From waste to products: alternatives to transform industrial and urban residues into valuable products
- Authors
- Acosta Ortiz, Nayaret Karina
- Format
- MasterThesis
- Status
- publishedVersion
- Description
The topic of the thesis is energy and resource recovery evaluation by anaerobic treatments from waste streams. The study has been carried out between the Itaipu Technological Park (PTI) located in Iguassu Falls, Brazil and Laboratory of Microbial Ecology and Technology (LabMET), Belgium. Firstly, a theoretical evaluation from different urban residues was made in PTI focusing on biogas production. Secondly, urban waste prioritized from the theoretical evaluation and four industrial side streams refineries were evaluated by means BMP tests in mesophilic and thermophilic ranges. The main outcome of the tests showed that food waste (FW), 600 L per kg volatile substrate, and common grass (CG), 300 L/ Kg VS, were the most suitable biomasses for anaerobic digestion. Co-digestion improves the biogas production when CG is used as main substrate. The results of BMP of industrial waste showed that Molasses and Attero had the highest biogas production in mesophilic range. In thermophilic conditions, Molasses and Alco obtained the highest biogas production. In the Belgian framework, resource recovery has been tested by means of fermentation processes within the carboxylate platform. This approach intends to obtain fatty acids as building blocks instead of degrading all organic matter to methane. Different set-ups were tested with molasses or thin stillage (Alco) from a first generation biorefinery. Both substrates were also evaluated for biogas production by means of continuous reactors. Operational parameters have been tested to maximize carboxylate production and decrease methanogenic activity. In the molasses CSTR fermenter, the highest OLR was 4.24 g COD/L day on average. It is clear that OLR variations affect directly VFA production. There was a VFA production for acetate, butyrate and valerate with 0.60, 0.49 and 0.24 g/L day respectively. The conversion efficiency from COD to VFA was 56%.
- Publication Year
- 2014
- Language
- eng
- Topic
- BIOTECNOLOG?A AMBIENTAL
DIGESTI?N ANAEROBIA
PLATAFORMA DE CARBOXILATOS
BIOREFINER?AS
RESIDUOS
BIOTECNOLOG?A INDUSTRIAL
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License
- openAccess