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Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation
Ritigala, Tharindu; Demissie, Hailu; Chen, Yanlin; Zheng, Jiaxi; Zheng, Libing; Zhu, Jinxing; Fan, Hua; Li, Jiao; Wang, Dongsheng; Weragoda, Sujithra K.; Weerasooriya, Rohan; Wei, Yuansong
2021-06
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume104Pages:430-443
AbstractCoagulation-based pre-treatment efficiency of high strength digestate of food waste (HS-DFW) anaerobic digestion is negated by organic ligand-catalyzed decomposition of coagulants. In this study, an efficient HSDFW pre-treatment method, magnetic seeds (MS) coagulation, was employed by using highly stable Keggin Al-30 nanocluster (PAC(30)), MS and polyacrylamide (PAM), and its operation was optimized by evaluating the performance of removing turbidity, total suspended solids (TSS), chemical oxygen demand (COD), and total phosphorous (TP) phosphate. Results showed that at the optimum dosage of 4.82 g/L, PAC(30) demonstrated excellent removals as high as 98.93% +/- 0.1% of turbidity, 98.04% +/- 0.1% of TSS, 58.28% +/- 0.3% of total COD, 99.98% +/- 0.01% of TP and 99.50% +/- 0.01% of dissolved phosphate, respectively. Apparent molecular weight (AMW) and three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy analyses demonstrated more efficient removal of dissolved organic matter (DOM), particularly non-biodegradable and hydrophobic components by PAC(30) than commercial coagulant. The sedimentation was much improved from 40 min by coagulation/flocculation to about 5 min settling by MS coagulation. The PAC(30) based magnetic coagulation (MC) presents theoretical guidance on a cost-effective and much less footprint pre-treatment alternative for high strength wastewater. (C) 2021 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
Department水污染控制实验室
KeywordMagnetic coagulation Keggin nanocluster Pre-treatment Removal mechanism Cost analysis
WOS Research AreaEnvironmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46059
Collection水污染控制实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Water Pollut Control Technol, Beijing 100085, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Beijing Environm Engn Technol Co Ltd, Beijing 100101, Peoples R China
6.Natl Water Supply & Drainage Board, Katugastota 20800, Sri Lanka
Recommended Citation
GB/T 7714
Ritigala, Tharindu,Demissie, Hailu,Chen, Yanlin,et al. Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,104:430-443.
APA Ritigala, Tharindu.,Demissie, Hailu.,Chen, Yanlin.,Zheng, Jiaxi.,Zheng, Libing.,...&Wei, Yuansong.(2021).Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation.JOURNAL OF ENVIRONMENTAL SCIENCES,104,430-443.
MLA Ritigala, Tharindu,et al."Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation".JOURNAL OF ENVIRONMENTAL SCIENCES 104(2021):430-443.
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