کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7068544 1459891 2018 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of free nitrous acid pre-treatment on waste activated sludge
ترجمه فارسی عنوان
بهینه سازی قبل از درمان اسید آزاد نیترات روی لجن فعال
کلمات کلیدی
هضم بی هوازی پیش آزمون بدون اسید نیتریک، نیتریت، تولید متان، لجن فعال زباله، تجزیه زیستی لجن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The effectiveness of the Free Nitrous Acid (FNA) sludge treatment was tested in the range from 0 to 3.0 mg N-HNO2/L with acidified and neutral pH. 4 h pre-treatment times were used and the specific methane production (SMP) investigated. Results show that between 50 and 100 mg/L of N-NO2−/L disappeared during the FNA pre-treatment, reducing its effectiveness. A minimum level of nitrite (174 mg N-NO2−/L tested in this study), independently of pH/FNA, was necessary to assure the presence of the chemical throughout the duration of the pre-treatment. Sludge viability was compromised while WAS solubilization and SMP were enhanced with nitrite concentrations of 174 mg N-NO2−/L or higher, even at low FNA levels (<0.15 mg N-HNO2/L). Results show that acidified pH is not needed to enhance methane production, making the pretreatment more economically and environmentally attractive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 252, March 2018, Pages 216-220
نویسندگان
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