Composting and Sales of Sewage Sludge for a Regional Circular Society!

Background of Equipment Introduction

Former Sada Town has been implementing the Agricultural Community Drainage Facility Improvement Project since 1981 to improve water quality for agricultural drainage and living environments.

In the fiscal year 2001, while all the planned areas were completed, issues such as some areas exceeding the planned sludge processing capacity arose; therefore, from the perspective of resource recycling, we examined the sludge processing methods and composting facilities and decided to introduce new equipment.

Reasons for Choosing MIRAIE

We received proposals for composting facilities from several companies and made our selection based on cost comparisons in terms of construction and maintenance costs, as well as actual performance.

Evaluation After Introduction

Initially, we only composted sludge, but the high moisture content prevented it from becoming a usable product.

However, as a result of the improvement proposal from MIRAIE and the management company to add auxiliary materials, we have successfully commercialized the product and are now selling approximately 3,500 bags (10 kg per bag) annually.