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Comparison of Scale in a Photosynthetic Reactor System for Algal Remediation of Wastewater
Published on: March 6, 2017
Biomass growth and its mobility in an AnSBBR treating landfill leachate
Ronan Cleber Contrera1, Mario José Lucero Culi1, Dione Mari Morita1
1Departamento de Engenharia Hidráulica e Ambiental (PHA), Escola Politécnica (EP), Universidade de São Paulo (USP), Avenida Prof. Almeida Prado, 83 trav. 2, Cidade Universitária, CEP: 05508-900 São Paulo, SP, Brazil.
Abstract:
This work used a pilot scale (with a total volume of 1300 L) Anaerobic Sequencing Batch Biofilm Reactor (AnSBBR) to treat landfill leachate from São Carlos-SP (Brazil) as well as to evaluate the biomass growth and its behavior. Biomass from the bottom of a landfill leachate stabilization pond was immobilized in polyurethane foam cubes as inoculum. The leachate characteristics varied during the experiment. Ethanol or volatile fatty acids were added as additional substrate when the leachate was temporarily recalcitrant. After acclimation, the AnSBBR presented efficiency over 70% (COD removal). A mass balance model, biomass sampling and temporal concentration profiles were performed to obtain a biomass yield coefficient of YX/S = 0.0251 ± 0.0006 gTVS gCOD removed (r2 = 0.999). Additionally, it was observed that a variable fraction of the attached biomass may detach itself or present mobility during the batch time, however returning to fixed bed depending on the substrate type and concentration. This behavior has never been reported by the literature for attached biomass.
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