Sadjadi, Seyed Amir Mahdi (2022) Evaluation of the Impact of Physical and Chemical Pretreatment on the Anaerobic Digestibility of Sewage Sludge. Research Project, Industrial Engineering and Management.
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Abstract
The master research project is focused on investigating pretreatment methods to enhance the anaerobic digestibility of municipal sewage sludge. The research aims to perform a screening of various available methods. In this regard, three key chemical and physical pretreatments, namely heat, alkaline hydrolysis, and sonication, are investigated via the application of standard protocols of biomethane and substrates quantification. Heat and alkaline hydrolysis are observed to enhance digestibility in both methane production and startup significantly. Heat treatment resulted in up to 16.27% of the theoretical production to be reached compared to just 9.6% of the standard (control) setup, whereas Alkaline hydrolysis resulted in the more substantial value of 30.8% potential reached. Low-temperature heat treatment and alkaline hydrolysis are identified to enhance the digestion process substantially. However, the introduction of chemicals and alteration in the effluent may lead to operational limitations, as well as regulations to consider regarding the effluent. For this, further analysis of critical temperature and dosage boundaries in addition to an in-depth evaluation of externalities together with a representative stakeholder analysis is recommended. Further analysis of sonication is discouraged due to the solid content of the samples; literature has noted that this factor is likely going to lead towards an unfavorable energy balance.
| Item Type: | Thesis (Research Project) |
|---|---|
| Supervisor name: | Euverink, G.J.W. and Krooneman, J. |
| Degree programme: | Industrial Engineering and Management |
| Thesis type: | Research Project |
| Language: | English |
| Date Deposited: | 17 Mar 2022 10:25 |
| Last Modified: | 17 Mar 2022 10:25 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/26706 |
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