Lignocellulosic biowastes as carrier material and slow release electron donor for sulphidogenesis of wastewater in an inverse fluidized bed bioreactor
| Autor: | Luis C. Reyes-Alvarado, Eric Houbron, Eldon R. Rene, Elena Rustrian, Giovanni Esposito, Piet N.L. Lens, Álvaro Camarillo-Gamboa |
|---|---|
| Přispěvatelé: | Reyes-Alvarado, Luis C, Camarillo-Gamboa, Álvaro, Rustrian, Elena, Rene, Eldon R, Esposito, Giovanni, Lens, Piet N L, Houbron, Eric |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Lignocellulosic biowastes
Hydraulic retention time Health Toxicology and Mutagenesis 0208 environmental biotechnology Industrial Waste Electron donor Sulphate-reducing bacteria (SRB) 02 engineering and technology Wastewater 010501 environmental sciences Cork engineering.material Lignin Waste Disposal Fluid 01 natural sciences chemistry.chemical_compound Hydrolysis Bioreactors Environmental Chemistry Lignocellulosic slow release electron donor (L-SRED) Mineral processing 0105 earth and related environmental sciences Inverse fluidized bed bioreactor (IFBB) Sulphate reduction Sulphidogenesis Biological Oxygen Demand Analysis Chromatography Sulfates Chemistry General Medicine Pulp and paper industry Pollution 020801 environmental engineering Lignocellulosic biowaste Fluidized bed bioreactor engineering Composition (visual arts) Oxidation-Reduction |
| Popis: | Industrial wastewaters containing high concentrations of sulphate, such as those generated by mining, metallurgical and mineral processing industries, require electron donor for biological sulfidogenesis. In this study, five types of lignocellulosic biowastes were characterized as potential low-cost slow release electron donors for application in a continuously operated sulphidogenic inverse fluidized bed bioreactor (IFBB). Among them, natural scourer and cork were selected due to their high composition of volatile solids (VS), viz. 89.1 and 96.3%, respectively. Experiments were performed in batch (47 days) and in an IFBB (49 days) using synthetic sulphate-rich wastewater. In batch, the scourer gave higher sulphate reduction rates (67.7 mg SO42- L-1 day-1) in comparison to cork (12.1 mg SO42- L-1 day-1), achieving >82% sulphate reduction efficiencies. In the IFBB packed with the natural scourer, the average sulphate reduction efficiency was 24 (±17)%, while the volumetric sulphate reduction rate was 167 (±117) mg SO42-L-1 day-1. The long incubation time in the batch experiments (47 days) allowed higher sulphate reduction efficiencies in comparison to the short hydraulic retention time (24 h) in the IFBB. This suggests the hydrolysis-fermentation was the rate-limiting step and the electron donor supply (through hydrolysis of the lignocellulosic biowaste) was limiting the sulphate reduction. Lignocellulose as carrier material and slow release electron donor for sulphidogenesis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|