Japan: The problems of phosphate recovery from chicken manure

In two regions of Japan, Miyazaki and Kyusys chicken manure is produced in large quantities. Some can be use to fertilise the land, but one problem is that over use of the phosphorus rich manure can overload the soils with phosphorus. One method used to reduce the manure is to burn it by incineration, however this leave another problem how to dispose of the ash, an ash that was a significant potential secondary resource of phosphorus.

This resource was important as the Japanese has no natural supply of this resource. A method had to be found to extract the valuable resource from the manure without causing any major impact on the environment. Several different methods were looked at like inorganic acid and alkaline treatments, acidification and neutralisation and calcium phosphates. Read more ...

This blog is written by Martin Little, The Global Miller, published and supported by the GFMT Magazine and the International Milling Directory from Perendale Publishers