ベンチスケール活性汚泥処理実験装置と数理モデルを用いた揮発性物質の挙動の把握

抄録

A new simulation model was developed for predicting the fate of volatile organic compounds (VOCs) in activated sludge process. This model considers adsorption, surface and buble volatilization, and biodegradation from the dissolved phase as removal mechanisms. This model has the following characteristics compared with existing models: Oparameter values which can be determined from hydrodynamic conditions and controlled condition by operation, are calculated. 2) this model considers active heterotrophic bacteria that only degrade the target compound, and autotrophic nitrifying bacteria in acitive biomass. 3) mass balance about biochemical reactions, is considered. 4) data about biodegradation by specific active bacteria can be estimated by biodegradation tests and simulation tests validating the tests. The model was evaluated with experimental data using pilot plant. Target compounds were benzen, dichloromethane, toluene, and m, pxylene. As a result, the model fairly simulated the fate of the target compounds in activated sludge process. However, further improvements were considered.