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首页> 外文期刊>Environmental Science & Technology >Nitrogen and Phosphorus Harvesting from Human Urine Using a Stripping, Absorption, and Precipitation Process
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Nitrogen and Phosphorus Harvesting from Human Urine Using a Stripping, Absorption, and Precipitation Process

机译：使用剥离，吸收和沉淀过程从人尿中收获氮和磷

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摘要

Human urine contains significant amounts of Ν (nitrogen) and Ρ (phosphorus); therefore it has been successfully used as fertilizer in different crops. But the use of urine as fertilizer has several constraints, such as, the high cost of transportation, an unpleasant smell, the risk of pathogens, and pharmaceutical residue. A combined and improved Ν stripping and Ρ precipitation technique is used in this study. In this technique, Ca(OH)~2 is used to increase the pH of urine which converts ammonium into ammonia gas and precipitate Ρ as Ca-P compound. The ammonia gas is stripped and passed into the sulfuric acid where ammonium sulfate and hydrogen triammo-nium disulfate is formed. The experiment was performed using 700 mL of urine and the pH of the urine was increased above 12. Our results showed that 85-99% of Ν and 99% of Ρ (w/w) can be harvested from urine in 28 h at 40 °C and in 32 h at 30 °C. The harvested Ν (13% Ν w/w) and Ρ (1.5% Ρ w/w) can be used as mineral fertilizer. The economic assessment of the technique showed that the extraction of Ν and Ρ from 1 m~3 of pure urine can make a profit of €2.25.
机译：人尿中含有大量的N（氮）和P（磷）。因此，它已成功地用作不同农作物的肥料。但是使用尿液作为肥料有一些限制，例如运输成本高，气味难闻，病原体风险和药物残留。在这项研究中使用了结合的和改进的Ｎ汽提和Ｐ沉淀技术。在该技术中，使用Ca（OH）〜2来提高尿液的pH，从而将铵转化为氨气并沉淀出Ca-P化合物。汽提氨气，并通入硫酸，在硫酸中形成硫酸铵和三硫酸氢铵。使用700 mL尿液进行了实验，尿液的pH值增加到12以上。我们的结果表明，在40 h的28小时内可以从尿液中收获85-99％的N和99％的Ρ（w / w） °C和30°C下32小时。所收获的N（13％N w / w）和P（1.5％P w / w）可以用作矿物肥料。该技术的经济评估表明，从1 m〜3的纯尿中提取N和P可获得2.25欧元的利润。

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  • 来源
    《Environmental Science & Technology》 |2017年第9期|5165-5171|共7页
  • 作者

    Surendra K. Pradhan; Anna Mikola; Riku Vahala;

  • 作者单位

    Department of Built Environment, School of Engineering, Aalto University, P.O. Box 14100 FI-00076 AALTO, Finland;

    Department of Built Environment, School of Engineering, Aalto University, P.O. Box 14100 FI-00076 AALTO, Finland;

    Department of Built Environment, School of Engineering, Aalto University, P.O. Box 14100 FI-00076 AALTO, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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