Kagome Iwaki Onahama Greenfarm: “We had an urgent need to respond to complaints from the community about foul odors.” - Deodorization and Composting equipment - Miraie

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Comments from our clients

2021.11.01 VOICE

Kagome Iwaki Onahama Greenfarm: “We had an urgent need to respond to complaints from the community about foul odors.” 

We had an urgent need to respond to complaints from the community about foul odors.

What we are most aware of and most wary of is complaints from members of the community.

Especially about foul odors. It was impossible for us to control foul odors, since we could not predict which way the wind would blow them.

The foul odor itself was a problem in the first place. At the time, we introduced rotary fermentation equipment, but there was no dedicated manager. In fact, the person in charge of our greenhouse was also responsible for the composting site.

As a result of this, we started to get complaints about the foul odor, which we had been most wary of.

We were processing a high volume of compost, and could not track the status of the compost in a timely manner, so the compost became a sludge like substance and generated waste water.

Our failure to respond to this issue resulted in foul odors being generated.

Therefore, we decided to start by processing the sludge-like material. At the time, we disposed of just less than 300 tons of sludge-like compost, and the cost of processing all this was several million yen (equivalent to tens of thousands of dollars).

However, this response only treated the symptom of the actual problem, and we inevitably had to repeat this response.

We determined that we needed to take measures which addressed the fundamental cause of the problem, so we started investigating how to improve our composting facilities.

Discovering Miraie

That’s when we discovered Miraie.

There are few companies that sell their systems by offering clear solutions to various problems such as compost fermentation, foul odor, and waste water treatment. We decided to go with Miraie’s system because the president and the sales staff could recommend their system with confidence.

When doing tomato cultivation, leaves and stems must be pruned constantly. We generated about 40 cubic meters per day, or on a weight basis about 1,000 tons of prunings per year.

Initially, the municipal sanitation center accepted prunings, but the processing volume became too great for them to handle. They requested that we dispose of the prunings ourselves, so we installed a rotary fermenter in order to compost prunings on our premises.

However, we suffered the kind of troubles mentioned above when operating only the rotary fermenter.

When we introduced EasyJet, Miraie proposed that we introduce it only to the first half of the area, and leave half of the blower aeration of the rotary fermenter, and we started operating EasyJet according to that proposal.

We are satisfied with support after introduction

Before introducing EasyJet, the fermentation temperature was as low as 40˚ to 50˚ C. Now, even in winter, the temperature reaches 70˚ to 80˚ C within 2 to 3 days after inputting materials.

Recently we changed our method of operation, adopting the method of using a blower and EasyJet simultaneously, on a trial basis. EasyJet clearly raises the fermentation temperature faster, and maintains a higher temperature. This reconfirms the benefits of the high pressure aeration method.

Kagome Iwaki Onahama Greenfarm (Riki Yoshida, Director & Farm Manager)

We’ve had no major system problems with EasyJet, and the only maintenance it requires is nozzle replacement. Even when something does go wrong, support staff has come on-site to deal with problems many times, so we can use it with peace of mind.

Iwaki Onahama Greenfarm

This agricultural corporation is located in Iwaki City, Fukushima Prefecture. It grows 3,500 tons of tomatoes per year. The fresh tomatoes we grow are sold at supermarkets through Kagome’s routes.

Our facilities cover 10 hectares, equivalent to twice the area of the Tokyo Dome, boasting the largest greenhouse cultivation in Asia.