We also roughly estimated the average organic carbon reduction
in sludge fermentation phase and the biological transformation
of organics during PHA production phase in the pilot scale
system, which were about 30% and 25% (as shown by YP/S (gPHA/
gCOD) and YX/S (gX/gCOD)) respectively. Accurate calculation
results can only be obtained by further study with specific experimental
design.