|Home > NETT21 > Technologies for Resource/Energy Recovery from Sewage Sludge|
|Name of Technology||Phosphorus Recovery from Sewage Sludge Incinerator Ash|
|General Description||This technology is to facilitate beneficial use of sewage incinerator ash
by achieving the following.
(1)To recover phosphorus from incinerator ash for use as a high value-added
raw material for fertilizers.
Schematic diagram of phosphorus recovery technology for incinerator ash
|Components of Technology||The technology comprises the following:
Schematic diagram of technology used to recover phosphorus from incinerator ash
|Features of Technology||This technology has the following features in contrast to the existing technologies used to recover phosphorus from sewage sludge or incinerator ash.
(1) Two types of product are obtained from incinerator ash recycling.
Since the newly developed technology recovers phosphorus from incinerator ash with high phosphorus concentration, it features more compact equipment than existing systems that recover phosphorus from sludge.
(3) Heating value requirements met by surplus heat of incinerator
The required heating value for heating at 50°C to 70°C is provided from the surplus heat of the incinerator.
|Evaluation of Technology||This
technology was developed in the LOTUS Project (Lead to Outstanding technology
for Utilization of Sludge Project) and evaluated and reviewed by the Sewerage
Technology Development Project Committee under the Ministry of Land,
Infrastructure and Transport in Japan in 2007.
[Link to the technology evaluation report]
Note: This technology was developed by NGK Insulators, Ltd. and Waterworks/Sewerage Department of Gifu City Government, and evaluated in 2007. The water and environment business and services of NGK Insulators, Ltd were transferred and have been operated by METAWATER Co., Ltd since 2008.
|Contact Information||METAWATER Co., Ltd.