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Published August 9, 2021 | Version v1
Journal article Open

A biobased, bioactive, low CO2 impact coating for soil improvers

Creators

  • 1. University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria
  • 2. AIT, Austrian Institute of Technology, Konrad-Lorenz-Straße 24, 3430 Tulln, Austria
  • 3. University of Antwerp, Department of Bioscience Engineering, Research Group of Sustainable Energy, Air and Water Technology, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
  • 4. SAPPI Papier Holding GmbH, Brucker Strasse 21, 8101 Gratkorn, Austria
  • 5. Centre Mondial de l'Innovation Roullier - Laboratoire de Nutrition Végétale, 18 avenue Franklin Roosevelt, 35400 Saint-Malo, France
  • 6. ABiTEP GmbH, Glienicker Weg 185, 12489 Berlin, Germany
  • 7. University of Natural Resources and Life Sciences, Vienna, Institute of Environmental Biotechnology, Konrad Lorenz Straße 20, 3430, Tulln an der Donau, Austria; Austrian Centre for Industrial Biotechnology (ACIB), Konrad Lorenz Strasse 20, 3430, Tulln an der Donau, Austria

Description

Lignosulfonate-based bioactive coatings as soil improvers for lawns were developed using laccase as a biocatalyst. Incorporation of glycerol, xylitol and sorbitol as plasticizers considerably reduced the brittleness of the synthesized coatings of marine carbonate granules while thermal enzyme inactivation at 100 °C enabled the production of stable coatings. Heat inactivation produced stable coatings with a molecular weight of 2000 kDa and a viscosity of 4.5 × 10−3 Pas. The desired plasticity for the spray coating of soil improver granules was achieved by the addition of 2.7% of xylitol. Agriculture beneficial microorganisms (four different Bacillus species) were integrated into the coatings. The stable coatings protected the marine calcium carbonate granules, maintained the viability of the microorganisms and showed no toxic effects on the germination and growth of model plants including corn, wheat, salad, and tomato despite a slight delay in germination. Moreover, the coatings reduced the dust formation of soil improvers by 70%. CO2 emission analysis showed potential for the reduction of up to 3.4 kg CO2-eq. kg−1 product, making it a viable alternative to fossil-based coatings.

Notes

This work was supported by the NÖ Forschungs- und Bildungsges.m.b.H. [grant number SC17-007]. The SUFERT project has received funding from the Bio-based Industries Joint Undertaking (BBI-JU) under grant agreement No. 792021. The BBI-JU receives support from the European Union's Horizon 2020 research and innovation programme and the Bio-Based Industries Consortium.

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Additional details

Funding

SUSFERT – Sustainable multifunctional fertilizer – combining bio-coatings, probiotics and struvite for phosphorus and iron supply 792021
European Commission