Novel conditioner for efficient dewaterability and modification of oily sludge with high water content

Abstract

The Oily sludge with high water content (OS) was dewatered, modi ed and converted into solid fuel by a novel chemical conditioner . The effect of OSO-101 dosage on the dewaterability of OS was studied, showing that OSO-101 dosage of 15% (wt.) could achieve the best dewaterability e ciency of OS (98.18%). Meanwhile, compared with some conventional conditioners, OSO-101 developed by our team was more effective in improving OS dewaterability e ciency. And OSO-101 may have free radical reaction, polar reaction and redox reaction with petroleum hydrocarbons in OS, thereby polymerizing and forming condensed solid structures. The calori c value change of OS after conditioning, heavy metal content and dioxins content of y ash leached from incinerated product were measured for resource analysis and environmental assessment. Results showed that the resultant OS fuel blocks had extremely low content of heavy metals, dioxins and other toxic and hazardous substances leached from y ash, thereby no secondary treatment and fully meeting environmental protection emission standards.Additionally, OSO-101 had certain economic rationality, and could effectively recover the calori c value contained in OS. This research is expected to provide new insights for e cient dewaterability and modi cation of OS, as well as subsequent resource utilization and harmless treatment, bringing potential environmental and economic bene ts. Highlights(1) OS was dewatered, conditioned and converted into solid fuel by OSO-101.(2) The dewaterability e ciency of OS was 98.18% with the addition of 15 wt.% OSO-101.(3) OSO-101 can increase calori c value of OS and improve feasibility for fuel utilization.