| 基于膜分离技术的生物聚合铁的制备 |
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| 引用本文： | 关晓辉,张东辉,张明媛,秦玉华.基于膜分离技术的生物聚合铁的制备[J].化工学报,2008,59(10):2622-2626. |
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| 作者姓名： | 关晓辉 张东辉 张明媛 秦玉华 |
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| 作者单位： | 东北电力大学化学工程学院 |
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| 摘 要： | 开展基于膜分离技术优化反复序批式工艺制备生物聚合铁（BPFS）的技术研究。考察了应用聚偏氟乙烯中空纤维微滤膜（PVDF）对微生物的分离效果，Fe2+的生物催化氧化速率，制备周期及膜的污染与处理的情况。研究表明，PVDF膜可有效分离微生物，显著提高原液中的生物量。在优化工艺的基础上，制备了全铁含量分别为60、80、100 kg·m-3 BPFS，Fe2+的生物催化氧化速率分别达到1.75、1.85、1.43 g·L-1·h-1，制备周期分别为15.5、21、40 h，比工艺优化前分别缩短了38%、42%、18%，反应液中的生物量达到108 个·ml-1数量级。实验中发现，随着分离次数和全铁含量的增加，膜污染加剧，膜通量下降;采用0.2 mol·L-1的草酸钠和0.2 mol·L-1硫酸的混合溶液对PVDF膜进行清洗，可基本清除膜表面的污染物，满足分离要求。
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| 关 键 词： | 微生物 生物聚合铁 制备周期 膜通量 |
| 收稿时间： | 2008-1-25 |
| 修稿时间： | 2008-6-10
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Preparation of bio-polymeric ferric sulfate based on membrane separation technology |
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| GUAN Xiaohui,ZHANG Donghui,ZHANG Mingyuan,QIN Yuhua.Preparation of bio-polymeric ferric sulfate based on membrane separation technology[J].Journal of Chemical Industry and Engineering(China),2008,59(10):2622-2626. |
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| Authors: | GUAN Xiaohui ZHANG Donghui ZHANG Mingyuan QIN Yuhua |
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| Abstract: | Based on the membrane separation technology, bio polymeric ferric sulfate (BPFS) was prepared with the optimized sequential batch processThe effect on separation of microorganisms, bio catalytical oxidation rate of Fe2+, preparation periods and membrane pollution were investigated by using poly vinylidene fluoride hollow fiber membrane (PVDF) to separate microorganismsThe results showed that the biomass in BPFS obviously increased through the membrane separation processBy using the optimized process, the BPFS with total iron contents of 60kg·m-3, 80kg·m-3, 100kg·m-3 were preparedThe bio catalytical oxidation rate of Fe2+ reached 1.75 g·L-1·h-1, 1.85 g·L-1·h-1, 1.43 g·L-1·h-1 , preparation periods were 155h, 21h, 40h, a decrease by 38%, 42%, 18% respectively as against the process before optimizationThe biomass in BPFS reached the order of magnitude of 108 num·ml-1With the increase of separation time and the content of total iron of BPFS,membrane pollution was intensified seriously, and membrane flux decreased obviouslyPVDF was cleaned by a mixture of 0.2 mol·L-1sodium oxalate and 0.2 mol·L-1sulfuric acid, and the scavenger can clean out the fouls from the membrane surface and satisfy the separation requirement. |
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| Keywords: | microorganisms bio-polymeric ferric sulfate preparation periods membrane flux |
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