• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Significantly enhanced dewatering performance of drinking water sludge from a coagulation process using a novel chitosan–aluminum chloride composite coagulant in the treatment of cyanobacteria-laden source water
【24h】

Significantly enhanced dewatering performance of drinking water sludge from a coagulation process using a novel chitosan–aluminum chloride composite coagulant in the treatment of cyanobacteria-laden source water

机译：用新型壳聚糖 - 氯化铝复合凝血剂在凝血过程中饮用水污泥的脱水性能显着提高了凝血过程中的Cyanobacteria-Ladens源水

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The enhanced dewatering performance and the fate of cyanobacterial cells in the filtration of cyanobacteria-laden sludge, generated by a coagulation process using a novel composite chitosan–aluminum chloride (CTSAC) coagulant, were systemically studied. Two other cyanobacteria-laden sludge, aluminum chloride (AC) sludge and chitosan (CTS) sludge, were also studied to compare dewater performance with CTSAC sludge. Results showed that the dewatering process did not cause cell lysis and microcystins (MCs) release. The level of MCs and extracellular organic matter (EOM) in the filtrate were decreased by adsorption and sieving onto the cake layer formed on the membrane, but dewatering at high vacuum pressure reduced the rejection efficiency. The sludge from the coagulation process using the CTSAC composite displayed better sludge dewaterability and obtained a better quality of filtrate (fewer MCs and EOM) than those from AC and CTS coagulation processes independently. A three-dimensional excitation–emission matrix (EEM) fluorescence measurement indicated that protein-like substances in soluble extracellular polymeric substances (EPS) played a negative role on cyanobacteria-laden sludge dewatering. In addition, CTSAC sludge showed a more compact structure and larger floc sizes than AC sludge and CTS sludge for a strong improvement in the charge neutralization and bridge ability of AC by combining CTS in the composite coagulant. It was further observed that floc size played a more significant role on sludge dewaterability than the degree of compactness. Overall, the preferable dewater performance of CTSAC sludge demonstrated the CTSAC composite coagulant has great potential for the treatment of cyanobacteria-laden source water.
机译：通过使用新型复合壳聚糖 - 氯化铝（CTSAC）凝结剂的凝固方法，增强脱水性能和蓝藻细胞的命运在裂缝中的过滤中，通过使用新型复合壳聚糖 - 氯化铝（CTTSAC）凝结剂产生。还研究了另外两种Cyanobacteria-Laden污泥，氯化铝（AC）污泥和壳聚糖（CTS）污泥，以将脱水性能与CTTSAC污泥进行比较。结果表明，脱水过程没有引起细胞裂解和微囊藻（MCS）释放。通过吸附和筛分在膜上形成的滤饼层上筛选滤液中MCS和细胞外有机物质（EOM）的水平，但在高真空压力下脱水降低了排斥效率。使用CTSAC复合材料的凝固方法的污泥显示出更好的污泥脱水性，并获得比来自AC和CTS凝固过程的更好的滤液质量（更少的MCS和EOM）。三维激发发射矩阵（EEM）荧光测量表明，可溶性细胞外聚合物物质（EPS）中的蛋白质物质在蓝藻污泥脱水中发挥了负面作用。此外，CTSAC污泥显示出比AC污泥和CTS污泥更紧凑的结构和较大的絮凝机，通过组合复合凝固剂中的CT来强大地改善AC的电荷中和和桥接能力。进一步观察到，絮状尺寸在污泥脱水性上发挥了更大的作用，而不是紧凑性。总体而言，CTTSAC污泥的优选脱水性​​能证明了CTSAC复合凝固物具有巨大的潜力，用于治疗蓝杆菌源水。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号