کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7480404 | 1485235 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of anaerobic digestion of sewage sludge through microwave pre-treatment
ترجمه فارسی عنوان
بهبود هضم بی هوازی لجن فاضلاب از طریق پیش آماده سازی مایکروویو
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کلمات کلیدی
پیش درمان مایکروویو، هضم بی هوازی مازوفیلی، بهینه سازی، لجن فاضلاب، انرژی خاصی استفاده می شود، سینتیک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Sewage sludge generated in the activated sludge process is a polluting waste that must be treated adequately to avoid important environmental impacts. Traditional management methods, such as landfill disposal or incineration, are being ruled out due to the high content in heavy metal, pathogens, micropolluting compounds of the sewage sludge and the lack of use of resources. Anaerobic digestion could be an interesting treatment, but must be improved since the biomethanisation of sewage sludge entails low biodegradability and low methane production. A microwave pre-treatment at pilot scale is proposed to increase the organic matter solubilisation of sewage sludge and enhance the biomethanisation yield. The operational variables of microwave pre-treatment (power and specific energy applied) were optimised by analysing the physicochemical characteristics of sewage sludge (both total and soluble fraction) under different pre-treatment conditions. According to the variation in the sCOD and TN concentration, the optimal operation variables of the pre-treatment were fixed at 20,000Â J/g TS and 700Â W. A subsequent anaerobic digestion test was carried out with raw and pre-treated sewage sludge under different conditions (20,000Â J/g TS and 700Â W; 20,000Â J/g TS and 400Â W; and 30,000Â J/g TS and 400Â W). Although stability was maintained throughout the process, the enhancement in the total methane yield was not high (up to 17%). Nevertheless, very promising improvements were determined for the kinetics of the process, where the rG and the OLR increased by 43% and 39%, respectively, after carrying out a pre-treatment at 20,000Â J/g TS and 700Â W.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 177, 15 July 2016, Pages 231-239
Journal: Journal of Environmental Management - Volume 177, 15 July 2016, Pages 231-239
نویسندگان
A. Serrano, J.A. Siles, M.A. MartÃn, A.F. Chica, F.S. Estévez-Pastor, E. Toro-Baptista,