Organic loading rate impact on biohydrogen production and microbial communities at anaerobic fluidized thermophilic bed reactors treating sugarcane stillage.
This study aimed to evaluate the effect of high organic loading rates (OLR) (60.0-480.00 kg COD m(-3)d(-1)) on biohydrogen production at 55°C, from sugarcane stillage for 15,000 and 20,000 mg CODL(-1), in two anaerobic fluidized bed reactors (AFBR1 and AFBR2). It was obtained, for H2 yield and content, a decreasing trend by increasing the OLR. The maximum H2 yield was observed in AFBR1 (2.23 mmol g COD added(-1)). The volumetric H2 production was proportionally related to the applied hydraulic retention time (HRT) of 6, 4, 2 and 1h and verified in AFBR1 the highest value (1.49 L H2 h(-1)L(-1)). Among the organic acids obtained, there was a predominance of lactic acid (7.5-22.5%) and butyric acid (9.4-23.8%). The microbial population was set with hydrogen-producing fermenters (Megasphaera sp.) and other organisms (Lactobacillus sp.).
['Santos|Samantha Christine|SC|', 'Rosa|Paula Rúbia Ferreira|PR|', 'Sakamoto|Isabel Kimiko|IK|', 'Varesche|Maria Bernadete Amâncio|MB|', 'Silva|Edson Luiz|EL|']
D000693:Anaerobiosis D001419:Bacteria D044822:Biodiversity D018441:Biofilms D056804:Biofuels D057919:Biological Oxygen Demand Analysis D019149:Bioreactors D001709:Biotechnology D002241:Carbohydrates D006859:Hydrogen D009584:Nitrogen D009930:Organic Chemicals D010758:Phosphorus D010802:Phylogeny D031786:Saccharum D013431:Sulfates D013997:Time Factors D014865:Waste Disposal, Fluid
Lactic acid Lactobacillus sp. Megasphaera elsdenii Organic overload