Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge
The effect of potassium ferrate (PF) and straw fiber (SF) on the strength of cement-based solidified municipal sludge, including the influence of reducing the organic matter in the sludge on the efficiency of the hydration of the cement, was studied. Single-factor tests, orthogonal tests, and linear...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-11-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/86/9/2358 |
| _version_ | 1811313740159647744 |
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| author | Yahong Yang Weixin Xu Qiyong Yang Li Sun Yuxuan Dai Zhen Liu Ming Zeng Wenjie Yang Caihua Zhou |
| author_facet | Yahong Yang Weixin Xu Qiyong Yang Li Sun Yuxuan Dai Zhen Liu Ming Zeng Wenjie Yang Caihua Zhou |
| author_sort | Yahong Yang |
| collection | DOAJ |
| description | The effect of potassium ferrate (PF) and straw fiber (SF) on the strength of cement-based solidified municipal sludge, including the influence of reducing the organic matter in the sludge on the efficiency of the hydration of the cement, was studied. Single-factor tests, orthogonal tests, and linear weighted optimization methods were used to obtain suitable ratios to meet practical requirements, and then SEM and XRD analyses were used to explore the solidification mechanism. The results showed that PF and SF had significant influence on the strength, with SF having the greatest influence and the strength increasing with the amount of both admixtures, and cement had no significant influence on the strength. After linear weighting optimization, the ideal dosage was found to be 20% cement, 20% PF, and 5% SF, which produced a solidified sludge that had an strength of 126.87 kPa, far higher than the 50 kPa required to qualify for disposal in landfills. Analysis of the mineral content and microstructure showed that PF and SF could promote cement hydration and produce more hydration products, and the density of the optimized sample was much higher than that of the raw sludge and a sludge sample mixed with 20% cement alone.
HIGHLIGHTS
Potassium ferrate and straw fibers synergistically enhanced the effect of cement-based solidification of municipal sludge and had significant influence.;
Orthogonal tests were combined with linear weighted optimization to obtain the suitable ratio.;
Potassium ferrate and straw fibers could reduce the influence of organic matter in municipal sludge on cement hydration efficiency and promote cement hydration reaction.; |
| first_indexed | 2024-04-13T10:59:01Z |
| format | Article |
| id | doaj.art-92484a3a7e58473386f79325eaf3ac05 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-04-13T10:59:01Z |
| publishDate | 2022-11-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-92484a3a7e58473386f79325eaf3ac052022-12-22T02:49:27ZengIWA PublishingWater Science and Technology0273-12231996-97322022-11-018692358237410.2166/wst.2022.336336Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludgeYahong Yang0Weixin Xu1Qiyong Yang2Li Sun3Yuxuan Dai4Zhen Liu5Ming Zeng6Wenjie Yang7Caihua Zhou8 School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China Jiujiang Municipal Bureau of Ecology and Environment, Jiujiang, Jiangxi 332005, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China College of Resources & Environment, Jiujiang University, Jiujiang, Jiangxi, 332005, China The effect of potassium ferrate (PF) and straw fiber (SF) on the strength of cement-based solidified municipal sludge, including the influence of reducing the organic matter in the sludge on the efficiency of the hydration of the cement, was studied. Single-factor tests, orthogonal tests, and linear weighted optimization methods were used to obtain suitable ratios to meet practical requirements, and then SEM and XRD analyses were used to explore the solidification mechanism. The results showed that PF and SF had significant influence on the strength, with SF having the greatest influence and the strength increasing with the amount of both admixtures, and cement had no significant influence on the strength. After linear weighting optimization, the ideal dosage was found to be 20% cement, 20% PF, and 5% SF, which produced a solidified sludge that had an strength of 126.87 kPa, far higher than the 50 kPa required to qualify for disposal in landfills. Analysis of the mineral content and microstructure showed that PF and SF could promote cement hydration and produce more hydration products, and the density of the optimized sample was much higher than that of the raw sludge and a sludge sample mixed with 20% cement alone. HIGHLIGHTS Potassium ferrate and straw fibers synergistically enhanced the effect of cement-based solidification of municipal sludge and had significant influence.; Orthogonal tests were combined with linear weighted optimization to obtain the suitable ratio.; Potassium ferrate and straw fibers could reduce the influence of organic matter in municipal sludge on cement hydration efficiency and promote cement hydration reaction.;http://wst.iwaponline.com/content/86/9/2358linear weightingmunicipal sludgepotassium ferratesolidificationstraw fiber |
| spellingShingle | Yahong Yang Weixin Xu Qiyong Yang Li Sun Yuxuan Dai Zhen Liu Ming Zeng Wenjie Yang Caihua Zhou Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge Water Science and Technology linear weighting municipal sludge potassium ferrate solidification straw fiber |
| title | Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge |
| title_full | Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge |
| title_fullStr | Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge |
| title_full_unstemmed | Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge |
| title_short | Exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement-based solidified municipal sludge |
| title_sort | exploring the role of potassium ferrate and straw fiber in enhancing the strength of cement based solidified municipal sludge |
| topic | linear weighting municipal sludge potassium ferrate solidification straw fiber |
| url | http://wst.iwaponline.com/content/86/9/2358 |
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