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Exploration of the formation of self-forming dynamic membrane in an upflow anaerobic sludge blanket reactor
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2018-11-22 , DOI: 10.1016/j.seppur.2018.11.065
Muhammad Ahmar Siddiqui , Ji Dai , Dao Guan , Guanghao Chen

Self-forming dynamic membrane bioreactor (SFDMBR) technology has drawn increased attention recently, especially for its potential application in anaerobic conditions to retain slow growing sludge in the system. To attain maximum sludge retention, quick development of a self-forming dynamic membrane (SFDM) is deemed necessary. A lab-scale upflow anaerobic sludge blanket (UASB) reactor with a side-stream anaerobic SFDMBR was used in this study to investigate the factors affecting the successful formation of a SFDM and identify the indicators of success. The SFDM formed successfully within 60 to 90 min to produce permeates of less than 10 NTU after system optimization. The short formation period and low permeate turbidity provide strong support for the potential of retaining a large amount of sludge in the UASB reactor. The thickness and wet density of the SFDM increased continuously with the decrease in surface area during the formation period. Extracellular polymeric substances (EPS) played an essential role in SFDM formation. Humic acid was the dominant EPS in the sludge, but it did not significantly affect the SFDM formation. Even though polysaccharides only represented 3.7% of the total EPS in sludge, it accumulated on the supporting material as a percentage of the total EPS increased significantly from 6.2% after 60 min to 10.8% after 720 min. Therefore, polysaccharides were the primary reason for the formation of the SFDM. β-polysaccharides were more important because it mainly accumulated on the fiber of the supporting material.



中文翻译:

上流式厌氧污泥床反应器中自形成动力膜形成的探索

自形成动态膜生物反应器(SFDMBR)技术最近引起了越来越多的关注,尤其是在厌氧条件下可将缓慢的污泥保留在系统中的潜在应用中。为了获得最大的污泥保留率,必须快速发展自形成的动态膜(SFDM)。这项研究中使用了实验室规模的带有侧流厌氧SFDMBR的上流厌氧污泥层(UASB)反应器,以研究影响SFDM成功形成的因素并确定成功指标。系统优化后,SFDM在60至90分钟内成功形成,产生的渗透物少于10 NTU。短的形成期和低的渗透浊度为在UASB反应器中保留大量污泥的潜力提供了有力的支持。在形成期间,SFDM的厚度和湿密度随着表面积的减少而连续增加。细胞外聚合物质(EPS)在SFDM的形成中起着至关重要的作用。腐殖酸是污泥中的主要EPS,但它并未显着影响SFDM的形成。即使多糖仅占污泥中总EPS的3.7%,但其在支撑材料上的积累却占总EPS的百分比从60分钟后的6.2%显着增加到720分钟后的10.8%。因此,多糖是形成SFDM的主要原因。β-多糖更重要,因为它主要聚集在支撑材料的纤维上。细胞外聚合物质(EPS)在SFDM的形成中起着至关重要的作用。腐殖酸是污泥中的主要EPS,但它并未显着影响SFDM的形成。即使多糖仅占污泥中总EPS的3.7%,但其在支撑材料上的积累却占总EPS的百分比从60分钟后的6.2%显着增加到720分钟后的10.8%。因此,多糖是形成SFDM的主要原因。β-多糖更重要,因为它主要聚集在支撑材料的纤维上。细胞外聚合物质(EPS)在SFDM的形成中起着至关重要的作用。腐殖酸是污泥中的主要EPS,但它并未显着影响SFDM的形成。即使多糖仅占污泥中总EPS的3.7%,但其在支撑材料上的积累却占总EPS的百分比从60分钟后的6.2%显着增加到720分钟后的10.8%。因此,多糖是形成SFDM的主要原因。β-多糖更重要,因为它主要聚集在支撑材料的纤维上。它在支撑材料上的累积占总EPS的百分比从60分钟后的6.2%显着增加到720分钟后的10.8%。因此,多糖是形成SFDM的主要原因。β-多糖更重要,因为它主要聚集在支撑材料的纤维上。它在支撑材料上的累积占总EPS的百分比从60分钟后的6.2%显着增加到720分钟后的10.8%。因此,多糖是形成SFDM的主要原因。β-多糖更重要,因为它主要聚集在支撑材料的纤维上。

更新日期:2018-11-22
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