We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Sludge deep dewatering by liquefied dimethyl ether: selection of operating conditions based on response surface methodology.
- Authors
Wang, Mingzhu; Huang, Ying; Zhang, Dong; He, Yuan
- Abstract
Sludge is an inevitable by-product of the sewage treatment process and its high moisture content poses significant challenges for its treatment and disposal. This study focuses on the technology of sludge deep dewatering using liquefied dimethyl ether (DME) and explores the relationship between operating parameters (DME/sludge ratio, extraction time and stirring speed) and the water content of the sludge after deep dewatering. After deep dewatering, the sludge's lower heating value (LHV) was significantly increased. The dehydrated filtrate is highly biodegradable and could be treated together with sewage. Based on the response surface method of central composite design, a second-order regression model of the above three variables and sludge water content as the response was established. Finally, the operating conditions diagram was drawn by target water content (36.96 wt.%) which meets the requirement of self-sustained incineration and model equation. This study provides a valuable perspective on sludge drying and fuelisation.
- Subjects
RESPONSE surfaces (Statistics); SEWAGE purification; METHYL ether; CONDITIONED response; REGRESSION analysis
- Publication
Environmental Technology, 2025, Vol 46, Issue 2, p289
- ISSN
0959-3330
- Publication type
Academic Journal
- DOI
10.1080/09593330.2024.2354123