Comparing the agrochemical properties of compost and vermicomposts produced from municipal sewage sludge digestate

Márk Rékási, Nikolett Mazsu, Eszter Draskovits, Botond Bernhardt, A. Szabó, Pierre Adrien Rivier, Csilla Farkas, Barbara Borsányi, Béla Pirkó, Sándor Molnár, György Kátay, Nikolett Uzinger

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The aim of this work was to investigate whether the agronomic traits of vermicompost prepared from partially stabilised sewage sludge digestate after thermophilic composting were more favourable than those of conventional compost. The effects of various additives (green waste, spent mushroom compost, wheat straw, biochar) were also tested after 1.5 months precomposting followed by 3 months vermicomposting with Eisenia fetida or by compost maturing. Vermicomposting did not result in significantly more intensive mineralisation than composting; the average organic carbon contents were 21.2 and 22.2% in vermicomposts and composts, respectively. Hence, the average total (N: 2.4%; P: 1.9%; K: 0.9%) and available (N: 160 mg/kg; P: 161 mg/kg; K: 0.8%) macronutrient concentrations were the same in both treatments. The processing method did not influence the organic matter quality (E4/E6) either. However, on average the concentration of the plant growth regulator kinetin was more than twice as high in vermicomposts.

Original languageEnglish
Article number121861
JournalBioresource Technology
Volume291
DOIs
Publication statusPublished - Nov 2019

Keywords

  • Compost
  • Macronutrients
  • Organic matter quality
  • Plant growth regulator
  • Vermicompost

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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  • Cite this

    Rékási, M., Mazsu, N., Draskovits, E., Bernhardt, B., Szabó, A., Rivier, P. A., Farkas, C., Borsányi, B., Pirkó, B., Molnár, S., Kátay, G., & Uzinger, N. (2019). Comparing the agrochemical properties of compost and vermicomposts produced from municipal sewage sludge digestate. Bioresource Technology, 291, [121861]. https://doi.org/10.1016/j.biortech.2019.121861