Release Time:2019-03-13  Hits:

Indexed by: Journal Article

Date of Publication: 2016-10-01

Journal: WASTE MANAGEMENT

Included Journals: Scopus、PubMed、EI、SCIE

Volume: 56

Page Number: 411-422

ISSN: 0956-053X

Key Words: Co-biodrying; Food waste; Dewatered sludge; Air-flow rate; Initial moisture content

Abstract: In this study, dewatered sludge (DS) and food waste (FW) were co-biodried by balancing substrate's property and microbial aspect. A series of experiments were conducted to explore the effects of mixing ratio, particle size of bulking agent, air-flow rate and initial moisture content (MC). A synergistic enhancement of co-biodrying of FW and DS was observed in terms of a stable temperature profile and long high -temperature duration. The biodrying index (water removal/VS consumption) indicated that the co-biodrying had a high efficiency for water removal with less organics consumption, especially for DS/FW = 2/2. The small size (<3 mm) of bulking agent and initial MC of 62.68% was preferable for the biodrying process by providing adequate free air space and extra carbon source. A moderate airflow rate of 0.04 m3 h(-1) kg(-1) showed the best water carrying capacity. This finding suggests that the co-biodrying strategy could be a promising approach to treating different organic wastes with synergistic enhancement. (C) 2016 Elsevier Ltd. All rights reserved.