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化学沉淀法处理高盐含磷废水

李晴晴,  杨彦,  席欢,  郭风,  张建峰,  阮仕平

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文章导航 > 环境工程  > 2022 >  40(5): 31-36
李欢, 杨珊, 陈建宏, 周海林. 湖南省能源消费碳排放驱动因素及趋势预测实证分析[J]. 环境工程, 2018, 36(2): 152-157. doi: 10.13205/j.hjgc.201802030
引用本文: 李晴晴, 杨彦, 席欢, 郭风, 张建峰, 阮仕平. 化学沉淀法处理高盐含磷废水[J]. 环境工程, 2022, 40(5): 31-36. doi: 10.13205/j.hjgc.202205005
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LI Qing-qing, YANG Yan, XI Huan, GUO Feng, ZHANG Jian-feng, RUAN Shi-ping. TREATMENT OF HIGH-SALINITY PHOSPHATE-CONTAINING WASTEWATER BY CHEMICAL PRECIPITATION METHOD[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 31-36. doi: 10.13205/j.hjgc.202205005
Citation: LI Qing-qing, YANG Yan, XI Huan, GUO Feng, ZHANG Jian-feng, RUAN Shi-ping. TREATMENT OF HIGH-SALINITY PHOSPHATE-CONTAINING WASTEWATER BY CHEMICAL PRECIPITATION METHOD[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(5): 31-36. doi: 10.13205/j.hjgc.202205005
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化学沉淀法处理高盐含磷废水

doi: 10.13205/j.hjgc.202205005

  • 1. 河海大学 力学与材料学院, 南京 210098;

  • 2. 南京水利科学研究院, 南京 210029;

  • 3. 江苏省非常规水源开发及利用工程技术研究中心, 南京 210000

基金项目: 

国家重点研发计划项目(2018YFC0408003)

详细信息
    作者简介:

    李晴晴(1998-),女,硕士研究生,主要研究方向为环境功能材料研发与应用。qingqinglicen@163.com

    通讯作者:

    张建峰(1978-),男,教授,主要研究方向为功能复合材料研发与应用。jfzhang@hhu.edu.cn

TREATMENT OF HIGH-SALINITY PHOSPHATE-CONTAINING WASTEWATER BY CHEMICAL PRECIPITATION METHOD

  • 1. Institute of Mechanics and Materials, Hohai University, Nanjing 210098, China;

  • 2. Nanjing Hydraulic Research Institute, Nanjing 210029, China;

  • 3. Jiangsu Engineering Research Center on Utilization of Alternative Water Resources, Nanjing 210000, China

摘要

    摘要
  • 摘要: 高盐含磷废水具有盐含量高、污染物成分复杂和生物处理难等特点。生产鸟粪石后的浓海水因添加过量的Na2HPO4及NH4HCO3等诱导剂和稀释剂,其上清液中会有PO3-4-P残留。针对其上清液磷含量超标的问题,使用化学沉淀法进行除磷实验。选用聚合氯化铝(PAC)、FeCl3、Ca (OH)2、聚丙烯酰胺(PAM)作为实验药剂,研究了反应时间、单一药剂添加量和药剂复配等因素对除磷效果的影响,筛选出2种满足出水磷含量要求(0.5 mg/L)的工艺条件。方案1:添加n (Ca)/n (P)=4.5的Ca (OH)2,处理后溶液PO3-4-P含量为0.2 mg/L;方案2:添加n (Al)∶n (P)=0.5的PAC+n (Ca)/n (P)=4.0的Ca (OH)2+0.5 g/L PAM,处理后溶液PO3-4-P含量为0.4 mg/L。综合分析,方案1操作方便,方案2有助于固液分离,二者均可以用作废水处理方案,研究结果为高盐含磷废水处理提供了一个切实可行的思路。
    Abstract: High-salinity phosphate-containing wastewater has the characteristics of high salt content, complex pollutant composition and is difficult to be treated by the biological method. The supernatant will contain some PO3-4-P after struvite production by adding excessive inducers and diluents such as Na2HPO4 and NH4HCO3 to seawater. A chemical precipitation method was applied for excessive phosphate removal. In our experiment, poly-aluminium chloride(PAC), FeCl3, Ca(OH)2 and polyacrylamide(PAM) were selected as experimental chemical reagents. The effect of reaction time, the additive amount of a single chemical reagent and a combination of chemical reagents on the phosphate removal effect were studied. Finally, two strategies were selected, which could make the phosphate content in the effluent meet the emission standard. Strategy 1:adding Ca(OH)2 with a molar ratio of Ca:P of 4.5 made the PO3-4-P content decrease to 0.2 mg/L. Strategy 2:adding Ca(OH)2 with a molar ratio of Ca:P of 4.0, PAC with a molar ratio of Al:P of 0.5, and PAM with a concentration of 0.5 g/L made PO3-4-P content decrease to 0.4 mg/L. Strategy 1 was easy to operate while strategy 2 was helpful for solid-liquid separation. Both of them can be used for the treatment of high-salinity phosphate-containing wastewater. The results provide a practical idea for the treatment of high-salinity phosphate-containing wastewater in the future.
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  • 收稿日期:  2021-04-12
  • 网络出版日期:  2022-07-02

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