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Optimization of Biological Sulphate Reduction to Treat Inorganic Wastewaters - Process Control and Potential Use of Methane as Electron Donor (Hardcover)
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Optimization of Biological Sulphate Reduction to Treat Inorganic Wastewaters - Process Control and Potential Use of Methane as Electron Donor (Hardcover)
Series: IHE Delft PhD Thesis Series
Expected to ship within 12 - 17 working days
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This work investigated two different approaches to optimize
biological sulphate reduction in order to develop a process control
strategy to optimize the input of an electron donor and to study
how to increase the feasibility of using a cheap carbon source.
Feast/famine regimes, applied to design the control strategy, were
shown to induce the accumulation of storage compounds in the
sulphate reducing biomass. This study showed that delays in the
response time and a high control gain can be considered as the most
critical factors affecting a sulphide control strategy in
bioreactors. The delays are caused by the induction of different
metabolic pathways in the anaerobic sludge, including the
accumulation of storage products. On this basis, a mathematical
model was developed and validated. This can be used to develop
optimal control strategies. In order to understand the microbial
pathways in the anaerobic oxidation of methane coupled to sulphate
reduction (AOM-SR), diverse potential electron donors and acceptors
were added to in vitro incubations of an AOM-SR enrichment at high
pressure. Acetate was formed in the control group, probably
resulting from the reduction of CO2. These results support the
hypothesis that acetate may serve as an intermediate in the AOM-SR
process.
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