预加好氧颗粒对SBR中好氧颗粒污泥形成的影响

以活性污泥曝气池中的絮状活性污泥为接种污泥,采用人工配制的模拟生活污水,通过观测颗粒形态和粒径的变化,研究预先加入15%成熟好氧颗粒污泥对好氧颗粒污泥形成过程的影响.对比研究发现,2个反应器内小颗粒（0 .1～0 .3　cm）的形成均较快,但大颗粒的形成速度相差明显.培养过程中还能明显观察到丝状菌缠绕和絮状污泥黏附在小颗粒表面.反应器启动第1、7、14 d,污泥平均体积粒径分别从0 .10、0 .16 cm上升到0 .23、0 .30 cm,最终达到0 .28、0 .43 cm.研究结果表明,预先加入15%成熟好氧颗粒污泥,能加速好氧颗粒污泥在反应器内形成.

Acceleration of the Formation of Aerobic Granules in SBR by Inoculating Mature Aerobic Granules

The effects of additional mature aerobic granules to the formation of aerobic granules were investigated by inoculating activated sludge and feeding synthetic municipal wastewater.The change of granular configuration and diameter was observed during the cultivation process.The average sludge volume diameter rose from 0.10,0.16 cm to 0.23,0.30 cm,and finally was up to 0.28,0.43 cm at the 1 th,7 th and 14th day respectively.Small granules with diameter from 0.1 to 0.3 cm had a relative rapid formation speed in both reactors,whereas,the differences of the formation speed of big granules were obvious.There were filamentous bacteria winging and floc sludge adhering to the surface of small granules through cultivation process.The results showed aerobic granules could form more rapidly when 15% mature aerobic granules were put into the reactor.