Libra J A, Schuchardt A, Sahlmann C, Handschag J, Wiesmann U, Gnirss R
Institute of Chemical Engineering, Technical University Berlin, Germany.
Water Sci Technol. 2002;46(4-5):317-24.
The aeration systems of two full-scale activated sludge basins were compared over 2.5 years under the same operating conditions using dynamic off-gas testing. Only the material of the diffuser was different, membrane vs. ceramic tube diffusers. The experimental design took the complexity and dynamics of the system into consideration. The investigation has shown that, although the membrane diffusers have higher initial standard oxygen transfer efficiency (SOTE) and standard aeration efficiency (SAE), these decreased over time, while the SAE of the ceramic diffusers started lower, but increased slightly over the whole period. Measurement of air distribution in the basins along with dissolved oxygen concentration profiles have provided important information on improving process control and reducing energy costs. The results show that dynamic off-gas testing can effectively be used for monitoring the aeration system and to check design assumptions under operating conditions. The information can be used to improve the design of new aeration systems or in retro-fitting existing basins.
在相同运行条件下，采用动态尾气测试法，对两个全尺寸活性污泥池的曝气系统进行了为期2.5年的比较。仅曝气器材料不同，分别为膜式曝气器和陶瓷管式曝气器。实验设计考虑了系统的复杂性和动态性。研究表明，尽管膜式曝气器的初始标准氧传递效率（SOTE）和标准曝气效率（SAE）较高，但随着时间推移会下降，而陶瓷管式曝气器的SAE初始较低，但在整个期间略有增加。对曝气池中空气分布以及溶解氧浓度分布的测量，为改进过程控制和降低能源成本提供了重要信息。结果表明，动态尾气测试可有效地用于监测曝气系统，并检验运行条件下的设计假设。这些信息可用于改进新型曝气系统的设计或对现有池子进行改造。
