The city of Gojo located in Nara Prefecture is full of natural richness and romantic history with world heritage "Omine Okugakemichi."
In March 2015, we completed a new type of night soil treatment plant that incorporates state-of-the-art material recycling technology that takes environmental conservation into consideration.

In Gojo City, while it was desirable to renew its aging night soil treatment facilities after 34 years of operation, public sewerage improvement projects were also proceeding, and the volume of night soil and other waste was expected to be reduced. Therefore, the key to the problem solution was to treat sewage more economically.

In response to the demand for "construction of economically efficient sludge treatment facility for night soil and septic tanks," we selected a direct dewatering (pre-dehydration) denitrification treatment system, which features a simple treatment flow, and reduced both construction and maintenance costs.

The "Subsidy for Establishment of a Sound Material-Cycle Society" under the jurisdiction of the Ministry of the Environment is utilized by adopting the sludge to combustion improver transformation and the phosphorus recovery method (MAP method, the first adopted project for Swing).
For direct dehydration of night soil, we adopted shaft sliding type screw press dehydrator which is easy to maintain and the most used in the industry for combustion improver.
For separated wastewater treatment, we have introduced a denilite system (our new standard technology) that has the same or greater performance as the membrane separation high-load denitrification process without using pre-treatment facility or membrane separation equipment. It also contributes the reduction of LCC.

We undertook all work (Design-Build), from facility design to material procurement, civil engineering and construction, machinery and electrical equipment installment, while giving consideration to the safety of the local community.