دورية أكاديمية

Effect of ammonia load on efficiency of nitrogen removal in an SBBR with liquid-phase circulation

التفاصيل البيبلوغرافية
العنوان: Effect of ammonia load on efficiency of nitrogen removal in an SBBR with liquid-phase circulation
المؤلفون: Canto, C. S. A., Ratusznei, S. M., Rodrigues, J. A. D., Zaiat, M., Foresti, E.
المصدر: Brazilian Journal of Chemical Engineering. June 2008 25(2)
بيانات النشر: Brazilian Society of Chemical Engineering, 2008.
سنة النشر: 2008
مصطلحات موضوعية: Nitrification and denitrification, Immobilized biomass, Sequencing batch biofilm reactor, Liquid-phase circulation
الوصف: The removal of biological nitrogen from a synthetic wastewater with different ammonium nitrogen concentrations (50 and 100 mgN-NH4+/L) by a nitrification and denitrification process using a sequencing batch biofilm reactor (SBBR) with liquid-phase circulation was studied. The system with a total working volume of 4.6 L (3.7 L in the reactor and 0.9 L in the reservoir) treated 2.1 L of synthetic wastewater in 12-h cycles. As inoculum two types of biomass were used: an anaerobic/anoxic one from an up-flow anaerobic sludge blanket reactor (UASB) and an aerobic one from a prolonged aeration activated sludge system. The system, maintained at 30 ± 1 ºC, operated in batch mode followed by fed-batch mode and was aerated intermittently. During fed-batch operation the reactor was fed with an external carbon source as electron donor in the denitrifying step and with no aeration. When the reactor was fed with 50 mgN-NH4+/L, efficiencies of removal of ammonium nitrogen and total nitrogen from the effluent were 93.8 and 72.2%, respectively, and nitrite, nitrate and organic nitrogen concentrations were 0.07, 6.4 and 0.5 mg/L, respectively. On the other hand, when the influent ammonium nitrogen concentration was 100 mgN-NH4+/L, residual nitrite and nitrate were 0.17 and 20.4, respectively, and no N-Org was found in the effluent. It should be mentioned that residual nitrate remained unaltered at the different C/N ratios used. Consequently, efficiency of total nitrogen removal was reduced to 66.7%, despite efficiency of ammonium nitrogen removal exceeding 90%. These results show the potential of the proposed system in removing ammonium nitrogen from liquid effluents with a moderate ammonium nitrogen concentration.
نوع الوثيقة: article
وصف الملف: text/html
اللغة: English
تدمد: 0104-6632
DOI: 10.1590/S0104-66322008000200007
URL الوصول: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322008000200007
حقوق: info:eu-repo/semantics/openAccess
رقم الأكسشن: edssci.S0104.66322008000200007
قاعدة البيانات: SciELO
الوصف
تدمد:01046632
DOI:10.1590/S0104-66322008000200007