琼脂包埋好氧颗粒污泥的储存及恢复  

Storage and Reactivation of Aerobic Granular Sludge Embedded in Agar

作　　者：赵珏 宣鑫鹏[1,2] 程媛媛 张立楠 龙焙[1,2] 

机构地区：[1]江西省环境岩土与工程灾害控制重点实验室,江西赣州341000 [2]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《中国给水排水》2018年第3期23-29,共7页China Water & Wastewater

基　　金：江西省教育厅科技项目(GJJ150627);江西理工大学大学生创新创业训练计划项目(XZG-16-08-08)

摘　　要：研究了常温及冷藏环境下琼脂包埋的好氧颗粒污泥(AGS)的储存及随后的恢复效果。经过30 d的储存,两种环境下的颗粒的稳定性均出现了一定程度的下降,表现为MLVSS、SOUR等的明显下降,但颗粒的形态及沉降性能变化不大,亦未出现明显的解体。常温储存的琼脂块会散发臭气,并容易引起蚊蝇等繁殖,而冷藏储存除失水收缩外并无明显变化。将储存后的AGS作为接种污泥重新曝气后,两种颗粒均在22 d内成功实现了稳定性恢复,对COD、TIN及TP的去除率均逐渐上升至90%以上。观察发现,常温储存的颗粒经历了两次明显的先解体后重新颗粒化的过程,而冷藏的颗粒只经历了恢复初期先解体后重新颗粒化的过程。根据储存及恢复过程中AGS的表现,琼脂包埋的AGS在冷藏环境下的储存效果更佳。储存后的颗粒的SOUR均在10mgO_2/(g MLSS·h)以上,且未监测到EPS的明显减小,表明琼脂包埋法可在一定程度上维持颗粒的活性及结构完整性。相比于湿式储存,琼脂包埋法实现了AGS的干式储存,对于AGS的流通具有现实意义。Storage and subsequent reactivation of aerobic granular sludge （AGS） embedded by agar under room temperature and refrigeration conditions were investigated. After 30 days＇ storage, granular stability under the two environments dropped a certain extent, which characterized by a sharp decline of MLVSS, SOUR and other properties. However, there were no big changes of granular morphology and settling property, and no obvious disintegration was observed. Odor was smelled during storage of agar block under room temperature, where mosquitoes and flies bred quickly. However, there were no big changes of agar block under refrigeration condition, except volume shrinkage caused by water loss. The AGS was seeded and aerated after storage, it was found that both granules were successfully reactivated within 22 days, and removal rates of COD, TIN, and TP were all gradually rose to more than 90%. Two obvious granular disintegration and then granulation process under room temperature storage were observed, while only one process was experienced by granules under refrigeration condition during the initial stage of the reactivation. According to the performance of AGS during storage and reactivation process, the result indicated that it was better to preserve AGS embedded by agar under refrigeration condition. It was found that SOUR of AGS after storage was more than 10 mgO2/（gMLSS · h）, and no obvious decrease of EPS content was detected, which suggested that granular activity and structural integrity could be maintained in a certain extent by agar embedding method. Compared with wet storage method, dry storage of AGS was realized by agar embedding method, which has practical significance for circulation of AGS.

关 键 词：好氧颗粒污泥 包埋 储存 恢复 稳定性 

分 类 号：TU992.3[建筑科学—市政工程]