Open    Access



Phosphorus Recovery from Incinerated Ash of Sewage Sludge by Heat Treatment




Author(s)

Masaaki Takahashi¹,Yukimasa Takemoto¹ and Eiji Yuuki²

Full-Text PDF XML     1040 Views

DOI:10.17265/2161-6213/2019.1-2.003

1. Yokkaichi University, Research Laboratory on Environmental Technology, Kayo-cho 1200, Yokkaichi, Mie 512- 8512, Japan
2. Mie Chuo Kaihatsu Co., Ltd, Hachiya 4713, Yono, Iga, Mie 518-1152, Japan

The phosphorus recovery from incinerated ash of sewage sludge by a heat treatment method was investigated. The incinerated ash of sewage sludge was mixed with sodium hydroxide or sodium carbonate, and treated at 750 °C to 900 °C in aerobic conditions. The phosphorus was successfully recovered as an alkali metal phosphate from the treated ash through water extraction. The recovery rate of the phosphorus reached about 74% to 78%. The optimal condition of the phosphorus recovery and composition of the recovered phosphorus was investigated.

Incinerated ash, sewage sludge, sodium hydroxide, sodium carbonate, phosphorus recovery.