2018年3月1日 · Struvite as well as struvite analogues (with substitution of monovalent cations for NH 4 + or divalent cations for Mg 2+) as well as other crystals can form simultaneously and result in changes in crystal morphology during crystal growth. This review provides the results from experimental and theoretical studies on struvite formation and ...

2019年5月21日 · Struvite was confirmed through XRD analysis of the precipitate. The main advantage of using magnesium is the recovery of P for agricultural and industrial applications. The recovered struvite could act as a slow-release fertilizer (Nelson, 2000). However, the use of magnesium salts might cause blockage of pipelines with the accumulation of ...

2022年7月1日 · The precipitated struvite can be recovered and sold as fertiliser, reducing resource depletion by replacing fossil-fuel based P (Jaffer et al., 2002; Zhang and Mo, 2013). Mavhungu et al. (2021) report that struvite precipitation could act as a fast, efficient, and environmentally friendly pre-treatment step to remove P and reduce N from wastewater.

Struvite calculi are important in dogs, cats, and ruminants. Struvite is one of the most common uroliths in cats, although during the past few decades, trends in the occurrence of struvite uroliths and calcium oxalate uroliths have shifted substantially, often in a reciprocal manner.

Struvite (MgNH 4 PO 4 6H 2 O) is a white, crystalline substance composed of magnesium, ammonium and phosphate. Struvite can precipitate under conditions where the pH is above 7.5 and magnesium (Mg 2+), ammonium (NH 4 +) and phosphate (PO 4 3−) occur in equal parts (de-Bashan and Bashan, 2004). Historically, struvite formation in WWTPs has ...

2021年10月1日 · Struvite nucleation and growth occur when the system is supersaturated, and the IAP is higher than the solubility product (K sp), returning the system to equilibrium [114]. Depending on precipitation conditions, struvite crystals may have different morphologies, but supersaturation majorly defines crystal size and morphology [127].

2025年2月1日 · Struvite crystallization has been widely studied as a waste liquid nitrogen and phosphorus recovery technology in the past 20–30 years. By adding a magnesium source to wastewater rich in phosphorus and ammonia nitrogen and adjusting the pH of the wastewater, struvite can be obtained as a phosphate fertilizer, as shown in Equation (1).

2023年10月15日 · Struvite crystallization process is an effective and sustainable approach to achieve both nutrient recovery and reuse of the precipitates in comparison with other technologies. In the struvite crystallization process, N and P can be converted into struvite with slow-release fertilizer properties for supplying in agricultural production.

2025年1月15日 · However, struvite in the crystallization stage displayed a higher purity. Meanwhile, the difference in the color of two crystals also supported that the mixture precipitation (yellow) was formed during the pretreatment stage. White crystals were struvite powder, and yellow substance in the mixture might be FeHPO 4.

2024年8月1日 · Struvite biomineralization (STB) is a promising alternative to traditional phosphorus recovery methods. Unlike abiotic methods (traditional chemical struvite recovery process) that require pH adjustment additives, STB can eliminate this need. Additionally, STB is capable of recovering phosphorus even at low concentrations (e.g. 7.5 mg/L) [77], [11]