Experimental Study on the Effect of Fulvic Acid in Waste Slurry on Flocculation and Zeta Potential

Yi Yang, Silin Wu and Xianwen Huang
Additional contact information
Yi Yang: The Water-Development Planning & Research Center of Zhejiang Province, Hangzhou 310009, China
Silin Wu: School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Xianwen Huang: School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China

Sustainability, 2021, vol. 13, issue 14, 1-11

Abstract: The waste slurry produced by the dredging of urban rivers needs to be dewatered before being reused sustainably. As a large amount of plant debris accumulates in sediment, humus-like substances become one of main components in waste slurry. In light of the lack of research on the effect of fulvic acid (FA) in waste slurry on flocculation and separation, this paper carried out experimental research, including the effect of FA content on flocculation and filtration, as well as flocculation and filtration experiments of eight different sources of waste slurry. The results show that if only the FA content in the slurry is changed, the effect of FA on flocculation and separation is significant when the FA content is 0~3%, but it is not obvious when the FA content exceeds 3%. The flocculation and filtration results of eight different sources of river-dredged waste slurry are obviously different; the D 10 increment can differ by nearly 10 times, and the specific resistance to filtration (SRF) differs by 2 orders of magnitude. However, FA is not a sensitive factor affecting the flocculation results. FA mainly affects the results by affecting the zeta potential of the slurry. Therefore, in the dewatering design of waste slurry, only the zeta potential needs to be considered.

Keywords: waste slurry; fulvic acid; flocculation; filtration; zeta potential (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/14/7784/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/14/7784/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:14:p:7784-:d:592988

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().