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Energies 2019, 12(2), 296; https://doi.org/10.3390/en12020296

Struvite—An Innovative Fertilizer from Anaerobic Digestate Produced in a Bio-Refinery

1
Department of Soil Environment Sciences, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
2
Department of Economics and Organisation of Enterprises, Warsaw University of Life Sciences—SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland
3
Cornelissen Consulting Services BV, Binnensingel 3, 7411 PL Deventer, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 7 December 2018 / Revised: 11 January 2019 / Accepted: 15 January 2019 / Published: 18 January 2019
(This article belongs to the Special Issue Production and Utilization of Biogas)
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Abstract

This paper presents the results of a pot experiment aimed at the assessment of the fertilizer value of struvite, a precipitation product obtained from a liquid fraction of the digestate. The effects of struvite (STR), struvite + ammonium sulphate (STR + N) and ammonium phosphate (AP) treatments were examined on maize and grass cultivation on silty loam and loamy sand soil. The crop yields were found to depend on both the soil type and experimental treatment. Crop yields produced under STR and STR + N exceeded those under the control treatments by respectively 66% and 108% for maize, and 94% and 110% for grass. Crop yields under STR + N were similar or greater than those under the AP treatment. The nitrogen recovery by maize and grass reached respectively 68% and 62% from the struvite and 78% and 52% from AP. The phosphorus recovery by maize and grass reached 7.3% and 4.8%, respectively, from struvite (i.e., STR and STR + N), which was lower than that from the AP (18.4% by maize and 8.1% by grass). View Full-Text
Keywords: struvite precipitation; biogas plant; farm bio-refinery; P and N recovery; fertilizer value struvite precipitation; biogas plant; farm bio-refinery; P and N recovery; fertilizer value
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Szymańska, M.; Szara, E.; Wąs, A.; Sosulski, T.; van Pruissen, G.W.; Cornelissen, R.L. Struvite—An Innovative Fertilizer from Anaerobic Digestate Produced in a Bio-Refinery. Energies 2019, 12, 296.

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