Preservation Business

By properly processing and recycling a wide variety of waste materials, we are helping to realize a recycling-oriented society.

Business Fields

Business Domains Supporting Recycling

  • Waste oil and sludge
    Waste oil and sludge
    Based on analysis results, waste oils from factories are mixed and adjusted to achieve the optimal composition, before being recycled as alternative fuels. Meanwhile, sludge is recycled as raw materials for cement after adjusting content and moisture and then kneading them. The aim is to ensure and maintain the quality of all recycled materials.
  • Wood waste
    Wood waste
    Large amounts of scrap wood are generated by the demolition of buildings and other sites.
    We collect and shred this material into wood chips, which is used for fueling biomass power generation plants or for making particleboard.
  • Fire-proof bricks
    Fire-proof bricks
    Fire-proof bricks are used as refractories to line glass furnaces, kilns and incinerators.
    Waste bricks generated by the demolishing of such facilities and periodic repair work are collected and carefully sorted. Recyclable items are reused as paving materials and fire-proof bricks.
  • Glass
    Plate glass is collected from glass and sash manufacturers, and glass bottles from municipalities. The collected glass is screened and pulverized at our own facility, and recycled as high-quality glass cullet.
    This is sold to manufacturers and reused to make window glass, glass bottles, or home insulation.
  • Waste acids, alkalis and sludge (inorganic/organic)
    Waste acids, alkalis and sludge (inorganic/organic)
    Waste acids, alkalis, and sludge are generated by a wide range of industries, and their properties are diverse, including inorganic and organic. Liquid waste is collected by a vacuum truck, subjected to neutralization and dewatering processes, then treated with microbes, before being discharged into the public sewer system. The residual sludge is recycled as a raw material for refi ning or composting, etc.

Processes of Industrial Waste Disposal and Recycling

Processes of Industrial Waste Disposal and Recycling

Group Network

We have a system for swift and proper waste disposal based on the necessary licenses for collection, transportation, and intermediate treatment of most types of industrial waste and specially controlled industrial waste. In addition, our outstanding technology for detoxifying industrial waste offers optimal solutions for environmental preservation.

Group Network

(As of Apri 1, 2020)

Location/Base Details
Asahi Pretec Kobe Plant
Detoxification of liquid waste and sludge
Oil-water separation of waste water
Asahi Pretec Kitakyushu Office/Plant
Incineration of various waste
Sludge recycling
Waste plastic crushing
JW Yokohama Office
Recycling of sludge, waste oil and wood chip
Recycling by sorting fire-proof bricks
JW Shonan Office/Samukawa Plant
Concreting process for burnt residues, dust and sludge generated by incinerators, etc.
JW Saitama Office/JW Chemitech Kawaguchi Plant
Neutralization and dewatering process of inorganic liquid waste
JW Chemitech Totsuka Plant
Neutralization and dewatering process of organic liquid waste
JW Chemitech Ibaraki Plant
Fermentation and composting of organic sludge and animal/plant wastes
JW Glass Recycling
Recycling of glass plate and bottles
Fuji Rozai
Regular maintenance and demolition work for glass manufacturing kilns and waste incinerators
Recycling by sorting fire-proof bricks
Taiyo Chemical Ijuin Plant/Taniyama Rinkai Plant
Incineration of various waste
Detoxification of liquid waste

Licenses acquired by the Group

Industrial waste collection transportation license All prefectures, 8 government ordinance cities and core cities
Industrial waste disposal license 12 prefectures and 8 government ordinance cities
Specially controlled industrial waste collection transportation license All prefectures, 7 government ordinance cities and core cities
Specially controlled industrial waste disposal license 10 prefectures and 7 government ordinance cities
Excellent industrial waste management company certification* Asahi Pretec: All prefectures and government ordinance cities
Affiliate in Japan: 28 prefectures, 4 government ordinance cities and core cities
As of April 1, 2020
In April 2011, Japanese laws concerning industrial waste management were revised, creating a new recognition system for excellent industrial waste management companies.
Prefectures and government ordinance cities select companies which meet their strict standards in areas such as operational implementation capacity and experience. All Group companies are pursuing this certification, aiming to ensure that customers can feel totally confident about doing business with the Group.

Solving social issues through business activities

Social issues relating to the Environmental Preservation Business

  • Contamination by hazardous waste
  • Pollution of water resources
  • Impact on land and ocean ecosystems

Contributing to the SDGs


    Realizing a sustainable society by recycling and detoxifying waste


    Securing the sustainability of water resources by detoxifying discharge such as waste acids and alkalis


    Preventing marine pollution by properly treating liquid and plastic waste


    Preventing pollution of land environments by detoxifying waste, and extending the lifespan of final disposal sites by promoting recycling


    Advancing technological innovation from the standpoint of further improving resource utilization efficiency for various waste products, and promoting global sustainability


    Achieving sustainable cities and other communities by properly managing waste


    Helping to prevent climate change by reducing CO2 emissions from waste-to-energy power generation


    Promoting high levels of sustainability by collaborating with other companies