The Effect of Bio-Drying Pretreatment on Heating Values of Municipal Solid Waste

Abstract:

Bio-drying process, degrading part of the easily biodegradable organic fraction contained in waste, produces heat that combined with an adequate airflow-rate, allows the fast evaporation of waste moisture content. Three ventilation methods were used to investigate the effect of bio-drying pretreatment on municipal solid waste (MSW) characteristics (including water content, mass, heating value and the gross energy capacity). The results show that the water content of MSW decreased from 61.5% to minimum 23.7% after 18 days bio-drying, whereas its lower heating value (LHV) increased an average of 168% from 5413 kJ/kg. In the three trials, the highest LHV amounted to 15.8 MJ/kg, which achieved the LHV demand of solid recovery fuel (SRF). In bio-drying process, the average water removal rate was 80.6%. Smaller organic matter degradation led to a great decline of the water content; therefore, the decrease of gross energy capacity of MSW is not significant.

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 537-546
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.537
• Online since: August 2014
• Authors: Shu Qing Zhao, Wen Xiong Huang*, Ran Yin, Song Yuan, Dan Dan Huang, Chang Liu
• Keywords: Bio-Drying, Heating Value, Municipal Solid Waste (MSW), Water Content

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