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December 3, 2018 New Technology Registered on JS Innovation Program Advanced rotary press dehydrator reduces LCC and CO2emissions

Japan Sewage Works Agency (JS) has been running JS Innovation Program* since 2011. The program aims to encourage the development of new technologies that meet various needs of municipal wastewater business and facilitate the adoptions of the innovative technologies to our entrusted projects.
JS adds the following new technology on JS Innovation Program.

Type 3 Rotary press Dehydrator

* Note that JS Innovation Program verifies registered technologies for their applicability only at JSf entrusted projects.

Type 3 rotary press dehydrator retains many advantages of type 2 dehydrator such as simple structure, light weight, small footprint, sealed structure, and requiring small amount of washing water. The new dehydrator has been added new functions of electric conduction and after-adding of polyferric sulfate to achieve further dehydration of sludge.

The common mechanism of dehydration between Type 1, 2, & 3 rotary press dehydrator

vertical restrictor

New function

electric, polyfeffic sulfate

*Reductions of water content rate are compared values with type 2 dehydrator.

Flow diagram

Targeted sewage sludge

Mixed raw sludge that is generated through the conventional activated sludge (CAS) process and mechanically thickened

* Researchers verified the dehydration performance of the new dehydrator for some kind of the untargeted sludge by test machines.

Recommended conditions

Example of application

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