한국폐기물자원순환학회지 제35권 제6호 (p.493-498)

|Special Original Paper|
TiCl4 응집슬러지의 건조 슬러지 및 슬러지 회분으로부터 화학적 인 회수

Chemical Phosphorus Recovery from Ash and Dried Sewage Sludge Produced by Titanium Tetrachloride Flocculation
키워드 :
Dried sludge,Incinerated sludge,Leaching,Phosphorus recovery,TiCl4

목차

Abstract
I. 서 론
II. 연구방법
  1. 실험방법
  2. 분석방법
III. 결과 및 고찰
  1. 건조 슬러지와 슬러지 회분 성상
  2. 건조 슬러지
  3. 슬러지 회분
IV. 결 론
References

초록

We investigated the effects of leaching concentration (0.1 ~ 1.0 M) and time (1 ~ 120 min) on the phosphorus recovery from ash and dried sewage sludge produced by titanium tetrachloride (TiCl4) flocculation by acidic (H2SO4 and HCl) or alkaline (KOH and NaOH) leaching. The extraction efficiencies of dried sludge were 2.7 ~ 12.6% for H2SO4, 2.5 ~ 10.5% for HCl, 3.6 ~ 9.6% for KOH, and 7.1 ~ 9.9% for NaOH with 1 M, and the maximum efficiency was obtained within 45 min. The maximum %P extracted of sludge ash was 83.1 for H2SO4, 80.2 for HCl, 51.2 for KOH, and 51.2 for NaOH with 1 M, obtained within 45 min. The rate constants (min−1) for the leaching of P from sludge ash were found to be 1.199 for H2SO4, 1.026 for HCl, 0.264 for KOH, and 0.622 for NaOH. The P leaching increased with the increase in leaching concentration, and the maximum leaching for ash was obtained within 0.3 M, regardless of acidic or alkaline leaching. The overall results indicate that the ash of TiCl4 flocculated sewage sludge can be treated with H2SO4 to efficiently recover P.