亚硝酸盐对聚磷菌吸磷效果的影响

以厌氧/好氧生化反应器中的聚磷菌为实验对象,探讨了亚硝酸盐对聚磷菌吸磷效果的影响.结果表明:低浓度NO₂^--N可以作为聚磷菌的电子受体,实现NO₂^--N型反硝化除磷,但吸磷总量和吸磷速率明显低于NO₃^--N型反硝化除磷的效果;当NO₂^--N和NO₃^--N共存于缺氧环境时,NO₂^--N对NO₃^--N型反硝化除磷的除磷总量和速率没有影响,但会降低NO₃^--N的消耗量;NO₂^--N型反硝化除磷污泥的好氧吸磷量和速率均低于传统A/O厌氧放磷污泥的效果,但由于它经历了缺氧吸磷和好氧吸磷2个阶段,因此,从吸磷总量或出水水质看,二者相差不大.

Effects of Nitrite on Phosphorus Uptake in Anaerobic/Oxic Process

Intermediate products of biological nitrogen removal process,nitrate and nitrite,could be used as electron acceptors for phosphorus removal.This study investigated the effects of nitrite on phosphorus uptake in anaerobic/oxic(A/O) biological phosphorus removal process.The results indicated that in addition to oxygen and nitrate(DPB_Na,Denitrifying Phosphorus removal Bacteria with nitrate as electron acceptor),to some extent,nitrite can also serve as electron acceptor to achieve the nitrite denitrifying phosphorus removal(DPB_Ni).The quantity and rate of phosphorus uptake of DPB_Ni,however,were evidently lower than that of DPB_Na.The nitrite existed in anoxic reactor made no difference to the quantity and rate of denitrifying phosphorus removal.But it would reduce the consumption of nitrate.Moreover,the data showed that the aerobic phosphate uptake of DPB_Ni was lower than that of anaerobic phosphorus-released sludge in traditional A/O process.However,there was no much difference between these two kinds of sludge in terms of the total phosphorus uptake quantity and the effluent quality.