ASBR applied to the treatment of biodiesel production effluent: effect of organic load and fill time on performance and methane production.
The effect of organic matter and fill time on anaerobic sequencing batch reactor (5 L, 30 °C, 8-h cycles, 50 rpm) efficiency has been analyzed. Organic matter was increased by the influent concentration. Fill times investigated were in the batch mode and fed-batch followed by batch. In the batch mode organic matter removal were 93%, 81%, and 66% for influent concentration of 500, 1,000, and 2,000 mgCOD/L (0.6, 1.29, and 2.44 g COD/L.d), respectively. At 3,000 mgCOD/L (3.82 gCOD/L x d) operational stability could not be achieved. Removal efficiency was improved by increasing the fill time, and was 85% for the 1,000 mgCOD/L condition and fill times of 2 and 4 h, and 80 and 77% for the 2,000 mgCOD/L condition and fill times of 2 and 4 h, respectively. Hence, gradual feeding seemed to improve and to smooth the profiles of organic matter and volatile acids along the cycle with 78 to 96 NmLCH₄/gCOD.
Selma
Vivian C
VC
Escola de Engenharia Mauá-Instituto Mauá de Tecnologia (EEM/IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul, São Paulo, Brazil.
Cotrim
Luís H B
LH
Rodrigues
José A D
JA
Ratusznei
Suzana M
SM
Zaiat
Marcelo
M
Foresti
Eugenio
E
D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D008697:Methane / Q000096:biosynthesis* / Q000378:metabolism; D013997:Time Factors
D056804:Biofuels; D008697:Methane