Abstract
In wastewater treatment by polyurethane foam (PUF) fluidized-bed Bioreactor, it was clarified experi-mentally what responses to stepwise substrate loading for TOC, NH+4-N and NO -x-N concentrations in the effluent are observed. The substrate consumption processes were also simulated numerically by introducing the biochemical reaction models in which the effects of biological predator-prey and symbiosis are taken into consideration.
The simulation results were found to predict fairly well the practical changes with day passage in the TOC, NH +4-N and NO -x-N concentrations in the effluent. The TOC and NH +d-N concentrations show the characteristic peaks and decrease thereafter to go to steady state lower values during about ten days. The NO -x-N concentration increases smoothly after stepwise substrate loading and approaches a steady state value.
