Upcycling of Wastewater Sludge Incineration Ash as a 3D Printing Technology Resource (2021-07)¶
Ki Dongwon, Kang Shin,
Journal Article - Frontiers in Sustainability, Vol. 2
Abstract
Recycling of usable resources from waste must be prioritized to adhere to the circular economy policy implemented worldwide. This study aims to use wastewater sludge incineration ash (WSIA), which is a by-product of wastewater sludge treatment processes, in the 3D printing industry as a sustainable material. First, we explored the stability of incinerated ash generated from a wastewater treatment facility in Seoul by evaluating its physical (water content, organic matter content, and particle size) and chemical (oxide compound composition) characteristics. Composition ratios of the predominant oxides of silicon (SiO2), aluminum (Al2O3), phosphorous (P2O5), iron (Fe2O3), and calcium (CaO) were stable for 6 months. This finding indicates the potential for the incinerated ash to be commercially viable as a powder-bed 3D printed geopolymer. We then examined the optimal ratio of admixtures between the incinerated ash and ultrarapid hardening cement and the following post-treatment process method as a curing stage. The composite material made with 25% WSIA exhibited stability during the curing stage using alkaline solutions, and its compressive strength and water absorption were in accordance with the values recommended by the Korean Standard for decorative concrete blocks (KS F 4038). Additionally, a geopolymer prototype with 25% incinerated ash was produced. To support efficient upcycling of WSIA, long-term environmental and functional monitoring of the final product, effects of incinerated ash particle sizes, and post-treatment process times were further investigated to
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4 References
- Lim Sungwoo, Buswell Richard, Le Thanh, Austin Simon et al. (2011-07)
Developments in Construction-Scale Additive Manufacturing Processes - Nematollahi Behzad, Xia Ming, Sanjayan Jay (2017-07)
Current Progress of 3D Concrete Printing Technologies - Nematollahi Behzad, Xia Ming, Sanjayan Jay (2019-07)
Post-processing Methods to Improve Strength of Particle-Bed 3D Printed Geopolymer for Digital Construction Applications - Wu Peng, Wang Jun, Wang Xiangyu (2016-04)
A Critical Review of the Use of 3D Printing in the Construction Industry
BibTeX
@article{ki_kang_park.2021.UoWSIAaa3PTR,
author = "Dongwon Ki and Shin Young Kang and Kwang-Min Park",
title = "Upcycling of Wastewater Sludge Incineration Ash as a 3D Printing Technology Resource",
doi = "10.3389/frsus.2021.697265",
year = "2021",
journal = "Frontiers in Sustainability",
volume = "2",
}
Formatted Citation
D. Ki, S. Y. Kang and K.-M. Park, “Upcycling of Wastewater Sludge Incineration Ash as a 3D Printing Technology Resource”, Frontiers in Sustainability, vol. 2, 2021, doi: 10.3389/frsus.2021.697265.
Ki, Dongwon, Shin Young Kang, and Kwang-Min Park. “Upcycling of Wastewater Sludge Incineration Ash as a 3D Printing Technology Resource”. Frontiers in Sustainability 2 (2021). https://doi.org/10.3389/frsus.2021.697265.