Open windrow composting of fish waste in Estonia
Laen...
Kuupäev
2020
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
By-catch fish is caught unintentionally during the fishing and is currently thrown back
in water bodies to cause the water pollution. Currently fishermen does not have a motivation to
bring the by-catch fish to the shore, as it needs to be sorted by fish species, causing fishermen
extra work without additional income. Estonian Ministry of Rural Affairs decided to give funding
to present study with purpose to find solution to this matter. One possible solution for by-catch
fish utilization is to produce high value nutrient rich fertilizer in order to close nutrient cycle and
return valuable nutrients into soil. The adaptive study of outdoor windrow composting was
conducted with consecutive treatments, rather than simultaneously, in order to make adaptive
improvements to the set-up of each consecutive treatment. The consecutive treatments showed
that fish waste composting is manageable from a technical perspective, feasible in a temperate
climate, and that this type of compost holds high potential as an organic fertiliser or soil improver.
Composting process started rapidly and, as required by the EU Commission regulation EU 142/2011,
temperatures exceeded 70 °C for at least 1 h in all windrows. While initial treatments suffered
from odours, as well as events inhibitive to the composting process, these disadvantages were
successfully avoided in later treatments by adding a biofilter and inoculant from previous
composting windrows, as well as lake sediments. Rather than disposing of low-value fish, these
can be recycled into stable and nutrient-rich compost on-site, near fishing harbours.
Kirjeldus
Märksõnad
by-catch, biofilter, clay minerals, lake sediment, organic fertiliser, wheat straw, articles