温度及反硝化聚磷对SBMBBR脱氮除磷的影响

实验在维持进水COD、PO^3-₄-P和NH⁺₄-N浓度分别为450 mg/L 、10 mg/L和40 mg/L左右的条件下，考察了较低温度（14℃±1℃）和较高温度（24℃±1℃）对SBMBBR（序批式移动床生物膜反应器）除磷脱氮效果的影响.结果表明，14℃±1℃和24℃±1℃下，PAOs（聚磷菌）的释磷量分别为54 .7 mg/L、19 .7 mg/L；除磷率分别为98 .3%、83 .4%；脱氮率分别为87 .8%、98 .4%.较低温度有利于PAOs的富集，但不利于硝化的进行；较高温度有利于硝化反硝化的进行，但PAOs不再是污泥系统的优势菌种.同时在经过较长时间（3个月）厌氧/好氧运行的污泥系统中进行了厌氧/缺氧反硝化除磷实验，该系统内反硝化聚磷除磷效果较好，反硝化吸磷占总吸磷量的80%左右.

Effect of Temperature and Denitrifying Phosphorus on Nitrogen and Phosphorous Removal in SBMBBR

The effect of two kinds of temperature conditions (14 degrees C +/- 1 degrees C and 24 degrees C +/- 1 degrees C) on the removal of phosphorus and nitrogen were studied in a sequencing batch moving bed biofilm reactor (SBMBBR). The experiments were performed at the concentrations of COD, nitrogen and phosphorus in the feed fixing at about 450 mg/L, 40 mg/L and 10 mg/L, respectively. The results indicated that under the two temperatures the phosphorus release amounts were 54.7 mg/L, 19.7 mg/L, and the phosphorus removals were 98.3%, 83.4%, and the total nitrogen removals were 87.8%, 98.4%, respectively. It found that PAOs (phosphorus-accumulating organisms) predominated in the biomass and the nitrifying level was low at the lower temperature. However, with increase of temperature, PAOs were no longer the predominant microbial species and the total nitrogen removal efficiency increased. A denitrifying phosphorus experiment was carried out under the mode of anaerobic/anoxic in the SBMBBR after 3 months anaerobic/oxic operation. The results showed the ratio of denitrifying phosphorus removal to total phosphorus removal was about 80%.