Efficient nitrogen recovery from domestic wastewater through struvite precipitation: Optimizing process parameters and characterization analysis

IF 5.9 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-09-23 DOI:10.1016/j.asej.2025.103760

Raghda Hamdi , Hassimi Abu Hasan , Mohd Hafizuddin Muhamad , Nur Aisyah Nazairi

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引用次数: 0

Abstract

Recovery of nitrogen from domestic wastewater through struvite precipitation enables the circular economy with revenue generation to treatment plants. Struvite formation factors (pH, magnesium mass, and reagent type) were investigated in the present study. Struvite is formed via a reaction involving NH₄⁺-N, Mg, and P. Magnesium sources (MgCl₂, MgSO₄, MgO), pH (5–11), and magnesium mass (0.5–1.25 g) were identified using response surface methodology (RSM). The optimal condition was pH 8.53 with 1.13 g MgO, resulting in 97.0 % NH₃-N removal and 2.66 g struvite production. The quality of struvite was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR), indicating an irregular rod-shaped morphology, 12.2 nm crystalline size, and 98.9 % crystallinity. The findings highlight the necessity to enhance nitrogen recovery efficiency for large-scale wastewater treatment considering the future potential of struvite.

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鸟粪石沉淀法高效回收生活污水中的氮：工艺参数优化及表征分析

通过鸟粪石沉淀从生活废水中回收氮，使循环经济能够为处理厂带来收入。研究了鸟粪石的形成因素（pH、镁质量和试剂类型）。鸟粪石是通过NH4+-N、Mg和p的反应形成的。镁的来源（MgCl2、MgSO4、MgO）、pH（5-11）和镁的质量（0.5-1.25 g）通过响应面法（RSM）确定。最佳工艺条件为pH 8.53, MgO 1.13 g， NH3-N去除率97.0%，鸟粪石产量2.66 g。通过扫描电镜（SEM）、x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对鸟粪石的形貌进行了表征，结果表明鸟粪石呈不规则棒状，晶粒尺寸为12.2 nm，结晶度为98.9%。研究结果表明，考虑到鸟粪石的未来潜力，有必要提高大规模废水处理的氮回收效率。

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.