Nitrogen and phosphorous are limiting and crucial elements for all living organisms. The recovery of nitrogen and phosphorous as struvite gained attention due to its ecofriendly fertilizer application. In the present study, feasible recovery of NH₄⁺ -N available in the landfill leachate with addition of economically viable waste resources like sewage sludge and Mg²⁺ source as struvite is investigated. However, the fertilizer application of struvite depends upon its purity, which in turn is influenced by pH, molar ratio, and presence of other ions. Laboratory scale studies are conducted to find optimum pH and molar ratio. The results of the studies demonstrated the optimum pH being 9.5 along with PO₄^3- -P: Mg²⁺: NH₄⁺ -N molar ratio of 1:1.3:1 is the best condition for struvite formation. To further augment the struvite precipitation kaolinite seed is added to the solution and optimized seed dose is 20 g/L. Existence of Ca²⁺ and Na⁺ ions in the solution exhibits a negative impact on struvite precipitation. Response surface methodology is employed to understand the interactive influence of parameters on recovery efficiency. The recovered precipitate consists of 82.5% struvite with PO₄^3- -P: Mg²⁺: NH₄⁺ -N ratio 1:1.1:0.9. Also, bioavailability of PO₄^3- -P in the recovered precipitate is 89.3%; this signifies high performance of precipitate as fertilizer. Economic assessment highlights that the struvite production is profitable and the profit gained is 159.5$/m³.

氮和磷是所有生物体的限制性元素和关键元素。氮和磷作为鸟粪石的回收因其生态友好的肥料应用而受到关注。在本研究中，研究了通过添加经济上可行的废物资源（如污水污泥和作为鸟粪石的Mg ²⁺源）回收垃圾渗滤液中可用的 NH ₄ ⁺ -N 。然而，鸟粪石的肥料应用取决于其纯度，而后者又受到 pH 值、摩尔比和其他离子的影响。进行实验室规模研究以找到最佳 pH 值和摩尔比。研究结果表明，与 PO ₄ ^3- -P: Mg ²⁺一起，最佳 pH 值为 9.5: NH ₄ ⁺ -N 摩尔比为 1:1.3:1 是鸟粪石形成的最佳条件。为了进一步增加鸟粪石沉淀，将高岭石种子添加到溶液中，优化的种子剂量为 20 g/L。溶液中Ca ²⁺和Na ⁺离子的存在对鸟粪石沉淀具有负面影响。响应面方法用于了解参数对采收率的交互影响。回收的沉淀物由 82.5% 鸟粪石组成，PO ₄ ^3- -P: Mg ²⁺ : NH ₄ ⁺ -N 比例为 1:1.1:0.9。此外，PO ₄ ^{3- 的}生物利用度回收的沉淀物中-P为89.3%；这意味着沉淀物作为肥料的高性能。经济评估显示鸟粪石生产有利可图，获得的利润为159.5$/m ³。