Installation of Disposer (Food Waste Crusher)

Installation of the disposer alone is not possible

A disposer (food waste grinder) is a device that finely grinds food waste such as vegetable scraps and fish bones from the kitchen and flushes it down the sewer pipes with water.
Using a disposer alone can cause the remaining food waste to decompose and produce unpleasant odors, or lead to blockages in the drainage pipes within residential areas or the main sewer lines.
Additionally, when food waste flows in with regular sewage, it can exceed the processing capacity of sewage treatment plants and cause deterioration of water quality in public water bodies.
Due to these issues, the city does not permit the installation of disposers as standalone units.

About the Installation of the Disposal Drainage Treatment System

The city does not allow the installation of disposers as standalone units, but you can install a "Disposer Wastewater Treatment System" that includes a wastewater treatment device.
However, this is limited to certified products that have received evaluation in accordance with the "Performance Standards (Draft) for Disposer Wastewater Treatment Systems for Sewers" created by the Japan Sewerage Association.
If you wish to install this system, please notify the Sewerage Division.

Notification Regarding the Disposal Drainage Treatment System

The installation and use of the disposal processing system require the submission of the following documents.

• Notification of Installation of Disposal Drainage Treatment System
• Building Layout Plan
• Drainage Equipment Design Drawing
• Copy of the specifications showing the structure and performance of the equipment
• Copy of the Maintenance Management Service Contract
• Maintenance and Management Plan
• User Inheritance Guarantee Document
• Copy of certification related to the disposal system
• Others, please refer to the "Disposal Drainage Treatment System Installation Guidelines"

Reference

Disposer Wastewater Treatment System Notification
Guidelines for Installation and Handling of Disposer Wastewater Treatment Systems, etc.