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首页> 外文期刊>Journal of Cleaner Production >An integrated process of chemical precipitation and sulfate reduction for treatment of flue gas desulphurization wastewater from coal-fired power plant
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An integrated process of chemical precipitation and sulfate reduction for treatment of flue gas desulphurization wastewater from coal-fired power plant

机译：化学沉淀和硫酸盐降低的综合方法，治疗燃煤发电厂烟道气脱硫废水

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摘要

Flue gas desulphurization process in coal-fired power plants, produces wastewater with concentrated sulfate, chloride, metals and refractory organic compounds, which leads to serious pollution and corrosion problem during recycling. In this study, an integrated process of chemical precipitation and sulfate reduction for treatment of coal-fired power plant flue gas desulphurization wastewater was developed. Without additional of heavy metal trapping and strong oxidizing agents, chemical precipitation was performed as pre-treatment for removal of suspended solid (97%) in raw flue gas desulphurization wastewater. Comparison study on treatment of pre-treated flue gas desulphurization wastewater were performed in three parallelly operated sequencing batch reactors, by cultured sulfate reducing bacteria strain BY7, SR10 and SR3, respectively. This study demonstrated that strain BY7 and SR10 sulfate reducing bacteria were able to adapted to high-salinity flue gas desulphurization wastewater, with high efficiencies of sulfate reduction (86-94%), metals (70-100%) and refractory organic compounds removal (85-95%). The highest sulfate loading rate of 0.5 kg SO42--/m(3)-d was achieved in sequencing batch reactors with strain BY7 and SR10. Besides, a sustainable removal of chloride and fluoride were achieved (about 35% and 55%, respectively), which probably relate to co-precipitation or biosorption processes. Up to 14 out of 25 refractory organic compounds in flue gas desulphurization wastewater could be completely removed after integrated treatment process. As response to flue gas desulphurization wastewater stress, abundance of monounsaturated fatty acids were increased, and upregulated expression of genes related to salt detoxification were observed in SBR_BY7 and SBR_SR10. Therefore, this study provided a potential low-cost flue gas desulphurization wastewater recycling technology with simultaneously removal of sulfate, refractory organic compounds, heavy metal and salts. (C) 2019 Elsevier Ltd. All rights reserved.
机译：燃煤发电厂中的烟气脱硫过程，产生浓硫酸盐，氯化物，金属和耐火有机化合物的废水，这导致回收过程中的严重污染和腐蚀问题。在该研究中，开发了一种用于处理燃煤发电厂烟气脱硫废水的化学沉淀和硫酸盐降低的综合方法。无需额外的重金属捕获和强氧化剂，将化学沉淀作为预处理进行，以除去原料烟道气脱硫废水中的悬浮固体（97％）。通过培养的硫酸盐还原细菌菌株培养7，SR10和SR3，在三次平行操作的测序批量反应器中进行对预处理的烟道气脱硫废水的比较研究。本研究证明，菌株BY7和SR10硫酸盐还原细菌能够适应高盐度烟道气脱硫废水，其硫酸盐降低高（86-94％），金属（70-100％）和耐火有机化合物去除（ 85-95％）。在用菌株BY7和SR10测序批量反应器中实现了0.5kg SO42 - / m（3）-d的最高硫酸盐加载速率。此外，实现了可持续除去氯化物和氟化物（分别为约35％和55％），其与共沉淀或生物吸附过程有关。在整合处理过程后，烟道气脱硫废水中最多14个耐火气体脱硫废水中可以完全除去。由于响应烟道气脱硫废水胁迫，在SBR_By7和SBR_SR10中观察到富含单不饱和脂肪酸的丰度，并在SBR_By7和SBR_SR10中观察到与盐排毒有关的基因的上调表达。因此，该研究提供了潜在的低成本烟气脱硫废水废水再循环技术，同时除去硫酸盐，耐火有机化合物，重金属和盐。 （c）2019 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Journal of Cleaner Production》 |2019年第10期|63-72|共10页
  • 作者

    Yan Jia; Yuan Wenhuan; Liu Jian; Ye Weizhuo; Lin Jinlan; Xie Jiahao; Huang Xuan; Gao Shanshan; Xie Jiehui; Liu Shinian; Chen Wenzhong; Zhang Hongguo;

  • 作者单位

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China|Guangzhou Univ Guangzhou Univ Linkoping Univ Res Ctr Urban Susta Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangdong Diankeyuan Energy Technol Co Ltd Guangzhou 510006 Guangdong Peoples R China;

    Zhan Jiang Zhong Yue Energy Co Ltd Zhanjiang 524033 Peoples R China;

    Guangzhou Univ Sch Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China|Guangzhou Univ Guangzhou Univ Linkoping Univ Res Ctr Urban Susta Guangzhou 510006 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Flue gas desulphurization wastewater; Sulfate reduction; Metal removal; Refractory organics removal; Wastewater recycling;

    机译：烟气脱硫废水;减少硫酸盐;金属去除;耐火有机物去除;废水回收;

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