Phosphorus recovery from fosfomycin pharmaceutical wastewater by wet air oxidation and phosphate crystallization |
| |
Authors: | Qiu Guanglei Song Yonghui Zeng Ping Xiao Shuhu Duan Liang |
| |
Institution: | a Chinese Research Academy of Environmental Sciences, Dayangfang 8, Anwai Beiyuan, Beijing 100012, China b College of Water Science, Beijing Normal University, Xinjiekou Wai Street 19, Beijing 100875, China |
| |
Abstract: | Fosfomycin pharmaceutical wastewater contains highly concentrated and refractory antibiotic organic phosphorus (OP) compounds. Wet air oxidation (WAO)-phosphate crystallization process was developed and applied to fosfomycin pharmaceutical wastewater pretreatment and phosphorus recovery. Firstly, WAO was used to transform concentrated and refractory OP substances into inorganic phosphate (IP). At 200 °C, 1.0 MPa and pH 11.2, 99% total OP (TOP) was transformed into IP and 58% COD was reduced. Subsequently, the WAO effluent was subjected to phosphate crystallization process for phosphorus recovery. At Ca/P molar ratio 2.0:1.0 or Mg/N/P molar ratio 1.1:1.0:1.0, 99.9% phosphate removal and recovery were obtained and the recovered products were proven to be hydroxyapatite and struvite, respectively. After WAO-phosphate crystallization, the BOD/COD ratio of the wastewater increased from 0 to more than 0.5, which was suitable for biological treatment. The WAO-phosphate crystallization process was proven to be an effective method for phosphorus recovery and for fosfomycin pharmaceutical wastewater pretreatment. |
| |
Keywords: | Wet air oxidation Fosfomycin pharmaceutical wastewater Organic phosphorus Magnesium ammonium phosphate Calcium phosphate Phosphorus recovery |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|