A design of experiments to assess phosphorous removal and crystal properties in struvite precipitation of source separated urine using different Mg sources

被引：135

作者：

Barbosa, Sonia G. ^{[1
]}

Peixoto, Luciana ^{[1
]}

Meulman, Brendo ^{[2
]}

Alves, Maria Madalena ^{[1
]}

Pereira, Maria Alcina ^{[1
]}

机构：

[1] Univ Minho, CEB Ctr Biol Engn, Campus Gualtar, P-4710057 Braga, Portugal

[2] DeSaH BV, Pieter Zeemanstr 6, NL-8606 JR Sneek, Netherlands

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 298卷

关键词：

Human urine; Phosphorus recovery; Magnesium sources; Stirring speed; Struvite crystal size; SWINE WASTE-WATER; MAGNESIUM AMMONIUM PHOSPHATE; MICROBIAL FUEL-CELL; PROCESS PARAMETERS; ENERGY-PRODUCTION; UREA HYDROLYSIS; RECOVERY; CRYSTALLIZATION; KINETICS; NITROGEN;

D O I：

10.1016/j.cej.2016.03.148

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Phosphorus recycling and recovery has received special attention due to its non-replaceable and non renewability. Phosphorus recovery from human urine in the form of struvite crystals is a potential alternative source. In this work, the efficiency of struvite precipitation from source separated human urine and struvite crystals size were analyzed using three different Mg2+ sources (MgCl2, Mg(OH)(2) and MgO), individually evaluated using a statistical design of experiments to assess the combined effect of Mg2+:P molar ratio (1:1, 1.5:1 and 2:1) and stirring speed (30, 45 and 60 rpm). Formation of struvite crystals was confirmed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with an energy dispersive spectrometer (EDS). Using the optimal conditions determined, MgO as Mg2+ source at 2:1 molar ratio and a stirring speed of 30 rpm, 99% of P was recovered as struvite crystals with a size of 50-100 mu m. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：146 / 153

页数：8

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