MDAT-IAT同步脱氮除磷工艺活性污泥在不同基质中的厌氧释磷特性研究

对改进型MDATIAT(ModifiedDemandedAerationTankIntermittentAerationTank)同步脱氮除磷工艺中活性污泥在不同基质下的厌氧释磷特性进行了研究.在葡萄糖、甲酸钠、乙酸钠和丙酸钠4种单一基质中,活性污泥厌氧释磷量分别为1.58、3.55、3.04和1.86mg·L-1;释磷速率分别达到0.02、0.05、0.15和0.10mg·L-1·min-1.另外,在葡萄糖、甲酸钠、乙酸钠和丙酸钠组成的混合基质中的活性污泥厌氧释磷试验结果表明,混合基质中活性污泥释磷量和释磷速率均大于4种单一基质中的释磷量和释磷速率,分别达到8.51mg·L-1和0.31mg·L-1·min-1.

The characteristic of the phosphorus anaerobic release from activated sludge in different substrates with MDAT-IAT process

The characteristic of the phosphorus release from activated sludge under anaerobic condition in different substrates with Modified Demanded Aeration Tank-Intermittent Aeration Tank(MDAT-IAT) process was studied. The amounts of phosphorus release from activated sludge were 1.58 (mg·L^-1), 3.55 (mg·L^-1), 3.04 (mg·L^-1) and 1.86 (mg·L^-1), and the rates of the phosphorus release were 0.02 (mg·L^-1·min^-1), 0.05 (mg·L^-1·min^-1), 0.15 (mg·L^-1·min^-1) and 0.06 (mg·L^-1·min^-1) with glucose, sodium format, sodium acetate and sodium propionate as a sole carbon source, respectively. The phosphorus release from activated sludge under anaerobic condition in the mixture of the same four substrates was also studied. The results indicated that the amount and rate of phosphorus release in the mixed substrates were much greater than those in the four sole substrates, reaching 8.51(mg·L^-1) and 0.31 (mg·L^-1·min^-1), respectively.