Work

Mushroom production on digestate: Mineral composition of cultivation compost, mushrooms, spent mushroom compost and spent casing

Year: 2024

Type: article

Abstract: Produced in the process of anaerobic digestion, digestate is rich in nutrients and can be used as a growing media for mushrooms. However, it can also be rich in non-essential and trace elements, heavy metals, various organic pollutants, and other unwanted compounds with potential negative effects. Two button mushroom species, Agaricus bisporus (brown cultivar) and Agaricus subrufescens, were cultivated on digestate based substrate. The mineral composition of the experimental mushroom compost (EMC), mushrooms, spent mushroom compost (SMC) and spent casing (SC) was evaluated by means of ICP OES. Mineral distribution and quantity were substrate dependent, digestate origin was determined for most of investigated elements, excluding Ca, Mo, Pb, Ce and Nd, where the source was straw. Content of elements with high mobility: Cd, Cu, Pb and Zn for EMC was low. Short composting method for mushroom compost preparation could be suitable method for reducing available Cd, Cr, Ni, Pb, Zn and total As. For the casing material, bark was richer in major essential elements (MEE’s) and essential trace elements (ETE’s), besides Ca, where peat indicated higher content. From the trace elements with detrimental health effects (TEWDHE) group, bark was richer in Ba and Pb, but peat contained significant content of As. Both studied mushrooms are valuable source of K, Na and Se, while A. subrufescens provided higher amounts of Cu and Zn. No threat for human consumption for Ni, Pb, As, and Cd, their content decreases with each subsequent mushroom yield. SMC and SC were nutrient rich especially for Fe, Mg, Mn, Si and Zn, giving added value as biobased product for boosting vegetable crop yield. Cr and Ni, ETS’s for plants in lower amounts, were elevated in SMC/SC, therefore the mineral composition should be monitored. Low concentration of hazardous elements in the spent substrates allows for subsequent use.

Source: Journal of Agriculture and Food Research

DOI: 10.1016/j.jafr.2024.101518

Authors: Agnieszka Jasinska, Ketil Stoknes, Przemyslaw Niedzielski, Anna Budka, Miroslaw Mleczek

Institutions: Lindum (Norway), Poznań University of Life Sciences, Adam Mickiewicz University in Poznań

Language: English

Topic: Fungal Biology and Applications

Subfield: Pharmacology (medical)

Field: Medicine

Domain: Health Sciences

SDGs: Responsible consumption and production, Zero hunger

Open Access status: gold

Estimated APC paid: $1,890