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Waste management (food) and bio-fertilizer (agriculture): Bio Plaza: Food Waste Recycling Facility

Waste management (food) and bio-fertilizer (agriculture): Bio Plaza: Food Waste Recycling Facility

Kumamoto Seisosha Co.,Ltd.

Bio Plaza: Eco-Friendly and Cost-Efficient
Food Waste Recycling Solution

Bio Plaza is a unique food waste recycling facility operated by Kumamoto Seisosha Co. Ltd. in Japan. Using renewable energy, food waste is fermented in a closed environment where it is further processed into compost (100% organic fertilizer), which is, in turn, used to cultivate crops. Bio Plaza protects the environment by avoiding landfilling and incineration.

Major Features and Advantages


Bio Plaza: Food Waste Recycling Facility

I. Elimination of Waste Separation
Because of the company’s separation and bag-breaking technology, Bio Plaza can process various kinds of food waste including organic wastes and packaged lunch boxes. The volume reduction rate is 22%. For example at a Bio Plaza in Japan, 100t of food waste is processed every day to produce 22t of compost. 


II. Odor Free Processing
Composting plants are enclosed in a closed environment so that odor during recycling process is tightly sealed. For this reason, Bio Plaza can be built close to cities. Its deodorizing apparatus, which had been originally developed by the company, helps the recycling process to be a more pleasant activity.


III. Energy Efficiency
The energy used to operate the fermentation process includes solar energy and the heat generated from the fermentation process itself. In other words, the energy gets recycled. As described in the company’s policy, renewable energy is used as much as possible. Bio Plaza contributes to energy conservation and is, therefore, friendly to the environment.

IV. Economical Operation
Bio Plaza does not only save energy but also money! Running cost of Bio Plaza is around 50% of Japanese public sector incineration and final treatment facilities. Bio Plaza is a good choice in terms of cost-performance.


V. JAS-Certified 100% Organic Compost
The produced compost or bio-fertilizer is 100% organic and is certified as a Japanese Agricultural Standard (JAS) product. The existing consumers are highly satisfied with the product and the company has been receiving many positive feedbacks from them. Because of a very high demand for this product, the amount of request for the purchase always exceeds the amount of production.

With these great features, Bio Plaza turns food waste into useful bio-fertilizer. It saves the environment by connecting consumers with producers in the agricultural industry.

Technology Data

Technology data

Conceivable applications

We believe that our unique food waste treatment system, consisting of food waste partitioning technology, sealed biological deodorization technology and fermentation process, can provide unique solutions for solving landfill/incineration disposal issues.

Our food waste recycling facility, so-called ‘Bio Plaza’, does not use disposal methods such as burying or incineration. 100% organic fertilizer made at our food waste recycling facilities is used to cultivate crops, which forms a recycle loop that links consumers with producers in agricultural industry. We always receive a good feedback from our existing buyers of the produced fertilizer. Our fertilizer product is certified as Japanese Agricultural Standard (JAS) product.

Competitive advantage

1. Waste Partitioning Technology and Capacity
Bio Plaza can accept an extensive range of food wastes including organic wastes and plastics. Our partitioning technology can process food wastes without separation beforehand. Productive capacity for processing food wastes into compost is 10 ton per hour.

2. Unique Biological Deodorization Technology
We have developed our own deodorization technology to completely treat and seal odor of food wastes during the recycling process. Because of this, our facility can be located anywhere (i.e. near highway, factories, and office buildings).

3. Environmentally-friendly Treatment Process
Heat generated from fermentation process and heat from sunlight are used to operate fermentation treatment process. By considering global environmental sustainability, we have a policy to use renewable energy as much as possible when needed for the fermentation process.

4. Niche Market for 100% Organic Fertilizer Product
We always receive a good feedback from our existing buyers of the produced compost (100% organic fertilizer) and we see that there is very high demand for our product. For instance, we frequently receive order from our customers more than our facility can product per day. Our product is certified as Japanese Agricultural Standard (JAS) product.

5. Cost
Our facility can process a quite large amount of food wastes at once, compared to other food waste recycling facilities in Japan today. Our facility significantly reduces cost for recycling food wastes because of the unique processing capacity. For instance, cost of recycling food wastes in our facility is almost a half of that in other food waste recycling facilities currently operated in Nagoya City, Aichi Prefecture, Japan.


Kumamoto Seisosha (Kumasei) started business with general waste and industrial waste collection and transportation. In our past work, we recognized the importance of food recycling when considering whether it was possible to recycle food waste. With this in mind, we have established our own technology to make high quality compost by recycling food waste. The produced compost (100% organic fertilizer) is certified as Japanese Agricultural Standard (JAS) product.

So far we have established two Bio Plaza facilities in Japan. One is in Kumamoto City, Kumamoto Prefecture, established in 2002, and the other one is in Nagoya City, Aichi Prefecture, established in 2007. For instance, Bio Plaza in Nagoya City, Aichi Prefecture, processes food wastes of 100 ton per day. The amount of compost produced is 22 ton per day.

Odor of food waste is well controlled as the composting plants are built in a closed method. By considering global environmental sustainability, we have a policy to use renewable energy as much as possible when needed for processing food wastes with fermentation technology.

Technical maturity / Past record of introduction

Bio Plaza Nagoya

Year Amount of food waste
recycled (kg)
Amount of compost
produced (kg)
2009 20,614,890 1,947,112
2010 26,544,830 9,273,786
2011 26,677,310 9,007,852
2012 27,825,600 5,857,093
2013 28,805,060 7,050,142

Conceivable risk

Because our facility involves the use of natural providence (i.e. organic food waste), it is sometimes difficult to operate and maintain the amount of food wastes to be recycled and the amount of compost to be produced. Furthermore, you must need technical and operational experience when managing the quality of compost produced in areas with high humidity climate condition.

Information on patent related to this technology

Processing system for garbage
Patent No. 3975293

Company Data

Company data

Name Kumamoto Seisosha Co.,Ltd.
Address 1000-5 Ikenoue-machi, Nishi-ku, Kumamoto City, Kumamoto 860-0048 JAPAN
Capital 3 million yen
Contact person Mr. Masahiro Inoue
TEL: +81-96-325-5353
Number of employees 102 (including 1 for international operation)
Date of company foundation 27th of August 1971
The type of business General waste, industrial waste collection and transportation, food waste recycling (composting)

Modality of business transaction

Direct Investment
We would consider direct investment to establish and manage our food waste recycling facility if there are needs from local municipalities for food recycling and compost production.

In order to expand our business in your country, we would like to form a partnership with local companies and/or governmental organizations. We would provide training for management, technical operation, maintenance and required know-how to manage our food waste recycling facility.


Schematic illustration of the technology

1. Flow Diagram of Bio Plaza


2. Production of Organic Fertilizer (Green Supple) by Recycling Food Wastes


3. Bio Plaza: Food Waste Recycling Facility (1)


4. Bio Plaza: Food Waste Recycling Facility (1)


Contact Person(s) *Please mention that you saw UNIDO's website when making the first contact with the company.

Mr. Masahiro InoueE-mail:

Registered Category

  • Low carbon & energy conservation : Agriculture, fishing, and forestry
  • Waste treatment & management : Production process / Municipal solid waste