Lucero-Sorbazo Deborah, Beltrán-Villavicencio Margarita, González-Aragón Abelardo, Vázquez-Morillas Alethia
CAABSA Eagle, Morelos 2151, Col. Ladrón de Guevara, Guadalajara 44600, Mexico.
Universidad Autónoma Metropolitana - Unidad Azcapotzalco, San Pablo 180, Col. Reynosa Tamaulipas, Azcapotzalco, Mexico City 02200, Mexico.
Heliyon. 2022 May 25;8(5):e09540. doi: 10.1016/j.heliyon.2022.e09540. eCollection 2022 May.
The continuous increase in the consumption of natural resources requires different solutions directed to the recovery and recycling of different materials and products, including the nutrients used as fertilizers for food production. In this context, this research assessed the feasibility of using landfill leachate as a source of nutrients for the growth of maize. Leachate was treated to precipitate struvite, a rich magnesium, phosphate, and ammonium mineral that can be applied directly as fertilizer. It was used for the growth of maize, which was sowed in three different parcels. A commercial DAP + urea mixture was used to compare, and non-fertilized parcels were used as controls. Struvite was successfully obtained and applied in the fields. A marginal higher maize yield was achieved in two sites when using struvite (6.36% and 2.16%) compared to the commercial fertilizer, even if it was applied in a lower dose to weather conditions. An increase in N and Mg in soil could be observed, which allowed for the assimilation of nutrients in the plants. Concerning safety, the use of struvite did not produce the transfer of heavy metals or pathogens to the soil or plants. This research shows a promising way of dealing with leachate, which could be attractive in countries where organic waste is buried in landfills.
自然资源消耗的持续增加需要针对不同材料和产品的回收利用采取不同的解决方案，包括用作粮食生产肥料的养分。在此背景下，本研究评估了将垃圾渗滤液用作玉米生长养分来源的可行性。对渗滤液进行处理以沉淀鸟粪石，这是一种富含镁、磷和铵的矿物质，可直接用作肥料。它被用于种植玉米，玉米播种在三个不同的地块中。使用商业磷酸二铵+尿素混合物进行比较，并将未施肥的地块用作对照。成功获得了鸟粪石并将其应用于田间。与商业肥料相比，在两个地点使用鸟粪石时玉米产量略有提高（分别为6.36%和2.16%），尽管由于天气条件，鸟粪石的施用量较低。可以观察到土壤中氮和镁的增加，这有利于植物对养分的吸收。关于安全性，使用鸟粪石不会导致重金属或病原体转移到土壤或植物中。这项研究展示了一种处理渗滤液的有前景的方法，在有机废物填埋的国家可能具有吸引力。
