污泥回流比对厌氧释磷效果的影响

Effect of Recycle Ratio on Phosphorus Removal of Anaerobic Process

为系统研究厌氧污泥回流比对生物除磷效果的影响,以实际生活污水作为研究水样,研究不同污泥回流比R在厌氧段对COD(化学需氧量)、N(氮)、P(磷)的去除效果;深入研究污泥回流比对生物强化除磷代谢过程的影响。结果表明,在厌氧环境中,污泥回流比对NH4+-N(氨氮)的去除没有明显影响,但对硝态氮、TP(总磷)、COD的去除影响较大。最佳回流污泥比应控制在60%到80%左右,在这两个工况下,PAOs(聚磷菌)释磷量能达到24.13 mg/L,这样能使PAO在厌氧池有效地利用碳源,充分释磷,从而提高除磷效率,同时应控制最佳厌氧有效时间为2到3个小时,如果厌氧时间过长或者过短都对PAO释磷产生一定的负作用。

For the systematic study of anaerobic sludge recycle ratio effect on biological phosphorus removal,this paper took real-life pollution water as a water sample to research different anaerobic sludge recycle ratio of COD,N,P removal effect,and to do an in-depth study of sludge reflux ratio for enhanced biological phosphorus removal metabolism processes.The results showed that there is no significant effect of the reflux ratio on the removal of NH＋4-N when the sludge in the anaerobic environment,but it has a great impact on nitrate-N,TP,COD removal.Best return sludge ratio should be controlled at 60% to 80%,because in these two operating conditions,PAO release of phosphorus content can reach 23.73mg / L,in this way,PAO in the anaerobic tank will have an effective use of carbon sources,full release phosphorus,thereby enhancing phosphorus removal efficiency.At the same time,the best time for the anaerobic should be effective controlled at 2~3 hours.Either the time of anaerobic too long or too short may make PAO phosphorus release certain negative effects.