Does the combination of biochar and clinoptilolite enhance nutrient recovery from the liquid fraction of biogas digestate?

Nazlı Pelin Kocatürk-Schumacher, Kor Zwart, Sander Bruun, Lijbert Brussaard, Lars Stoumann Jensen

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

Concentrating nutrients on biochar and clinoptilolite and subsequently using the nutrient-enriched sorbents as a fertiliser could be an alternative way to manage nutrients in digestate. In this study, we investigated the use of biochar and clinoptilolite columns in removing ammonium, potassium, orthophosphate and dissolved organic carbon (DOC) from the liquid fraction of digestate. Our objectives were to investigate the effect of the initial loading ratio between liquid and biochar on nutrient removal, and to investigate the effect of combining biochar with clinoptilolite on nutrient and DOC removal efficiency. Increasing the initial loading ratios increased nutrient concentrations on biochar to 8.61 mg NH4-N g−1, 1.95 mg PO4-P g−1 and 13.01 mg DOC g−1, but resulted in decreasing removal efficiencies. The combination of biochar and clinoptilolite resulted in improved ammonium, potassium and DOC removal efficiencies compared to biochar alone, but did not significantly change PO4-P removal efficiencies. Removal efficiencies with combined sorbents were up to 67% for ammonium, 58% for DOC and 58% for potassium. Clinoptilolite showed higher removal efficiencies compared to biochar alone, and combining clinoptilolite with biochar improved only total P removal efficiency. Concentrating nutrients with clinoptilolite and biochar may be an option when both sorbents are available at low cost.

Original languageEnglish
Pages (from-to)1313-1323
JournalEnvironmental Technology
Volume38
Issue number10
DOIs
Publication statusPublished - 2017

Fingerprint

clinoptilolite
Biofuels
biogas
Nutrients
Recovery
liquid
nutrient
Liquids
dissolved organic carbon
Organic carbon
ammonium
potassium
Sorbents
Ammonium Compounds
Potassium
orthophosphate
removal
biochar
Fertilizers
fertilizer

Keywords

  • Biochar
  • clinoptilolite
  • liquid fraction of digestate
  • nutrient recovery
  • sorption

Cite this

Kocatürk-Schumacher, Nazlı Pelin ; Zwart, Kor ; Bruun, Sander ; Brussaard, Lijbert ; Jensen, Lars Stoumann. / Does the combination of biochar and clinoptilolite enhance nutrient recovery from the liquid fraction of biogas digestate?. In: Environmental Technology. 2017 ; Vol. 38, No. 10. pp. 1313-1323.
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Does the combination of biochar and clinoptilolite enhance nutrient recovery from the liquid fraction of biogas digestate? / Kocatürk-Schumacher, Nazlı Pelin; Zwart, Kor; Bruun, Sander; Brussaard, Lijbert; Jensen, Lars Stoumann.

In: Environmental Technology, Vol. 38, No. 10, 2017, p. 1313-1323.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Does the combination of biochar and clinoptilolite enhance nutrient recovery from the liquid fraction of biogas digestate?

AU - Kocatürk-Schumacher, Nazlı Pelin

AU - Zwart, Kor

AU - Bruun, Sander

AU - Brussaard, Lijbert

AU - Jensen, Lars Stoumann

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AB - Concentrating nutrients on biochar and clinoptilolite and subsequently using the nutrient-enriched sorbents as a fertiliser could be an alternative way to manage nutrients in digestate. In this study, we investigated the use of biochar and clinoptilolite columns in removing ammonium, potassium, orthophosphate and dissolved organic carbon (DOC) from the liquid fraction of digestate. Our objectives were to investigate the effect of the initial loading ratio between liquid and biochar on nutrient removal, and to investigate the effect of combining biochar with clinoptilolite on nutrient and DOC removal efficiency. Increasing the initial loading ratios increased nutrient concentrations on biochar to 8.61 mg NH4-N g−1, 1.95 mg PO4-P g−1 and 13.01 mg DOC g−1, but resulted in decreasing removal efficiencies. The combination of biochar and clinoptilolite resulted in improved ammonium, potassium and DOC removal efficiencies compared to biochar alone, but did not significantly change PO4-P removal efficiencies. Removal efficiencies with combined sorbents were up to 67% for ammonium, 58% for DOC and 58% for potassium. Clinoptilolite showed higher removal efficiencies compared to biochar alone, and combining clinoptilolite with biochar improved only total P removal efficiency. Concentrating nutrients with clinoptilolite and biochar may be an option when both sorbents are available at low cost.

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