Abstract

RINCON, Nancy; GALINDO, Andres  and  PEREZ, Jhonny. Evaluation of the Hydraulic Behaviour in a Double-Chamber Anaerobic Reactor (DCAR). Rev.fac.ing.univ. Antioquia [online]. 2011, n.61, pp.53-63. ISSN 0120-6230.

In the organic load removal in a wastewater treatment system, biochemical processes and hydrodynamic aspects take place as characteristics of the flow, mix regime, residence times and reactor geometry, otherwise, the conditions for non-ideal flow as by-passing, dead zones and internal recirculation affect their performance. This study deals with an evaluation ofthe hydraulic behavior of a double-chamber anaerobic reactor (DCAR) of 534.5L (chamber 1=305L and chamber 2=229.5L) as a technological innovation of the UASB reactors. The DCAR was fed with Maracaibo, Venezuela municipal wastewater; each chamber was inoculated with a granular, local brewery sludge (20% v/v). The hydraulic evaluation was performed at the liquid phase and in operation, using Li⁺ (LiCl) as a tracer applied in an instantaneous way at the affluent at the theoretical hydraulic retention time (TRHt) of 6 hours; 3.4 in the chamber number 1 and 2.6 in chamber number 2. The DCAR described as a plug flow in both chambers and a hydraulic efficiency close to the unit (1), indicating an almost null presence of dead zones. The CDO (CDOT) of DCAR removal efficiency was kept in the range of 59.77% to 74.46% with an average of 68.26%. For chambers 1 and 2 the average efficiency was 60.4 and 20.94 with a biogas production (L/h) of 2.768 and 0.541 respectively.

Keywords : double-chamber reactor; dispersion coefficient; hydraulic efficiency; dead zones.

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