HAO Xiao-di,YU Wen-bo,SHI Chen,et al.Potential Analysis and Market Prospects of Phosphorus Recovery from the Bottom Ashes of Sludge Incineration[J].China Water & Wastewater,2021,37(4 4):5-10.
Potential Analysis and Market Prospects of Phosphorus Recovery from the Bottom Ashes of Sludge Incineration
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
4 4
Page:
5-10
Column:
Date of publication:
2021-02-17
- Keywords:
- wastewater treatment; sludge incineration; bottom ash; phosphorus recovery; recovered phosphate fertilizers; rock phosphate fertilizers
- Abstract:
- Phosphorus resources are irreplaceable and non-renewable either. Modern industry grabs phosphorus ores mainly for synthesizing phosphate fertilizers, and most of phosphorus (90%) entering human bodies via the food chains (crops, vegetables and meats) is finally transported into wastewater (without excreta returning to farmlands) discharged by human beings. Although phosphorus entering wastewater only accounts for a small proportion of phosphate ores (<5%) compared to exploited P-ores, this is the only site possibly recovering phosphorus besides animal manure and straws, which takes a share of >25% of phosphorus transported into crops. Under the circumstance of giving up excreta returning to farmlands, thus, recovering phosphorus from wastewater is very important. There are many approaches to recovering phosphorus and its products from wastewater nowadays. Phosphorus recovery relating to the bottom ashes of excess sludge incineration could reach up to the highest extent, up to 90%. Based on the global phosphorus crisis and its flowing patterns and evaluations in China, the article first revealed the importance and urgency of phosphorus recovery, followed by summarizing and analyzing the associated techniques and potential applications of phosphorus recovery from the bottom ashes. According to the fertilizer values and estimated prices, recovered phosphorus fertilizers from the bottom ashes could be finally believed to have a better market prospect than synthesized phosphate fertilizers, in particular which is sustainable.
Last Update:
2021-02-17