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The potential and the impact factors for phosphorus recovery from wastewater via struvite precipitation

Erick K. MUTAI WANG Xuan MA Lin

ErickK. Mutai, 王选, 马林. 养殖废水中磷鸟粪石结晶法回收潜力及影响因子研究[J]. 中国生态农业学报(中英文), 2022, 30(8): 1346-1354. doi: 10.12357/cjea.20210764
引用本文: ErickK. Mutai, 王选, 马林. 养殖废水中磷鸟粪石结晶法回收潜力及影响因子研究[J]. 中国生态农业学报(中英文), 2022, 30(8): 1346-1354. doi: 10.12357/cjea.20210764
MUTAI E K, WANG X, MA L. The potential and the impact factors for phosphorus recovery from wastewater via struvite precipitation[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1346−1354 doi: 10.12357/cjea.20210764
Citation: MUTAI E K, WANG X, MA L. The potential and the impact factors for phosphorus recovery from wastewater via struvite precipitation[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1346−1354 doi: 10.12357/cjea.20210764

养殖废水中磷鸟粪石结晶法回收潜力及影响因子研究

doi: 10.12357/cjea.20210764
详细信息
  • 中图分类号: X713

The potential and the impact factors for phosphorus recovery from wastewater via struvite precipitation

Funds: The study was supported by the National Natural Science Foundation of China (31872403), the Science and Technology Program of Hebei Province (20327301D), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA28030302), the Youth Innovation Promotion Association of Chinese Academy of Sciences (2021095), and Hebei Dairy Cattle Innovation Team of Modern Agroindustry Technology Research System (HBCT2018120206).
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  • 摘要: 磷作为生命所必需的营养物质因其不可再生性、资源消耗和浪费导致的环境水体富营养化而引起人们的广泛关注。大量研究通过鸟粪石结晶技术从无机合成废水和真实废水中进行磷素回收, 降低水体富营养化风险, 并形成磷酸镁铵肥料。然而, 鸟粪石结晶过程只涉及无机磷, 而真实废水中有机磷含量高达总磷的30%~40%, 导致鸟粪石结晶技术在实际应用中磷素回收率变异极大。目前, 鸟粪石结晶法在真实废水与无机合成废水中磷回收率差距的量化分析缺乏, 导致差异产生的机制和影响因子不明。本研究从103篇文献中收集了1186项观测数据, 定量分析了在真实废水与无机合成废水中鸟粪石结晶磷回收率, 解析了磷回收差距的潜在影响因子。结果表明, 鸟粪石结晶法对无机合成废水中总磷的去除率(83.6%)高于真实废水(76.9%)。在真实废水中, 鸟粪石结晶对pH和钙等外来离子更敏感, 导致其总磷去除率变异较大, 在20.4%和99.9%之间。镁离子和钙离子是影响鸟粪石结晶的重要因子, 当Mg∶P比在1和2之间时, 镁离子对鸟粪石结晶有积极的影响, 而钙离子的存在对鸟粪石的形成有抑制作用。磷结晶沉淀作为一种非生物过程, 有机磷矿化是总磷回收的限制因素。因此, 曝气在有机磷矿化过程中起着重要作用, 额外提供6 L∙min−1的曝气流量有利于提高总磷和无机磷的回收率。提高镁磷比并不是提高磷回收率的关键因素, 但对鸟粪石的组成和纯度具有显著影响。
  • Figure  1.  Recovery rates of different P species from both real and synthetic wastewater

    TP: total P; IP: inorganic P; OP: organic P.

    Figure  2.  Impacts of pH on P recovery rates from both real and synthetic wastewater

    Figure  3.  Effect of mole ratios of Mg∶P (a) and Ca∶P (b) on P recovery rate from both real and synthetic wastewater

    Figure  4.  Impact of mechanical agitation speed on P recovery rate from both real and synthetic wastewater

    Figure  5.  Impact of aeration rate on the recovery of both total P (TP) and inorganic P (IP).

    Figure  6.  Relationship between total P (TP) removal and total organic matter (TOM) in swine wastewater

    Table  1.   Distribution of P species and other constituents in livestock slurry and liquid waste

    Waste typepHTotal solid
    suspension (g∙L−1)
    Chemical oxygen
    demand (g∙L−1)
    Inorganic
    P (mg∙L−1)
    Organic
    P (mg∙L−1)
    Total P
    (mg∙L−1)
    Mean±SDnMean±SDnMean±SDnMean±SDnMean±SDnMean±SDn
    Swine slurry7.80±0.37117.76±4.70710.44±9.5011 65.0±47.011243.0±158.09249.0±175.011
    Swine liquid9.30±1.301121.02±0.6254.20±0.9535 36.2±27.344112.5±336.710363.8±501.882
    Dairy slurry8.10±0.0724.20±0.202NRNR1677.0±40.02216.0±245.021719.0±205.02
    Dairy liquid8.11±1.0770.94±0.1320.89±0.122 393.4±432.8887.4±140.88480.8±540.58
      NR: not recorded; SD: standard deviation; n: number of samples.
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出版历程
  • 收稿日期:  2021-11-08
  • 录用日期:  2022-02-18
  • 网络出版日期:  2022-03-23
  • 刊出日期:  2022-08-01

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