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硫化物废水形成生物脱硫污泥中单质硫的回收

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计云鹤, 冯守帅, 陈金才, 詹晓, 杨海麟. 硫化物废水形成生物脱硫污泥中单质硫的回收[J]. 环境工程学报, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
引用本文: 计云鹤, 冯守帅, 陈金才, 詹晓, 杨海麟. 硫化物废水形成生物脱硫污泥中单质硫的回收[J]. 环境工程学报, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
shu
Ji Yunhe, Feng Shoushuai, Chen Jincai, Zhan Xiao, Yang Hailin. Recovery of elemental sulfur from biodesulfurization waste sludge generated from wastewater containing sulfide[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
Citation: Ji Yunhe, Feng Shoushuai, Chen Jincai, Zhan Xiao, Yang Hailin. Recovery of elemental sulfur from biodesulfurization waste sludge generated from wastewater containing sulfide[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
shu

硫化物废水形成生物脱硫污泥中单质硫的回收

  • 1.

    江南大学生物工程学院教育部工业微生物技术重点实验室, 无锡 214122

  • 基金项目:

    江苏省2014年度普通高校研究生科研创新计划项目(SJZZ_0153)

  • 中图分类号: X703.1

Recovery of elemental sulfur from biodesulfurization waste sludge generated from wastewater containing sulfide

  • 1.

    Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China

  • Fund Project:

  • 摘要: 针对生物脱硫污泥中单质硫回收困难的问题,以生物脱硫系统产生的污泥为实验对象,研究了生物硫污泥的特性。经过测定得到了如下结果:生物脱硫污泥中单质硫的含量为51.2%,蛋白质5%、Na+ 8.32%、Ka+ 7.47%、Mg2+ 4.82%、SO42-10.5%、Cl-4.45%和灰分8.24%,单质硫被带电聚合物所包裹。根据污泥的特性,设计了一套高温溶解-低温析出的单质硫回收工艺。生物硫污泥和萃取剂(甲苯/四氯乙烯=5/95)在80℃下萃取30 min,萃取剂的用量为20 mL/g生物硫污泥,萃取完成后高温过滤,滤液在4℃下过夜保存,再次过滤析出的单质硫晶体。单质硫的回收率为91.2%,析出的单质硫纯度可达98%,可以直接用于其他工业。萃取剂重复使用5次后单质硫的回收率仍可达到79.6%。结果表明,高温溶解-低温析出法可有效从含硫化合物产生的生物硫污泥中提取单质硫。
    Abstract: It is difficult to recover elemental sulfur from biodesulfurization waste sludge. The characteristics of waste sludge gathered from a biodesulfurization system were studied. The results indicated that the sludge contained 51.2% elemental sulfur, 5% protein, 8.32% Na+, 7.47% K+, 4.82% Mg2+, 10.5% SO42-, 4.45% Cl-, and 8.24% dust. The elemental sulfur was surrounded by a polyelectrolyte. This paper describes the development of a process largely comprised of two unit operations, viz. high-temperature perchloroethylene extraction and low-temperature sulfur recrystallization. The sulfur was extracted using a toluene/perchloroethylene mixed solution (5/95) at 80℃ for 30 min and the amount of extraction solvent was 20 mL/g sludge. Subsequently, the sulfur was separated from the sludge by filtration at high temperatures and the filtrate was stored overnight at 4℃; elemental sulfur was then recovered from the solution by recrystallization and centrifugation. The recovery efficiency and purity of the recovered elemental sulfur were 91.2% and 98%, respectively. Thus, the recovered sulfur can be directly used in many industries. The sulfur recovery efficiency was 79.6% even after the solution was reused five times. Thus, it was concluded that this method, involving high-temperature perchloroethylene extraction and low-temperature sulfur recrystallization, was effective for recovering elemental sulfur from the biodesulfurization waste sludge.
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  • 收稿日期:  2015-01-29
  • 刊出日期:  2016-06-03
计云鹤, 冯守帅, 陈金才, 詹晓, 杨海麟. 硫化物废水形成生物脱硫污泥中单质硫的回收[J]. 环境工程学报, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
引用本文: 计云鹤, 冯守帅, 陈金才, 詹晓, 杨海麟. 硫化物废水形成生物脱硫污泥中单质硫的回收[J]. 环境工程学报, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
shu
Ji Yunhe, Feng Shoushuai, Chen Jincai, Zhan Xiao, Yang Hailin. Recovery of elemental sulfur from biodesulfurization waste sludge generated from wastewater containing sulfide[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
Citation: Ji Yunhe, Feng Shoushuai, Chen Jincai, Zhan Xiao, Yang Hailin. Recovery of elemental sulfur from biodesulfurization waste sludge generated from wastewater containing sulfide[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2969-2974. doi: 10.12030/j.cjee.201501075
shu

硫化物废水形成生物脱硫污泥中单质硫的回收

  • 1. 江南大学生物工程学院教育部工业微生物技术重点实验室, 无锡 214122
  • 收稿日期:  2015-01-29
基金项目:

江苏省2014年度普通高校研究生科研创新计划项目(SJZZ_0153)

摘要: 针对生物脱硫污泥中单质硫回收困难的问题,以生物脱硫系统产生的污泥为实验对象,研究了生物硫污泥的特性。经过测定得到了如下结果:生物脱硫污泥中单质硫的含量为51.2%,蛋白质5%、Na+ 8.32%、Ka+ 7.47%、Mg2+ 4.82%、SO42-10.5%、Cl-4.45%和灰分8.24%,单质硫被带电聚合物所包裹。根据污泥的特性,设计了一套高温溶解-低温析出的单质硫回收工艺。生物硫污泥和萃取剂(甲苯/四氯乙烯=5/95)在80℃下萃取30 min,萃取剂的用量为20 mL/g生物硫污泥,萃取完成后高温过滤,滤液在4℃下过夜保存,再次过滤析出的单质硫晶体。单质硫的回收率为91.2%,析出的单质硫纯度可达98%,可以直接用于其他工业。萃取剂重复使用5次后单质硫的回收率仍可达到79.6%。结果表明,高温溶解-低温析出法可有效从含硫化合物产生的生物硫污泥中提取单质硫。

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