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Indexed by:期刊论文

Date of Publication:2016-10-01

Journal:WASTE MANAGEMENT

Included Journals:SCIE、EI、PubMed、Scopus

Volume:56

Page Number:411-422

ISSN No.: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.