A comparison of the coagulation performance of PAFC and FeSO4 for the treatment of leach liquor from Stevia processing
文献类型：期刊论文
| 作者 | Liu, Xun; Graham, Nigel; Liu, Ting; Cheng, Shuangwu; Yu, Wenzheng
|
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 255页码:- |
| 关键词 | Stevia Leach liquor treatment Coagulation PAFC FeSO4 Membrane fouling |
| ISSN号 | 1383-5866 |
| 英文摘要 | Stevioside, mainly extracted from Stevia rebaudiana, is an important non-caloric additive for food, beverages and flavoring, and an alternative natural sweetener for people with diabetes and obesity. Pretreatment of Stevia rebaudiana, involving coagulation and filtration, is used to remove impurities from the leach liquor of stevia. Commercially, ferrous sulfate (FeSO4) is commonly used as a coagulant in the factory, but large amounts of soluble Fe(II)-protein complexes remain in the filtrate, which is potentially of health concern. In this study, the removal of impurities (particles and organic compounds) in leach liquor of stevia by polymeric aluminium ferric chloride (PAFC) was compared to FeSO4, through simulated coagulation and membrane filtration processes. The results showed that PAFC has a superior coagulation efficiency to FeSO4, achieving a very high removal of the impurities in the leaching solution without complexation, and which was not affected by the solution pH. In the subsequent membrane filtration, the flux was found to be influenced (reduced) by the interaction between organic matter (e.g. proteins) and nanoparticles in the cake layer, which formed a dense and compact structure with a lower permeability. Although using FeSO4 had a greater membrane flux, the results have shown significant advantages in using PAFC as an alternative coagulant to FeSO4 in the pre-treatment of leach liquor from Stevia processing. The higher treatment performance and acceptable membrane flux could be obtained by adjusting the pH of the leaching solution to 7 (addition of CaO), at the optimal PAFC dose (5000 mg/L). |
| WOS研究方向 | Engineering, Chemical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46167]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Dongtai Haorui Biotechnol Co Ltd, Dongtai, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Drinking Water Sci & Technol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Beijing Inst Technol, Sch Chem & Chem Engn, Beijing 100081, Peoples R China 4.Imperial Coll London, Dept Civil & Environm Engn, London SW7 2AZ, England |
| 推荐引用方式 GB/T 7714 | Liu, Xun,Graham, Nigel,Liu, Ting,et al. A comparison of the coagulation performance of PAFC and FeSO4 for the treatment of leach liquor from Stevia processing[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,255:-. |
| APA | Liu, Xun,Graham, Nigel,Liu, Ting,Cheng, Shuangwu,&Yu, Wenzheng.(2021).A comparison of the coagulation performance of PAFC and FeSO4 for the treatment of leach liquor from Stevia processing.SEPARATION AND PURIFICATION TECHNOLOGY,255,-. |
| MLA | Liu, Xun,et al."A comparison of the coagulation performance of PAFC and FeSO4 for the treatment of leach liquor from Stevia processing".SEPARATION AND PURIFICATION TECHNOLOGY 255(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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