Print Email Facebook Twitter Characterization and modelling of full-scale aerobic granular sludge Title Characterization and modelling of full-scale aerobic granular sludge Author van den Berg, L. Contributor Pronk, M. (mentor) Faculty Civil Engineering and Geosciences Department Water Management Programme Sanitary Engineering Date 2017-05-24 Abstract Existing mathematical models for aerobic granular sludge have focused solely on lab-scale reactors. In this study, an effort was made to adapt these models to simulate the processes of full-scale installations. The model is the first aerobic granular sludge model to use transient radial diffusion and multiple granule fractions. Aerobic and anoxic endogenous processes were added to the model as well. Despite these changes, the existing metabolic models for phosphate accumulating organisms were not capable of describing the behavior at the low storage polymer levels encountered in full-scale installations. Analysis of influent data of three full-scale plants revealed the low-loaded character of these installations and the significant role of maintenance processes play. With an analysis of ammonia and phosphate mass balances it was shown that the phosphate release to substrate uptake ratio was much lower than predicted by metabolic models. This suggests polyphosphate only plays a minor role in anaerobic generation of energy for substrate uptake. Most likely, glycogen is used as energy source instead, due to the lack of stored polyphosphate. Two parameters were used to analyze the state of an installation, the VFA-load [mg HAc-eq/gVSS/d] and the P-load [mg P/gVSS/d]. More research on the metabolism of phosphate accumulating organisms at low storage polymer levels is required to obtain a viable model of full-scale aerobic granular sludge. Subject Aerobic granulesmodelingEBPRmetabolism To reference this document use: http://resolver.tudelft.nl/uuid:f8118005-d26f-4f57-81af-e4218e38acfd Embargo date 2019-05-24 Part of collection Student theses Document type master thesis Rights (c) 2017 van den Berg, L. Files PDF FinalThesis_LennovandenBerg.pdf 23.36 MB Close viewer /islandora/object/uuid:f8118005-d26f-4f57-81af-e4218e38acfd/datastream/OBJ/view