进水碳源对好氧颗粒污泥特性的影响

Influence of Carbon Source on the Characteristics of Aerobic Granules

采用气升式内循环间歇反应器对好氧污泥颗粒化过程进行了研究,考察了反应器分别以蔗糖和乙酸钠为进水碳源时好氧颗粒污泥的特性。实验结果表明:好氧颗粒污泥的形成特性与进水碳源有很大的关系;以蔗糖为碳源时,好氧污泥颗粒化速度快,好氧颗粒污泥表面被丝状物包裹,颗粒中w(VSS)为92%;以乙酸钠为碳源时,污泥颗粒化速度慢,好氧颗粒污泥表面光滑,w(VSS)只有55%左右;不同碳源下形成的好氧颗粒污泥沉降性能差别不大,但好氧颗粒污泥胞外多聚物的含量有很大差别。结果表明,由于进水碳源不同,好氧颗粒污泥特性和废水处理能力有一定的差别。

The granulation of aerobic sludge was studied in internal-circulation sequencing batch airlift reactors (SBAR(. The characteristics of aerobic granules with different carbon sources, including sucrose and sodium acetate, were investigated. The experimental data showed that the formation of aerobic granules had great relationship with the inlet carbon sources. The settling ability and specific gravity of aerobic granules were little different, but the content of VSS was 92% when sucrose acted as carbon source and only 55% when sodium acetate acted as carbon source. Carbon source also affected the production of EPS in aerobic granules. It was concluded that carbon source had a critical role in the aerobic granulation.