Incineration or Sterilization--Mixed Voices on Medical Waste, February 2003

Incineration or Sterilization--Mixed Voices on Medical Waste, February 2003

In the early 2000s, Japanese society was shaken by a dual anxiety. In 1992, the Ministry of Health and Welfare designated "infectious wastes" as specially controlled wastes, requiring the strict disposal of medical wastes such as gauze, injection needles, and dialysis equipment. However, the Ministry of Health and Welfare has also mandated incineration for the prevention of infectious diseases. However, the incinerator, which was designed to prevent infectious diseases, has now become a symbol of the generation of toxic substances that are detested by local residents. The dichotomy between medical safety and environmental safety created a social conflict.

The voices of the medical community were realistic. Incineration is the surest way to reduce the risk of infection. It is superior in that a large amount of waste can be disposed of all at once. However, opposition from nearby residents and stricter regulations made it difficult to operate in-house incinerators, leading to greater reliance on outsourcing. Meanwhile, waste disposal companies appealed for a switch to new technologies. Methods such as sterilizers, carbonizing furnaces, and even melting technology emerged as viable alternatives to incineration.

Local residents also had deep-seated concerns. Dioxin and other toxic emissions from incinerators threaten the health of children and their families. The appeal that it was unacceptable to take on environmental risks in the name of infectious disease control was socially persuasive. In response to these voices, medical associations and academics preached the need for medical institutions to shift from incineration-centered to sterilization and recycling techniques against a backdrop of increased emitter responsibility.

The related technologies appearing here deserve attention. Maekawa Corporation's "Kankyo Shin" carbonizing furnace carbonizes waste at 700 degrees Celsius, reducing its volume to one-fortieth of its original size. Koike Oxygen Industries' arc plasma melting furnace "DOMIWS" melts needles and glass at 1,600°C and solidifies them as slag. Nippon Kako's "Trash Busters" sterilizer uses a dry heat sterilization method that combines heat of around 180 degrees Celsius and crushing to render waste harmless in a short time, attracting attention. These devices had a significant advantage in that they replaced the conventional incineration method, allowing waste to be disposed of as regular industrial or general waste.

Institutional changes were also underway: at the end of 2002, dioxin regulations were tightened, making it difficult to use many existing incinerators. At the same time, medical associations and industrial waste federations sought to make waste treatment more transparent and standardized through proper treatment checklists and educational training. In addition, improvements were made to the disposal containers themselves, and special plastic and paper containers were certified as "proper disposal containers.

The scene surrounding medical waste disposal in this era was not simply a matter of technological choice. The voices of the medical community, which emphasized countermeasures against infectious diseases, residents, who demanded environmental preservation, waste disposers, who were pressed by regulations, and government officials and academics, who promoted institutional reform, intersected at the single point of "incineration or sterilization," forming a forum for social dialogue. The echoes of these voices symbolized the "in-between safety and security" that Japanese society faced in the early 2000s.