【摘要】 在内循环气升式间歇反应器对好氧颗粒污泥颗粒化过程进行了研究,从污泥负荷率和碳源特性分析了好氧颗粒污泥的稳定性。以蔗糖为碳源时,反应器在较低的曝气量下生长有大量的丝状真菌,而在较高的曝气量下有利于污泥形成表面光滑的颗粒,但当污泥负荷过低时,光滑的颗粒污泥表面开始迅速生长丝状真菌而导致颗粒污泥不稳定。试验表明以蔗糖为碳源物质形成好氧颗粒污泥速率快,但其操作条件难控制,容易引起丝状真菌的大量生长;以乙酸钠为碳源物质,形成颗粒污泥速度慢,污泥颗粒化程度不高;而以蔗糖与乙酸钠为混合型碳源进行好氧颗粒污泥的培养证明了形成的好氧颗粒污泥表面光滑,没有丝状菌的存在,并且颗粒污泥易于稳定运行。更多还原

【Abstract】 The influencing factors on stability of aerobic granules were studied in sequencing batch airlift reactors. Different aeration volumes such as 0.06m3/h and 0.12m3/h were conducted in two reactors R1 and R2 respectively while sucrose acted as solo carbon source. Aerobic granules formed under 0.06 m3/h were not stable for heavy growth of filamentous organisms in R1, but aerobic granules formed under 0.12 m3/h were easier to reach maturity in R2. When sludge loading rate was below 0.4kg/kg.d in R2, surface of aerobic granules began to grow filamentous organisms which led to instability of aerobic granules. When acetic sodium acted as carbon source in reactor, it was found aerobic granules structure was loose. It was concluded that mixed carbon source such as sucrose and acetic sodium improved the stability of aerobic granules distinctly.更多还原