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Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors

Tutkimustuotosvertaisarvioitu

Standard

Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors. / Taddeo, Raffaele; Lepistö, Raghida.

julkaisussa: Water Science and Technology, Vuosikerta 71, Nro 6, 2015, s. 892-897.

Tutkimustuotosvertaisarvioitu

Harvard

Taddeo, R & Lepistö, R 2015, 'Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors', Water Science and Technology, Vuosikerta. 71, Nro 6, Sivut 892-897. https://doi.org/10.2166/wst.2015.045

APA

Vancouver

Author

Taddeo, Raffaele ; Lepistö, Raghida. / Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors. Julkaisussa: Water Science and Technology. 2015 ; Vuosikerta 71, Nro 6. Sivut 892-897.

Bibtex - Lataa

@article{6ed4cec080c74494b5b43ff574920d21,
title = "Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors",
abstract = "The release of nitrogen (N) and phosphorus (P) from agro-industrial sources is a major environmental concern. Furthermore, the scarcity of mineable P and the growing demand for food worldwide necessitate that we find an alternative P source. This study applied struvite precipitation for N-P recovery to slurries with high levels of organics and ammonia to achieve environmental protection from excessive nutrients diffusion and to generate a sustainable P source. Batch tests were carried out on raw and co-digested swine slurries to study the feasibility of struvite precipitation and the effect of several parameters, including pH, reaction time, competing ions (Ca2+, K+), total solids (TS), and alkalinity. The batch assays with raw swine slurries showed high N-P removals (up to 80{\%}), while the anaerobic liquor returned lower recovery efficiency due to the high solids and alkali content. Struvite crystallization was detected at pH values as low as 6, and the characteristics of the recovered struvite matched those of the theoretical. Slight co-precipitation of calcium-phosphates occurred and was dependent on the Ca2+/Mg2+ ratio rather than on varying pH values. Struvite precipitation was shown to be feasible in complex matrices as agro-industrial effluents, characterized by high NH4+, alkalinity, solids and organic content, and interfering ions such as Ca2+ and K+.",
keywords = "Eutrophication, Manure treatment, Nutrients removal and recovery, Struvite",
author = "Raffaele Taddeo and Raghida Lepist{\"o}",
year = "2015",
doi = "10.2166/wst.2015.045",
language = "English",
volume = "71",
pages = "892--897",
journal = "Water Science and Technology",
issn = "0273-1223",
publisher = "IWA Publishing",
number = "6",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors

AU - Taddeo, Raffaele

AU - Lepistö, Raghida

PY - 2015

Y1 - 2015

N2 - The release of nitrogen (N) and phosphorus (P) from agro-industrial sources is a major environmental concern. Furthermore, the scarcity of mineable P and the growing demand for food worldwide necessitate that we find an alternative P source. This study applied struvite precipitation for N-P recovery to slurries with high levels of organics and ammonia to achieve environmental protection from excessive nutrients diffusion and to generate a sustainable P source. Batch tests were carried out on raw and co-digested swine slurries to study the feasibility of struvite precipitation and the effect of several parameters, including pH, reaction time, competing ions (Ca2+, K+), total solids (TS), and alkalinity. The batch assays with raw swine slurries showed high N-P removals (up to 80%), while the anaerobic liquor returned lower recovery efficiency due to the high solids and alkali content. Struvite crystallization was detected at pH values as low as 6, and the characteristics of the recovered struvite matched those of the theoretical. Slight co-precipitation of calcium-phosphates occurred and was dependent on the Ca2+/Mg2+ ratio rather than on varying pH values. Struvite precipitation was shown to be feasible in complex matrices as agro-industrial effluents, characterized by high NH4+, alkalinity, solids and organic content, and interfering ions such as Ca2+ and K+.

AB - The release of nitrogen (N) and phosphorus (P) from agro-industrial sources is a major environmental concern. Furthermore, the scarcity of mineable P and the growing demand for food worldwide necessitate that we find an alternative P source. This study applied struvite precipitation for N-P recovery to slurries with high levels of organics and ammonia to achieve environmental protection from excessive nutrients diffusion and to generate a sustainable P source. Batch tests were carried out on raw and co-digested swine slurries to study the feasibility of struvite precipitation and the effect of several parameters, including pH, reaction time, competing ions (Ca2+, K+), total solids (TS), and alkalinity. The batch assays with raw swine slurries showed high N-P removals (up to 80%), while the anaerobic liquor returned lower recovery efficiency due to the high solids and alkali content. Struvite crystallization was detected at pH values as low as 6, and the characteristics of the recovered struvite matched those of the theoretical. Slight co-precipitation of calcium-phosphates occurred and was dependent on the Ca2+/Mg2+ ratio rather than on varying pH values. Struvite precipitation was shown to be feasible in complex matrices as agro-industrial effluents, characterized by high NH4+, alkalinity, solids and organic content, and interfering ions such as Ca2+ and K+.

KW - Eutrophication

KW - Manure treatment

KW - Nutrients removal and recovery

KW - Struvite

UR - http://www.scopus.com/inward/record.url?scp=84929000113&partnerID=8YFLogxK

U2 - 10.2166/wst.2015.045

DO - 10.2166/wst.2015.045

M3 - Article

VL - 71

SP - 892

EP - 897

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

IS - 6

ER -