不同泥龄对活性污泥絮凝特性的影响

发布时间：2018-11-15 06:30

【摘要】：为了揭示不同污泥龄活性污泥的絮凝特性及作用机制,采用序批式反应器,考察污泥龄(solid retention time,SRT)对絮体EPS(extra-micro colony polymeric substances,EMPS)和菌胶团EPS(extra-cellular polymeric substances,ECPS)2种EPS组分的影响,通过扩展的DLVO理论和EPS组分解析不同污泥龄的絮凝性能。研究结果表明,随着SRT的增大,活性污泥的相互作用能曲线存在明显的势垒和势垒值逐渐减少,EMPS和ECPS含量逐渐减少,且相对于ECPS的变化,EMPS含量随泥龄的变化更加明显,其中蛋白质与腐殖质含量逐渐降低,污泥絮凝性能变好。这表明,较高的污泥相互作用能势垒和EMPS组分含量是污泥絮凝性能低的内在机制,且EMPS中蛋白质和腐殖质含量的变化是不同污泥龄污泥絮凝性能差异的主要原因。
[Abstract]:In order to reveal the flocculation characteristics and mechanism of activated sludge at different sludge ages, a sequencing batch reactor was used to investigate the effects of sludge age (solid retention time,SRT on EPS (extra-micro colony polymeric substances,EMPS) and micelle EPS (extra-cellular polymeric substances,). The effects of ECPS) on the flocculation properties of different sludge ages were analyzed by extended DLVO theory and EPS component. The results showed that with the increase of SRT, the interaction energy curve of activated sludge decreased obviously, the content of EMPS and ECPS decreased gradually, and the content of EMPS changed more obviously with the age of sludge compared with the change of ECPS. The content of protein and humus decreased gradually, and the flocculation performance of sludge became better. The results showed that the high interaction energy barrier and the content of EMPS were the internal mechanism of sludge flocculation, and the change of protein and humus content in EMPS was the main reason for the difference of flocculation performance of sludge at different ages.
【作者单位】：上海理工大学环境与建筑学院;同济大学环境科学与工程学院;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07313-001,2013ZX07314-003) 国家高技术研究发展计划(863)项目(2012AA063303) “十二五”国家科技支撑计划项目(2014BAC29B01) 国家自然科学基金资助项目(51578397,51279108) 上海大学生创新创业训练计划项目(SH2017127) 上海市科委基础研究重大项目(13DJ1400105) 国家重点研发计划项目(2016YFC0402504)
【分类号】：X703

【相似文献】