School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; Research Center for Functional Material & Water Purification Engineering of Shandong Province, Jinan 250022, China.
School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China.
Bioresour Technol. 2021 Apr;326:124728. doi: 10.1016/j.biortech.2021.124728. Epub 2021 Jan 18.
In this work, a laboratory-scale alternating anaerobic/aerobic biofilter (A/O BF) filled with self-made steel slag media was constructed, where the integrated biological and crystalline phosphorus removal process was realized to remove phosphorus and achieve phosphorus recovery from wastewater. Phosphorus accumulating organisms (PAOs) were successfully enriched within 30 days operation, the maximum phosphate removal efficiency was close to 80% under the optimal conditions with the anaerobic time of 34 h, HRT of 4 h and influent COD of 300 mg/L. The analysis of SEM-EDS and XRD indicated that hydroxyapatite (HAP) crystals were formed inside biofilms without addition of chemical reagents. The high phosphate environment created by PAOs and the release of Ca from the steel slag media might be responsible for the generation of HAP. These findings have crucial implications for the application BF technology to remove and recover phosphorus from wastewater.
在这项工作中，构建了一个使用自制钢渣介质的实验室规模交替厌氧/好氧生物滤池（A/O BF），实现了综合生物和结晶磷去除工艺，以去除废水中的磷并实现磷回收。在 30 天的运行中成功富集了聚磷菌（PAOs），在最佳条件下，厌氧时间为 34 小时、HRT 为 4 小时和进水 COD 为 300mg/L 时，磷酸盐去除效率接近 80%。SEM-EDS 和 XRD 分析表明，无需添加化学试剂即可在生物膜内形成羟基磷灰石（HAP）晶体。PAOs 创造的高磷环境和钢渣介质中 Ca 的释放可能是 HAP 生成的原因。这些发现对于 BF 技术在去除和回收废水中磷的应用具有重要意义。
