INVESTIGATION OF FACTORS INFLUENCING THE RECOVERY OF PHOSPHORUS FROM SWINE WASTEWATER BY HAP CRYSTALLIZATION BASED ON SPENT FOAM CONCRETE

ZHU Jiaming; HE Yuecheng; LONG Dingbiao; HUANG Qian; XU Wenlai; PU Shihua; JIAN Yue

doi:10.13205/j.hjgc.202308001

Volume 41 Issue 8

Aug. 2023

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ZHU Jiaming, HE Yuecheng, LONG Dingbiao, HUANG Qian, XU Wenlai, PU Shihua, JIAN Yue. INVESTIGATION OF FACTORS INFLUENCING THE RECOVERY OF PHOSPHORUS FROM SWINE WASTEWATER BY HAP CRYSTALLIZATION BASED ON SPENT FOAM CONCRETE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 1-7,17. doi: 10.13205/j.hjgc.202308001

Citation:

ZHU Jiaming, HE Yuecheng, LONG Dingbiao, HUANG Qian, XU Wenlai, PU Shihua, JIAN Yue. INVESTIGATION OF FACTORS INFLUENCING THE RECOVERY OF PHOSPHORUS FROM SWINE WASTEWATER BY HAP CRYSTALLIZATION BASED ON SPENT FOAM CONCRETE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 1-7,17. doi: 10.13205/j.hjgc.202308001

Citation:

ZHU Jiaming, HE Yuecheng, LONG Dingbiao, HUANG Qian, XU Wenlai, PU Shihua, JIAN Yue. INVESTIGATION OF FACTORS INFLUENCING THE RECOVERY OF PHOSPHORUS FROM SWINE WASTEWATER BY HAP CRYSTALLIZATION BASED ON SPENT FOAM CONCRETE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 1-7,17. doi: 10.13205/j.hjgc.202308001

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INVESTIGATION OF FACTORS INFLUENCING THE RECOVERY OF PHOSPHORUS FROM SWINE WASTEWATER BY HAP CRYSTALLIZATION BASED ON SPENT FOAM CONCRETE

doi: 10.13205/j.hjgc.202308001

ZHU Jiaming^1,2,
HE Yuecheng^1,2,3,
LONG Dingbiao^1,2,
HUANG Qian³,
XU Wenlai³,
PU Shihua^{1,2
,},
JIAN Yue^{1,2
,}

1. Chongqing Academy of Animal Sciences, Chongqing 402460, China;
2. National Center of Technology Innovation for Pigs, Chongqing 402460, China;
3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610066, China

Received Date: 2022-08-17
Available Online: 2023-11-15

Abstract

Abstract

The effect of three factors [pH, n(Ca²⁺)/n(PO₄^3-), and temperature] on the phosphorus recovery treatment process using waste foam concrete as the Ca source was investigated using the calcium hydroxyphosphate (HAP) crystallization method to recover phosphorus from simulated swine wastewater. The optimal reaction conditions were obtained using Box-Behnken (BBD) and combined with the Visual MINETEQ model to explore the individual and combined effects of 2 typical heavy metals (Cu²⁺、Zn²⁺) on the HAP crystallization system. The results showed that the optimal reaction conditions were pH=9.37, n(Ca²⁺)/n(PO₄^3-)=1.669, temperature=25.46 ℃; the effect of Cu²⁺ on HAP crystallization was greater than that of Zn²⁺, and the inhibitory effect of Cu²⁺ and Zn²⁺ was enhanced when combined with the injection; Scanning electron microscopy (SEM) showed that the introduction of heavy metals changed the HAP surface structure and occupied the active sites, and energy dispersive X-ray spectroscopy (EDS) showed that Cu and Zn entered the crystalline products at 9.79% and 9.88% mass ratios, respectively; Visual MINTEQ simulation results confirmed that Cu²⁺ and Zn²⁺ both compete for the constitutive ions of HAP and inhibit phosphorus recovery, with Cu²⁺ mainly competing for OH^- and Zn²⁺ mainly competing for PO₄^3-. This study provides a reference for the recovery of phosphorus from pig wastewater in waste foam concrete under homogeneous conditions.
- foam concrete,
- HAP,
- Box-Behnken,
- Visual MINTEQ,
- phosphorus recovery

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References(23)

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