Recycling by composting tea dregs at a beverage (tea) factory (Introduced to: Nikken Foods) - Deodorization and Composting equipment - Miraie

CASE STUDY

Construction example

2021.09.24 EASYJET Jr.

Recycling by composting tea dregs at a beverage (tea) factory (Introduced to: Nikken Foods)

PlaceShizuoka Prefecture
Processed Material and AmountTea leaves 1 ton/day, moisture content of 90%
OverviewIn this case, a company is composting tea leaves from its beverage factory on its premises

Measures and Effects

Reduce foul odorsThe material has high moisture content and is prone to fermenting anaerobically, but by improving aeration, they were able to suppress foul odors.
Raise fermentation temperatureThey increased the fermentation temperature compared to conventional methods.
Improve compost qualityActinomycetes started growing inside the compost, and quality improved.

Nikken Foods Co., Ltd. (employees: 231, capital: ¥1,300,000,000) is a company based in Shizuoka Prefecture that manufactures various processed foods and food ingredients, primarily with natural seasoning.

They have been in the tea business for several years, making tea extract as a material for bottled beverages, and supplying this to major beverage manufacturers.

They compost the tea dregs (which have the same properties as tea dregs made at home), as a way to make effective use of them after extraction.

They produced about 1 ton of tea dregs per day.  

Tea dregs have very high moisture content of about 90%, and anaerobic fermentation starts immediately, so they bought EasyJet Jr. as a solution for this problem.  

Tea dregs are made from plants, but unlike trees and grass, they contain a great deal of nitrogen, in a proportion comparable to chicken manure.

Besides tea dregs, coffee grounds also have a similar composition.

Because of this, the fermentation temperature rises easily, but due to the high moisture content, the interior of the compost soon becomes oxygen deficient.

Using EasyJet Jr. in this process makes it possible to send adequate air to the interior and do less difficult turn over work.

Measuring the original material shows it is acidic due to anaerobic fermentation, and it emits a distinctive odor. Once EasyJet Jr. is used, the compost gradually becomes alkaline and it is clear that aerobic fermentation is underway.

The finished compost is smooth and odor free, making it very easy to use.