通过合成尿液中的共沉影响K-struvite纯度的因素:验证,量化和建模
Lin Wei1, Yiming Tang1, Tingting Zhang1
1School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China; Key Laboratory of Nanominerals and Pollution Control of Higher Education Institutes, Hefei University of Technology, Hefei, 230009, China.
Environmental research
|November 11, 2024
概括
这项研究研究了合成尿中的共沉降,以改善用于肥料生产的K-struvite纯度. 优化pH值和 (Mg2+) 度可以减轻氨的含量.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 尿液含有高度的 (N), (P) 和 (K),这可能导致共降.
- 这种共同降水对K-struvite的纯度产生不利影响,K-struvite是缓释肥料中宝贵的化合物.
- 了解影响K-struvite纯度的因素对于有效从尿液中恢复营养素至关重要.
研究的目的:
- 为了研究残留氨 (NH4+) 度,pH值和初始 (Mg2+) 度对合成尿液中共沉降的影响.
- 开发和应用一个反向传播的人工神经网络 (BPANN) 模型来模拟和预测晶体纯度.
- 确定最佳的操作参数,以提高肥料应用中的K-struvite纯度.
主要方法:
- 实验使用合成尿液进行,其度的NH4+,pH和初始Mg2+的度各不相同.
- 分析了共同沉物以确定K-struvite,struvite,hydroxyapatite和cattiite的纯度.
- 一个反向传播的人工神经网络 (BPANN) 模型被开发来模拟和预测晶体纯度.
主要成果:
- K-struvite,struvite,hydroxyapatite和cattiite是共沉积物中占主导地位的水晶.
- 卡蒂石的纯度高度依赖于Mg2+度,在50 mmol/L时显著增加.
- 增加的NH4+度降低了K-struvite的纯度,而调整pH和Mg2+度减轻了这种抑制. BPANN模型准确地预测了晶体的纯度.
结论:
- 优化pH值和初始Mg2+度是减轻残留NH4+对K-struvite结晶的抑制作用的有效策略.
- 开发的BPANN模型可以准确预测晶体纯度,并确定K-struvite生产的最佳参数.
- 这项研究为从尿液中生产缓释NPK肥料提供了一条途径,并提供了从废物流中恢复营养的见解.
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