Wastewater treatment and concentration of phosphorus with the hybrid osmotic microfiltration bioreactor

摘要: Abstract The implementation of both an osmotic membrane and a microfiltration (MF) into biological reactor is promising solution for wastewater treatment. It has the potential enhanced phosphorus recovery, if main part water leaves through forward osmosis (FO) with MF permeate. In this study, hybrid bioreactor was built to operated 46 days concentrate in sludge. A mathematical model developed simulate development concentration at varying FO flows. simulation experimental data shows that dissolved depends on volume relative flow excess sludge outtake, defining nutrient retention time (NRT). Analysis mass balances modelling showed concentrations above 40 mg/L could be extracted from reactor, which precipitated reactor. Longer NRT also leads elevated conductivity, contributes higher pressure, hence lower flux, deflocculation inhibition microbial activity. Therefore, it recommended restrict factor level, conductivity less than 20 mS/cm below 40 mg/L.