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Article

Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands

by 1, 1,2, 1,2,*, 3, 1,2 and 1,2
1
College of Environment, Hohai University, Nanjing 210098, China
2
Ministry of Education, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China
3
Assistant Researcher, Rural Center, Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Nanjing 210042, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(15), 2637; https://doi.org/10.3390/ijerph16152637
Received: 20 May 2019 / Revised: 19 July 2019 / Accepted: 20 July 2019 / Published: 24 July 2019
(This article belongs to the Special Issue Water Quality Improvement and Ecological Restoration)
The recycling of waterworks sludge has become a trending issue because it not only solves the problem of difficult disposal but also saves land resources. This paper aimed to provide a new idea for the utilization of waterworks sludge to form ceramsite and to purify sewage. The specific surface area, average pore size, and pore volume of the made ceramsite were 8.15 m2/g, 8.53 nm, and 1.88 cm2/g, respectively. The made ceramsite was applied in a vertical-flow constructed wetland, and the removal efficiency of nitrogen, phosphorus and organic matter in sewage were investigated under the conditions of different start-up periods, hydraulic retention times, matrix filling heights and water quality. The removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and total phosphorus (TP) in the constructed wetlands were stable at 70%, 60%, and 79%, respectively. This constructed wetland with a ceramic matrix has certain advantages in the total amount of denitrifying microorganisms, with a proportion of 14.92%. The results prove the feasibility of preparing ceramsite from waterworks sludge and applying it as a matrix in a constructed wetland to purify sewage. View Full-Text
Keywords: waterworks sludge; constructed wetland; ceramsite waterworks sludge; constructed wetland; ceramsite
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MDPI and ACS Style

Wang, Y.; Yang, J.; Xu, H.; Liu, C.; Shen, Z.; Hu, K. Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands. Int. J. Environ. Res. Public Health 2019, 16, 2637. https://doi.org/10.3390/ijerph16152637

AMA Style

Wang Y, Yang J, Xu H, Liu C, Shen Z, Hu K. Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands. International Journal of Environmental Research and Public Health. 2019; 16(15):2637. https://doi.org/10.3390/ijerph16152637

Chicago/Turabian Style

Wang, Yaning, Jinhu Yang, Hang Xu, Chenwei Liu, Zhen Shen, and Kai Hu. 2019. "Preparation of Ceramsite Based on Waterworks Sludge and Its Application as Matrix in Constructed Wetlands" International Journal of Environmental Research and Public Health 16, no. 15: 2637. https://doi.org/10.3390/ijerph16152637

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