforce the aeration process. Results show that the addition of activated sludge did not negatively affect the nutrient contents, but significantly reduced the phytotoxicity of digested centrate, as indicated by an enhancement of seed germination index, during the aeration treatment. Based on the orthogonal experiment and following statistical analysis, the lowest phytotoxicity of digested centrate could be achieved under the aeration conditions: sludge concentration of 6â¯g/L, aeration time of 2â¯h, gas/water ratio of 40:1, and pHâ¯=â¯6.5. Of these operational parameters, the digested centrate pH dominantly determined its nutrient contents (e.g., amino acids, total phosphorus, and ammonium) and phytotoxicity. These results were further verified by hydroponic experiments, which showed that using digested centrate after sludge enhanced aeration as the nutrient solution facilitated the growth and dry biomass of maize.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 203, July 2018, Pages 490-496
Journal: Chemosphere - Volume 203, July 2018, Pages 490-496
نویسندگان
Wenhai Luo, Bangxi Zhang, Yanmeng Bi, Guoxue Li, Qiaoping Sun,