Economical Sodium Hypochlorite Generator（ECO SUNNY）
Produce hypochlorite from waste salt and recycle as disinfectant
In Japan, municipal solid waste is mostly incinerated to reduce its volume before the final landfill disposal due to limitations in available land and capacity of landfills. As the incineration residue contains high concentrations of salt, the leachate is also rich in salt and can be hazardous for agriculture when discharged without proper treatment. Desalination is one of the alternatives to remove the high salt content from the leachate. However, the high operational cost of brine treatment, which is generated from the desalination process, has been a critical challenge.
Developed Eco-Sodium Hypochlorite system in collaboration with Matsuyama City
At the Yokotani Landfill Center in Matsuyama City, evaporation was used for the treatment of concentrated brine in the desalination facilities. Dried salt was obtained as by-product which had not been effectively used. Here, we introduced the electrolysis of concentrated brine, in collaboration with Matsuyama City, to produce an economically valuable by-product, sodium hypochlorite and potassium hypochlorite (named Eco-Sodium Hypochlorite).
Eco-Sodium Hypochlorite is reused as sanitizer at sewage treatment plant
This is the first full-scale plant in Japan, where Eco-Sodium Hypochlorite is produced from concentrated brine during landfill leachate treatment and reused as a disinfectant in a sewage treatment plant nearby.
The produced Eco-Sodium Hypochlorite has equivalent disinfection effect as other commercial products and can be used in same manner with stable and long lasting effect.