2021.10.02 EASYJET Jr.
Composting and recycling of waste mushroom beds (Hokken style mushroom bed processing) (Introduced to: Mushroom Production Association A)
In this case, waste mushroom beds are composted and packed in bags, increasing sales.
|Processed Material and Amount||Waste mushroom bed 400 tons/year|
|Overview||In this case, waste mushroom beds are composted and packed in bags, increasing sales.|
Measures and Effects
|Increase processing volume||By changing from a composting method of only doing turn over to using high pressure aeration, it became possible to process a large amount even in a small area.|
|Raise fermentation temperature||The high-pressure aeration method made it possible to stabilize fermentation temperature.|
|Reduce costs||By building a low-cost composting system using less labor, they were able to sell waste mushroom beds as compost for a profit. They realized reduction of processing cost|
|Improve compost quality||By building a low-cost composting system using less labor, they were able to sell waste mushroom beds as compost for a profit. They realized reduction of processing cost.|
Hokken cultivates mushrooms on the surface of beds, so the mushroom beds are always submerged in water.
Therefore, the moisture content of their waste mushroom beds reaches about 80%.
With such high moisture content, even if the beds are fermented, they are not suitable for use as bedding, so it is more realistic to aim for composting.
The method of composting is to shred the waste mushroom bed, mix it with chicken manure (dried chicken manure, chicken manure fertilizer, etc. are also acceptable), and aerate the compost to promote fermentation. This can also be done simply with a flexible container bag.
However, if composting is not done properly, the compost will not be of suitable quality for distribution.
Caution is necessary, as mushroom beds have a high C:N ratio, and if this compost is put into the field without fermentation, it will cause nitrogen starvation and inhibit crop growth.
The cost can be kept low by using idle land or farming houses for the composting building.
With regard to the cost balance of waste mushroom bed recycling, assuming that 100 tons of waste mushroom beds are recycled annually, the processing cost of composting will be ¥5.8 per 1 kilogram of waste mushroom bed and ¥1.7 yen for electricity, totaling ¥7.5. If the compost is sold in 10 kilogram bags, they will make revenue of ¥2,000,000 per year. Even after deducting the cost of the compost bags, it is possible to recover the investment in two and a half years.
Mushroom compost has no odor if fermented properly, so it is easy to handle, but also highly prized, so it can be a promising source of revenue.
We also lend simple fermenters (EasyJet Jr.) for trial use, so feel free to contact us if you are interested.
In preparation for introduction, we did composting tests of waste mushroom beds using flexible container bags at our in-house test facility, and made a proposal for a plant based on the test data.