Effect of Fill Time on the Performance of Pilot-scale ASBR and AnSBBR Applied to Sanitary Wastewater Treatment

Abstract

Many lab-scale studies have been carried out regarding the effect of feed strategy on the performance of anaerobic sequencing batch reactors (ASBR); however, more detailed pilot-scale studies should be performed to assess the real applicability of this type of operation. Therefore, the objective of this work was to assess the effect of feed strategy or fill time in a 1-m(3) mechanically stirred pilot-scale sequencing batch reactor, treating 0.65 m(3) sanitary wastewater in 8-h cycles at ambient temperature. Two reactor configurations were used: one containing granular biomass (denominated ASBR) and the other immobilized biomass on polyurethane foam as inert support (denominated anaerobic sequencing batch biofilm reactor (AnSBBR)). The reactors were operated under five distinct feed strategies, namely: typical batch and fed-batch for 25%, 50%, 75%, and 100% of the cycle length. Stirring frequency in the ASBR was 40 rpm with two flat-blade turbine impellers and 80 rpm in the AnSBBR with two helix impellers. The results showed that both the ASBR and AnSBBR when operated under typical batch, fed-batch for 50% and 75% of the cycle length, presented improved organic matter removal efficiencies, without significant differences in performance, thus showing important operational flexibility. In addition, the reactors presented operation stability under all conditions.

ASBR Applied to the Treatment of Biodiesel Production Effluent: Effect of Organic Load and Fill Time on Performance and Methane Production

“…Advancements in the mechanically stirred reactor containing granular biomass show promising results achieved on bench and pilot scale [2,3], applied to different wastewaters, such as sanitary, cheese whey, from the automotive and personal care industry, as well as effluents containing volatile acids, nitrogen, and sulfur compounds. Application of the anaerobic sequencing batch reactors containing granular biomass (ASBR) still depends on insight into some technological aspects, such as application to the treatment of industrial effluents to remove organic matter and obtain methane combined with the generation of the biogas produced in the biotransformation of pollutants.…”

Estudo da produção de biohidrogênio em AnSBBR com recirculação da fase líquida tratando água residuária sintética: efeito da carga orgânica

“…Estudos sobre a influência de variáveis de processo sobre a eficiência e estabilidade do reator anaeróbio operado em batelada sequencial quando aplicado ao tratamento de diferentes efluentes têm sido encontrados em literatura, como os relacionados: (i) ao tipo de mistura, a qual poderá ser implementada por recirculação da fase líquida (Brito et al, 1997;Camargo et al, 2002;Bergamo et al, 2009;Bezerra et al, 2009) ou por agitação mecânica (Angenent et al, 2002;Rodrigues et al, 2003;Rodrigues et al, 2004;Damasceno et al, 2008;Michelan et al, 2009); (ii) ao tempo de enchimento ou estratégia de alimentação (Bagley e Brodkorb, 1999;Shizas e Bagley, 2002;Borges et al, 2004;Orra et al, 2004;Zimmer et al, 2008;Albanez et al, 2009); e (iii) à carga orgânica (Ng, 1989;Massé e Masse, 2000;Chebel et al, 2006;Damasceno et al, 2007;Oliveira et al, 2008;Friedl et al, 2009;Oliveira et al, 2009;Novaes et al, 2010).…”

Estudo do efeito da carga orgânica, da estratégia de alimentação e da temperatura na produção de metano em AnSBBR com agitação tratando vinhaça

“…Estudos sobre a influência de variáveis de processo sobre a eficiência e estabilidade do reator anaeróbio operado em batelada e/ou batelada alimentada sequenciais contendo biomassa granulada ou imobilizada em suporte inerte (ASBR ou AnSBBR) quando aplicado ao tratamento de diferentes efluentes têm sido encontrados em literatura, como os relacionados: (i) ao tipo de mistura, a qual poderá ser implementada por recirculação da fase líquida (CAMARGO et al, 2002;BERGAMO et al, 2009;BEZERRA et al, 2009) ou por agitação mecânica (RODRIGUES et al, 2003(RODRIGUES et al, e 2004DAMASCENO et al, 2008;MICHELAN et al, 2009;NOVAES et al, 2010a); (ii) ao tempo de enchimento ou estratégia de alimentação (SHIZAS; BAGLEY, 2002;BORGES et al, 2004;ORRA et al, 2004;ALBANEZ et al, 2009;NOVAES et al, 2010b;OLIVEIRA et al, 2010;RODRIGUES et al, 2011); e (iii) a carga orgânica (MASSÉ;MASSE, 2000;CHEBEL et al, 2006;DAMASCENO et al, 2007;OLIVEIRA et al, 2008;FRIEDL et al, 2009;OLIVEIRA et al, 2009;CARVALHINHA et al, 2010).…”