摘要
利用弹性填料附着生物膜,在选择压法培养好氧颗粒污泥(AGS)的过程中研究人工刮膜使其进入混合液对好氧颗粒化进程的影响。前23 d内颗粒化率随着生物膜刮落进入混合液中而不断增加,24 d后将弹性填料上附着的生物膜全部刮入混合液中,颗粒化率大幅度提高。游离态生物膜在颗粒化过程中发挥了前驱物或晶核作用,而在较高水力选择压下微生物分泌的胞外聚合物促进了松散的生物膜转化为结构密实的AGS,因而在冬季较低温度下于30 d内成功实现了好氧颗粒化。弹性填料有效地提高了系统的稳定性,即使选择压法操作不当时仍可以抵抗污泥膨胀造成的影响,这一设置有效地降低了系统崩溃的风险。运行过程中反应器表现出较好的污染物去除效果,对COD、TIN及TP的去除率常在90%、82%及80%以上。
The strategy that attached biofilm was scrapped into mixed liquor during cuhivation of aerobic granular sludge （AGS） by selection pressure method, and its influence on the granulation process was explored. The proportion of granules increased along with attached biofilm scrapped into the mixed liquor during the first 23 days, and granulation rate increased quickly after the elastic filler was removed, which left a large amount of free biofilm scrapped into the mixed liquor from the 24th day. The result indicated that free biofilm played the role of precursor and nuclei in the formation of AGS, where the extra- cellular polymeric substances network facilitated the conversion of loose biofilm into compact AGS by high selection pressure. Therefore, AGS was cultivated within 30 days at low temperature in winter by the strategy. The existence of elastic filler greatly enhanced the stability of the system to resist sludge bulking, which reduced the risk of startup failure even if operational parameter was improperly controlled by selection pressure method. Good performance of the reactor was achieved, where removal rates of COD,TIN and TP were usually more than 90%, 82% and 80% during the operation.
出处
《中国给水排水》
CAS
CSCD
北大核心
2018年第1期14-19,共6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业训练计划项目(XZG-16-08-08)
关键词
好氧颗粒污泥
生物膜
颗粒化
弹性填料
稳定性
aerobic granular sludge
biofilm
granulation
elastic filler
stability
