晶种对磷回收效率的影响及其产物分析

刘雪瑜; 林郁; 王方舟; 颜秉斐; 肖书虎; 魏东洋

doi:10.13205/j.hjgc.202002011

晶种对磷回收效率的影响及其产物分析

doi: 10.13205/j.hjgc.202002011

1. 中国环境科学研究院水环境研究所, 北京 100012;
2. 中国地质大学(北京)水资源与环境学院, 北京 100083;
3. 生态环境部华南环境研究所, 广州 510655

基金项目:

中央级公益性科研院所基本科研业务专项（2016YSKY-028）；国家自然科学基金（51878049）。

详细信息

作者简介:
刘雪瑜(1981-),女。liuxueyu@craes.org.cn

通讯作者:
肖书虎,xiaosh@craes.org.cn

魏东洋,waterwdy@163.com

计量
- 文章访问数: 126
- HTML全文浏览量: 16
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2019-01-28

STUDY ON PHOSPHORUS RECOVERY EFFICIENCY USING THREE CRYSTAL SEEDS AND THE PRODUCTS

1. Research institution of water Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China;
3. South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China

摘要

摘要: 以CaO、MgO和白云石石灰（D-Lime）为晶种对模拟厌氧消化上清液进行磷回收试验，研究晶种投加量对磷去除效率的影响，分析试验反应动力学和产物表面形态。结果表明：磷浓度为0.645 mmol/L（ρ（P）=20 mg/L）、n（N）/n（P）为8：1、pH为7.80的模拟水中，投加一定量的CaO、MgO和D-Lime进行磷回收试验，磷的去除率在95%以上，试验反应过程符合准一级反应动力学。针对消化上清液中的高浓度常见离子CO₃^2-，当c（CO₃^2-）≥ 10 mmol/L时，其对CaO除磷具有明显抑制作用，而对D-Lime和MgO抑制作用有限。此外，投加晶种中含有Mg²⁺时会生成磷酸铵镁晶体（magnesium ammonium phosphate，MAP）。
- 磷回收 /
- 晶种 /
- 化学沉淀法 /
- 动力学
Abstract: Removal and recovery of phosphate from simulated supernatant of sewage sludge anaerobic digestion effluent were compared using CaO, MgO and dolemite lime(D-Lime)as the crystal seeds respectively, and the kinetics and the surface morphology of the products were analyzed. The results indicated that the removal rate of phosphate were all over 95% using the three crystal, seeds with the condition of initial phosphorus concentration of 0.645 mmol/L, molar ratio of nitrogen to phosphorus of 8:1, and pH value of 7.80. The phosphorus recovery resction was subject to the first order model. However, The high concentration of CO₃^2- significantly inhibited the phosphorus removal rate while the CaO was used, but the decline of phosphorus removal rate were limited when the crystal seed was MgO or D-Lime. Moreover, the experimental results also demonstrated that MAP crystals could be obtained in the presence of crystal seed containing Mg²⁺.
- phosphorus recovery /
- crystal seed /
- chemical precipitation /
- kinetics

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