好氧颗粒污泥胞外聚合物（EPS）的生化性研究

将人工培养的好氧颗粒污泥进行饥饿试验，研究EPS的可生化性.结果表明，好氧颗粒污泥EPS是由40%可生物降解EPS和60%不可生物降解EPS组成的，其中可生物降解EPS可作为颗粒污泥自身的能源，而不可生物降解EPS则不行，但其对颗粒污泥的立体结构有巨大作用.将从新鲜好氧颗粒污泥中提取的EPS投加到好氧颗粒污泥和活性污泥中，提取的EPS均可被两者作为碳源利用，且活性污泥对EPS的利用速率是好氧颗粒污泥的1.5倍；而从饥饿好氧颗粒中提取的EPS作为两者碳源时，均没有明显的利用效果，说明不可生物降解的EPS不能作为两者的能源.

Biodegradability of Extracellular Polymeric Substances (EPS)Produced by Aerobic Granules

Aerobic granules were cultivated with synthetic wastewater and were added in the course of aerobic starvation. Results showed that EPS produced by aerobic granules was composed of 40% biodegradable and 60% nonbiodegradable EPS. Among these, only biodegradable EPS could be utilized by their producers, while nonbiodegradable EPS contributed to maintain the spatial structures of aerobic granules. EPS extracted from fresh aerobic granules was fed as the sole carbon source to their own producers and activated sludge and was utilized by them. The average biodegradation rate of activated sludge in terms of EPS was 1.5 times faster than that of aerobic granules. When EPS extracted from starved aerobic granules was fed as the sole carbon source to their own producers and activated sludge, it could not be utilized and could not be energy source.