Technologies for reducing sludge production in wastewater treatment plants: state of the art

Wang, Qilin, Wei, Wei, Gong, Yanyan, Yu, Qiming, Li, Qin, Sun, Jing and Yuan, Zhiguo (2017) Technologies for reducing sludge production in wastewater treatment plants: state of the art. Science of the Total Environment, 587-588 510-521. doi:10.1016/j.scitotenv.2017.02.203

Author Wang, Qilin
Wei, Wei
Gong, Yanyan
Yu, Qiming
Li, Qin
Sun, Jing
Yuan, Zhiguo
Title Technologies for reducing sludge production in wastewater treatment plants: state of the art
Journal name Science of the Total Environment   Check publisher's open access policy
ISSN 1879-1026
Publication date 2017-06-01
Sub-type Article (original research)
DOI 10.1016/j.scitotenv.2017.02.203
Open Access Status Not yet assessed
Volume 587-588
Start page 510
End page 521
Total pages 12
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2018
Language eng
Abstract This review presents the state-of-the-art sludge reduction technologies applied in both wastewater and sludge treatment lines. They include chemical, mechanical, thermal, electrical treatment, addition of chemical un-coupler, and predation of protozoa/metazoa in wastewater treatment line, and physical, chemical and biological pretreatment in sludge treatment line. Emphasis was put on their effect on sludge reduction performance, with 10% sludge reduction to zero sludge production in wastewater treatment line and enhanced TS (total solids) or volatile solids removal of 5-40% in sludge treatment line. Free nitrous acid (FNA) technology seems good in wastewater treatment line but it is only under the lab-scale trial. In sludge treatment line, thermal, ultrasonic (<. 4400. kJ/kg TS), FNA pretreatment and temperature-phased anaerobic digestion (TPAD) are promising if pathogen inactivation is not a concern. However, thermal pretreatment and TPAD are superior to other pretreatment technologies when pathogen inactivation is required. The new wastewater treatment processes including SANI®, high-rate activated sludge coupled autotrophic nitrogen removal and anaerobic membrane bioreactor coupled autotrophic nitrogen removal also have a great potential to reduce sludge production. In the future, an effort should be put on the effect of sludge reduction technologies on the removal of organic micropollutants and heavy metals.
Keyword Anaerobic digestion
Sludge reduction
Waste activated sludge
Wastewater treatment plants
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
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