Win a copy of A Food Forest in Your Garden this week in the Forest Garden forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • jordan barton
  • Pearl Sutton
  • Steve Thorn
  • Leigh Tate
  • r ranson
  • paul wheaton
  • Nicole Alderman
  • Greg Martin
  • Mike Haasl
master gardeners:
  • John F Dean
  • Carla Burke
  • Jay Angler
  • Nancy Reading

Hot Compost & Thermophilic Fungi

Posts: 382
Location: wanderer
forest garden fungi foraging bike homestead
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
This is pretty cool!

Thermotolerant and Thermophilic Mycobiota in Different Steps of Compost Maturation

Simone Di Piazza, et. al. wrote:Composting is a complex process in which various micro-organisms, mainly fungi and bacteria, are involved. The process depends on a large number of factors (biological, chemical, and physical) among which microbial populations play a fundamental role. The high temperatures that occur during the composting process indicate the presence of thermotolerant and thermophilic micro-organisms that are key for the optimization of the process. However, the same micro-organisms can be harmful (allergenic, pathogenic) for workers that handle large quantities of material in the plant, and for end users, for example, in the indoor environment (e.g., pots in houses and offices). Accurate knowledge of thermotolerant and thermophilic organisms present during the composting stages is required to find key organisms to improve the process and estimate potential health risks. The objective of the present work was to study thermotolerant and thermophilic mycobiota at different time points of compost maturation. Fungi were isolated at four temperatures (25, 37, 45, and 50 °C) from compost samples collected at five different steps during a 21-day compost-maturation period in an active composting plant in Liguria (northwestern Italy). The samples were subsequently plated on three different media. Our results showed a high presence of fungi with an order of magnitude ranging from 1 × 104 to 3 × 105 colony-forming units (CFU) g−1. The isolated strains, identified by means of specific molecular tools (ITS, beta-tubulin, calmodulin, elongation factor 1-alpha, and LSU sequencing), belonged to 45 different species. Several thermophilic species belonging to genera Thermoascus and Thermomyces were detected, which could be key during composting. Moreover, the presence of several potentially harmful fungal species, such as Aspergillus fumigatus, A. terreus, and Scedosporium apiospermum, were found during the whole process, including the final product. Results highlighted the importance of surveying the mycobiota involved in the composting process in order to: (i) find solutions to improve efficiency and (ii) reduce health risks.

Conclusions wrote:This is one of few studies that analyzed mycobiota during compost-maturation phases, and is currently the only one in which species were accurately identified using ITS sequencing supplemented with secondary barcodes. Our results confirmed high biodiversity of the fungal component that tends to stabilize during the compost-maturation process. Results showed a high presence of thermophilic and thermotolerant species that, if properly managed, could improve the composting process. However, a significant presence of species potentially harmful to the health of workers and end users should also be noted.

Source: Thermotolerant and Thermophilic Mycobiota in Different Steps of Compost Maturation
Try 100 things. 2 will work out, but you will never know in advance which 2. This tiny ad might be one:
paul's patreon stuff got his videos and podcasts running again!
    Bookmark Topic Watch Topic
  • New Topic