| Title: | Enhancement of the sludge disintegration and nutrients release by a treatment with potassium ferrate combined with an ultrasonic process |
| Author(s): | Li W; Yu N; Liu Q; Li Y; Ren N; Xing D; |
| Address: | "State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: dxing@hit.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2018.04.174 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Sludge disintegration by ultrasound is a promising sludge treatment method. In order to enhance the efficiency of the sludge reduction and hydrolysis, potassium ferrate (K(2)FeO(4)) (PF) was used. A novel method was developed to improve the sludge disintegration-sludge pretreatment by using PF in combination with an ultrasonic treatment (PF?ª++?ª+ULT). After a short-term PF?ª++?ª+ULT treatment, 17.23% of the volatile suspended solids (VSS) were reduced after a 900-min reaction time, which is 61.3% higher than the VSS reduction for the raw sludge. The supernatant soluble chemical oxygen demand (SCOD), total nitrogen (TN), volatile fatty acids (VFAs), soluble protein and polysaccharides increased by 522.5%, 1029.4%, 878.4%, 2996.6% and 801.9%, respectively. The constituent parts of the dissolved organic matter of the sludge products were released efficiently, which demonstrated the positive effect caused by the PF?ª++?ª+ULT. The enhanced sludge disintegration process further alleviates environmental risk and offers a more efficient and convenient method for utilizing sludge" |
| Keywords: | "Biological Oxygen Demand Analysis Bioreactors Fatty Acids, Volatile Hydrolysis Iron Compounds/*analysis Potassium Compounds/*analysis Sewage/*chemistry *Ultrasonics Waste Disposal, Fluid/*methods Degree of disintegration (DD) Potassium ferrate (K(2)FeO(4);" |
| Notes: | "MedlineLi, Wei Yu, Najiaowa Liu, Qian Li, Yiran Ren, Nanqi Xing, Defeng eng Netherlands 2018/04/24 Sci Total Environ. 2018 Sep 1; 635:699-704. doi: 10.1016/j.scitotenv.2018.04.174. Epub 2018 Apr 24" |
