Journal
BIORESOURCE TECHNOLOGY
Volume 262, Issue -, Pages 294-301Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.04.050
Keywords
Waste activated sludge (WAS); Zero valent iron (ZVI)/peroxymonosulfate (PMS); Thermal; Dewaterability; Extracellular polymeric substances (EPS)
Funding
- National Natural Science Foundation of China, China [51739004, 21776066, 51408551]
- Foundation Innovative Research Groups of the National Natural Science Foundation of China [51521006]
- Key research and development project of Hunan Province, China [2016SK2015]
- Planned Science and Technology Project of Zhejiang Province and Ningbo City, China [2015C33012, 2015A610253]
Ask authors/readers for more resources
In this study, zero valent iron (ZVI) activated peroxymonosulfate (PMS) as novel technique (i.e. ZVI-PMS technology) was employed to enhance sludge dewatering. In optimal sludge dewatering conditions of ZVI and KHSO5 dosages, the specific resistance to filtration (SRF) was reduced by 83.6%, which was further decreased to 90.6% after combination of ZVI-PMS with thermal treatment at 50 degrees C (i.e. ZVI-PMS-T technology). Subsequently, the ESR spectrum and quenching tests demonstrated that OH%, rather than SO4 center dot-, was predominant radicals in ZVI-PMS conditioning. Thereafter, the variation of physicochemical properties and the distributions and compositions of extracellular polymeric substances (EPS) were further investigated to uncover the influence of these techniques on sludge bulk properties. The results indicated that sludge particles were disintegrated into smaller particles and surface charges were neutralized, sludge flowability were elevated obviously after treatments. In ZVI cycle experiment, the high dewatering efficiency was maintained by ZVI-PMS and ZVI-PMS-T pretreatment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available