[1]张彦平,呼瑞琪,李一兵,等.高铁酸盐氧化剩余污泥溶胞减量研究[J].中国给水排水,2020,36(15):59-64.
　ZHANG Yan-ping,HU Rui-qi,LI Yi-bing,et al.Lysis and Reduction of Excess Sludge by Ferrate Oxidation[J].China Water & Wastewater,2020,36(15):59-64.
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高铁酸盐氧化剩余污泥溶胞减量研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷 期数: 2020年第15期 页码: 59-64 栏目: 出版日期: 2020-08-01
Title:
Lysis and Reduction of Excess Sludge by Ferrate Oxidation
作者:
张彦平1,呼瑞琪2,李一兵1,李静1,张千1
(1.河北工业大学土木与交通学院河北省土木工程技术研究中心，天津300401；2.天津中怡建筑规划设计有限公司，天津300193)
Author(s):
ZHANG Yan-ping1，HU Rui-qi2，LI Yi-bing1，LI Jing1，ZHANG Qian1
(1. Civil Engineering Technology Research Center of Hebei Province, School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China； 2.Tianjin Zhongyi Architecture and Planning Design Co. Ltd., Tianjin 300193, China)
关键词:
高铁酸盐; 剩余污泥; 氧化; 污泥减量
Keywords:
ferrate; excess sludge; oxidation; sludge reduction
摘要:
采用高铁酸盐对剩余污泥进行氧化以实现污泥减量化。结果显示:高铁酸盐对污泥的氧化反应迅速，并且在氧化过程中可生成中间态氧化物；反应5 min后，MLVSS和VSS/SS值快速降低，表明EPS及污泥细胞被氧化破解，其内部物质释放出来，导致TPN、SPN、多糖、SCOD、TN和TP值均显著增加；随着反应时间的延长，SCOD和多糖增加缓慢，TPN、SPN、TN和TP最终趋于稳定，这是由于Fe(Ⅵ)及其中间态氧化物能继续与胞内溶出物反应，且Fe(Ⅵ)随时间延长逐渐被消耗所致。紫外-可见光扫描结果表明，污泥细胞可被进一步氧化为小分子有机物，导致紫外区吸光度值显著增加。显微镜检照片显示，高铁酸盐在氧化污泥的过程中，逐步破坏污泥絮体结构，导致细胞裸露，进而被氧化、破碎。
Abstract:
Ferrate was used to oxidize excess sludge to realize reduction. The sludge was oxidized quickly by the ferrate, and intermediate oxides were formed during the reaction. After reaction of 5 min, MLVSS and VSS/SS decreased rapidly, which indicated that EPS and sludge cells were oxidized and cracked， and the internal substances were released. This caused the remarkable increase of TPN, SPN, polysaccharide, SCOD, TN and TP. With the increase of reaction time, SCOD and polysaccharide increased slowly, and TPN, SPN, TN and TP eventually tended to be stable. This was due to the fact that Fe(Ⅵ) and its intermediate oxides could further react with the intracellular dissolution substances. At the same time, the oxidants were gradually consumed over time. According to UV-visible scanning spectrogram results, the sludge cells could be further oxidized to smaller molecules organic matters, which resulted in the absorbance values significantly increased in the ultraviolet region. Microscopic examination showed that ferrate gradually destroyed the structure of sludge floc during the oxidization process. It led to naked cells, which were then oxidized and broken.

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更新日期/Last Update: 2020-08-01