عنوان المقالة: Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor
علي وحيد نغيمش العتابي | Ali W Alattabi | 2875
نوع النشر
مجلة علمية
المؤلفون بالعربي
المؤلفون بالإنجليزي
David Phipps Ali W. Alattabi, Clare B. Harris, Rafid M. Alkhaddar, Khalid S. Hashim, Montserrat Ortoneda-Pedrola
الملخص الانجليزي
Sludge settleability is considered one of the main drawbacks of sequencing batch reactors. The aim of this study therefore is to improve sludge settleability by introducing a novel, two-stage settling sequencing batch reactor (TSSBR) separated by an anoxic stage. The performance of the TSSBR was compared with that of a normal operating sequencing batch reactor (NOSBR), operating with the same cycle time. The results show a significant improvement in sludge settleability and nitrogen compound removal rates for the TSSBR over the NOSBR. The average removal efficiencies of NH3-N, NO3-N and NO2-N have been improved from 76.6%, 86.4% and 87.3% respectively for the NOSBR to 89.2%, 95.2% and 96% respectively for the TSSBR. In addition, the average SVI30 for the NOSBR has been reduced from 42.04 ml/g to 31.17 ml/g for the TSSBR. After three months of operation, there was an overgrowth of filamentous bacteria inside the NOSBR reactor, while the morphological characteristics of the sludge inside the TSSBR reactor indicated a better and homogenous growth of filamentous bacteria.
تاريخ النشر
14/11/2017
الناشر
Journal of Water Process Engineering
رقم المجلد
رقم العدد
20
رابط DOI
https://doi.org/10.1016/j.jwpe.2017.11.004
الصفحات
207-216
رابط خارجي
https://www.sciencedirect.com/science/article/abs/pii/S2214714417305512
الكلمات المفتاحية
Filamentous bacteriaNitrogen removalSequencing batch reactorSludge settleabilityWastewater treatment
رجوع