Nutrient Recovery From the Liquid Fraction of Digestate by Clinoptilolite

Pelin Kocatürk, Sander Bruun, Kor Zwart, Lars Stoumann Jensen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

The direct application of the liquid fraction of biogas digestate to agricultural fields as a fertilizer may result in practical and environmental problems. Concentrating nutrients onto clinoptilolite and subsequently using clinoptilolite as a fertilizer could be an alternative solution for the management of nutrients in the liquid fraction of digestate. In this study, the use of clinoptilolite to recover ammonium, potassium, and orthophosphate from the liquid fraction of digestate was investigated. The optimal preconditioning of clinoptilolite and the optimal initial nutrient-to-clinoptilolite loading ratio was determined to achieve the highest nutrient removal efficiency. Preconditioning of clinoptilolite had no significant effect on the total ammonium and potassium removal from the liquid fraction of digestate. An increase in the initial loading ratio significantly increased nutrient concentrations on the clinoptilolite, but decreased nutrient removal efficiencies from the liquid fraction of digestate: removal efficiencies ranged from 40 to 89% for ammonium, 37 to 78% for potassium, and 64 to 80% for orthophosphate at various initial loading ratios. Overall, the increase in the concentration of nutrients on the clinoptilolite was relatively low, however, nutrients could be removed from the liquid fraction of digestate with high removal efficiencies. This indicated that the use of clinoptilolite could be a solution for improved management and utilization of the liquid fractions of digestate.
Original languageEnglish
Article numbere201500153
JournalClean - Soil, Air, Water
Volume45
Issue number6
DOIs
Publication statusPublished - 2017

Fingerprint

clinoptilolite
Nutrients
Recovery
liquid
nutrient
Liquids
Ammonium Compounds
Potassium
ammonium
potassium
Fertilizers
orthophosphate
Phosphates
fertilizer
Biogas
Biofuels
biogas

Keywords

  • Adsorption
  • Ion exchange
  • Nutrient removal
  • Preconditioning
  • Zeolite

Cite this

Kocatürk, Pelin ; Bruun, Sander ; Zwart, Kor ; Jensen, Lars Stoumann. / Nutrient Recovery From the Liquid Fraction of Digestate by Clinoptilolite. In: Clean - Soil, Air, Water. 2017 ; Vol. 45, No. 6.
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abstract = "The direct application of the liquid fraction of biogas digestate to agricultural fields as a fertilizer may result in practical and environmental problems. Concentrating nutrients onto clinoptilolite and subsequently using clinoptilolite as a fertilizer could be an alternative solution for the management of nutrients in the liquid fraction of digestate. In this study, the use of clinoptilolite to recover ammonium, potassium, and orthophosphate from the liquid fraction of digestate was investigated. The optimal preconditioning of clinoptilolite and the optimal initial nutrient-to-clinoptilolite loading ratio was determined to achieve the highest nutrient removal efficiency. Preconditioning of clinoptilolite had no significant effect on the total ammonium and potassium removal from the liquid fraction of digestate. An increase in the initial loading ratio significantly increased nutrient concentrations on the clinoptilolite, but decreased nutrient removal efficiencies from the liquid fraction of digestate: removal efficiencies ranged from 40 to 89{\%} for ammonium, 37 to 78{\%} for potassium, and 64 to 80{\%} for orthophosphate at various initial loading ratios. Overall, the increase in the concentration of nutrients on the clinoptilolite was relatively low, however, nutrients could be removed from the liquid fraction of digestate with high removal efficiencies. This indicated that the use of clinoptilolite could be a solution for improved management and utilization of the liquid fractions of digestate.",
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Nutrient Recovery From the Liquid Fraction of Digestate by Clinoptilolite. / Kocatürk, Pelin; Bruun, Sander; Zwart, Kor; Jensen, Lars Stoumann.

In: Clean - Soil, Air, Water, Vol. 45, No. 6, e201500153, 2017.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Nutrient Recovery From the Liquid Fraction of Digestate by Clinoptilolite

AU - Kocatürk, Pelin

AU - Bruun, Sander

AU - Zwart, Kor

AU - Jensen, Lars Stoumann

PY - 2017

Y1 - 2017

N2 - The direct application of the liquid fraction of biogas digestate to agricultural fields as a fertilizer may result in practical and environmental problems. Concentrating nutrients onto clinoptilolite and subsequently using clinoptilolite as a fertilizer could be an alternative solution for the management of nutrients in the liquid fraction of digestate. In this study, the use of clinoptilolite to recover ammonium, potassium, and orthophosphate from the liquid fraction of digestate was investigated. The optimal preconditioning of clinoptilolite and the optimal initial nutrient-to-clinoptilolite loading ratio was determined to achieve the highest nutrient removal efficiency. Preconditioning of clinoptilolite had no significant effect on the total ammonium and potassium removal from the liquid fraction of digestate. An increase in the initial loading ratio significantly increased nutrient concentrations on the clinoptilolite, but decreased nutrient removal efficiencies from the liquid fraction of digestate: removal efficiencies ranged from 40 to 89% for ammonium, 37 to 78% for potassium, and 64 to 80% for orthophosphate at various initial loading ratios. Overall, the increase in the concentration of nutrients on the clinoptilolite was relatively low, however, nutrients could be removed from the liquid fraction of digestate with high removal efficiencies. This indicated that the use of clinoptilolite could be a solution for improved management and utilization of the liquid fractions of digestate.

AB - The direct application of the liquid fraction of biogas digestate to agricultural fields as a fertilizer may result in practical and environmental problems. Concentrating nutrients onto clinoptilolite and subsequently using clinoptilolite as a fertilizer could be an alternative solution for the management of nutrients in the liquid fraction of digestate. In this study, the use of clinoptilolite to recover ammonium, potassium, and orthophosphate from the liquid fraction of digestate was investigated. The optimal preconditioning of clinoptilolite and the optimal initial nutrient-to-clinoptilolite loading ratio was determined to achieve the highest nutrient removal efficiency. Preconditioning of clinoptilolite had no significant effect on the total ammonium and potassium removal from the liquid fraction of digestate. An increase in the initial loading ratio significantly increased nutrient concentrations on the clinoptilolite, but decreased nutrient removal efficiencies from the liquid fraction of digestate: removal efficiencies ranged from 40 to 89% for ammonium, 37 to 78% for potassium, and 64 to 80% for orthophosphate at various initial loading ratios. Overall, the increase in the concentration of nutrients on the clinoptilolite was relatively low, however, nutrients could be removed from the liquid fraction of digestate with high removal efficiencies. This indicated that the use of clinoptilolite could be a solution for improved management and utilization of the liquid fractions of digestate.

KW - Adsorption

KW - Ion exchange

KW - Nutrient removal

KW - Preconditioning

KW - Zeolite

U2 - 10.1002/clen.201500153

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JO - Clean - Soil, Air, Water

JF - Clean - Soil, Air, Water

SN - 1863-0650

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