...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >Synergistic effects of wheat straw powder and persulfate/Fe(Ⅱ) on enhancing sludge dewaterability
【24h】

Synergistic effects of wheat straw powder and persulfate/Fe(Ⅱ) on enhancing sludge dewaterability

机译：麦草粉与过硫酸盐/铁（Ⅱ）的协同作用对提高污泥脱水能力的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of wheat straw powder (WSP) used as physical conditioner on sludge dewatering was investigated under sodium persulfate (SPS)/Fe(II) oxidation. Sludge dewatering performance in terms of capillary suction time (CST), specific resistance to filtration (SRF) and moisture content (MC) was enhanced with increasing WSP and SPS dosages. The results showed presence of synergistic effect in WSP and SPS conditioning system, with sludge CST and SRF reduced by 43.9% and 65.6%, respectively, after dosing 0.75 g/g DS (dry solid) WSP, 120 mg/g DS SPS and 33 mg/g DS Fe(II), indicating that sludge dewatering became more easily. Correspondingly, bound water was released and decreased from 5.75 g/g DS to 1.5 g/g DS and deep dewatered sludge MC reached to 58.2% under 2 MPa pressure. Mechanically, tightly bound extracellular polymeric substances (TB-EPS) with larger molecular weights were oxidized and degraded into loosely bound-EPS (LB-EPS) and soluble organic matter with smaller molecular weights by SPS/Fe(II). Additionally, the organic matters released from or still in WSP was also oxidized resulting in more channels and less fine particles. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在过硫酸钠（SPS）/ Fe（II）氧化作用下，研究了用作物理调节剂的小麦秸秆粉（WSP）对污泥脱水的影响。随着WSP和SPS剂量的增加，污泥的脱水性能在毛细管抽吸时间（CST），比过滤抗性（SRF）和水分含量（MC）方面得到增强。结果表明，在加入0.75 g / g DS（干固体）WSP，120 mg / g DS SPS和33后，在WSP和SPS调节系统中存在协同作用，污泥的CST和SRF分别降低了43.9％和65.6％。 mg / g DS Fe（II），表明污泥脱水变得更容易。相应地，结合水被释放并从5.75g / g DS降低至1.5g / g DS，并且在2MPa的压力下，深度脱水的污泥MC达到58.2％。机械上，分子量较大的紧密结合的胞外聚合物（TB-EPS）被SPS / Fe（II）氧化并降解为分子量较小的松散结合的EPS（LB-EPS）和可溶性有机物。此外，从WSP释放或仍留在WSP中的有机物也被氧化，从而导致更多的通道和更少的细颗粒。 （C）2018 Elsevier Ltd.保留所有权利。

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