Phosphorus recovery from sludge by pH enhanced anaerobic fermentation and vivianite crystallization
Li, Changyu1,2; Sheng, Yanqing1; Xu, Hengduo1
Source PublicationJOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
2021-02-01
Volume9Issue:1Pages:8
KeywordAnaerobic fermentation Phosphorus fraction Phosphorus recovery Waste active sludge Vivianite
DOI10.1016/j.jece.2020.104663
Corresponding AuthorSheng, Yanqing(yqsheng@yic.ac.cn)
AbstractPhosphorus (P) shortage is a global issue. However, P recovery from waste activated sludge (WAS) has huge potential. In this study, an innovative method for the recovery of P from WAS via pH adjustment-enhanced anaerobic fermentation (AF) and vivianite crystallization was developed. The results indicate that P could be effectively released from WAS to the supernatant under an appropriate pH during AF. P release efficiency increased by 31.6 % at pH 5.0 and 26.1 % at pH 11.0 compared to the control. Over 99 % of the P in the liquid could be recovered by subsequent vivianite crystallization, and similar to 60 % total P recovery efficiency was obtained. The scanning electron microscopy and X-ray diffraction analyses showed that the co-precipitation of Ca2+ and Mg2+ affected vivianite purity. The recovered vivianite purity from the pH 11.0 supernatant (91.39 %) was higher than the pH 5.0 supernatant (85.44 %) because of lower Ca2+ and Mg2+ ions in the former. In addition, the heavy metals in the recovered vivianite were lower than their own risk thresholds. This study provides new insights into the recovery of P from WAS by pH adjustment-enhanced AF and vivianite crystallization.
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences ; National Nature Science Foundation of China ; Key Project of the Research and Development Plan of Yantai ; Key Research and Development Program of Shandong Province
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS IDWOS:000615071800005
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/27436
Collection中科院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorSheng, Yanqing
Affiliation1.Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Chunhui Rd 17, Yantai 264003, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Changyu,Sheng, Yanqing,Xu, Hengduo. Phosphorus recovery from sludge by pH enhanced anaerobic fermentation and vivianite crystallization[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2021,9(1):8.
APA Li, Changyu,Sheng, Yanqing,&Xu, Hengduo.(2021).Phosphorus recovery from sludge by pH enhanced anaerobic fermentation and vivianite crystallization.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,9(1),8.
MLA Li, Changyu,et al."Phosphorus recovery from sludge by pH enhanced anaerobic fermentation and vivianite crystallization".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9.1(2021):8.
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