Artículos de revistas
Nitrogen Removal In Combined Anoxic-aerobic System With Imobilized Biomass
Registro en:
Nitrogen Removal In Combined Anoxic-aerobic System With Imobilized Biomass. Assoc Brasileira Engenharia Sanitaria Ambiental, v. 20, p. 55-64 JAN-MAR-2015.
1413-4152
WOS:000357414200005
10.1590/S1413-41522015020000121276
Autor
Rodrigues Foco
Mario Luiz; dos Reis Lopes
Guilherme Pio; Abdul Nour
Edson Aparecido
Institución
Resumen
This work aims to study the performance of a combined system in the removal of organic matter and nitrogen from sanitary sewage through internal recirculation of the effluent. The bench scale reactors were: anoxic filter (32.6 L), submerged aerated biofilter (17.6 L) and secondary settler (7.2 L). The recirculation rates were 0.5; 1.5; 2.0 and 4.0 without added external-carbon or alkalising. In 4.0 recirculation rate, the organic and nitrogen loading rates applied to the system were 0.7 +/- 0.3 kg chemical oxygen demand.m(-3).d(-1) and 0.08 +/- 0.02 kg N-NH4+.m(-3).d(-1), reaching removals of chemical oxygen demand and total nitrogen of 92 +/- 4% and 83 +/- 8%, respectively. The results show the feasibility of using recirculation of effluent, once the final concentrations of total nitrogen (12 +/- 3 mg.L-1) are below the value stipulated by CONAMA Resolution no 430/2011. 20 1
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