Effects of high-pressure extruding pretreatment on MSW upgrading and hydrolysis enhancement.
High-pressure extruding (HPE) is an efficient technology used to separate municipal solid waste (MSW) into wet (biodegradable) and dry (combustible) fractions. Effects of pressure, 10, 20, 30, and 40MPa on quality upgrading of the MSW and hydrolysis of the wet fraction were examined. TS of the dry fraction increased from 48.5% to 59.4% when the extruding pressure increased from 10 to 40MPa, meanwhile the biochemical methane potential (BMP) of the wet fraction extruded under 40MPa was 674mL CH4/g·VS, 33% higher than that of the organic fraction of the MSW (OFMSW) control. Furthermore, in the initial stage of hydrolysis experiment, the extruded wet fractions had lower pH and higher COD, volatile fatty acids (VFAs) and COD/VFA than those of the OFMSW control. The results confirmed that HPE upgraded the MSW and enhanced hydrolysis of the wet fractions. However, high extruding pressure as 40MPa aggravated the excessive acidification of the wet fractions.
['Xu|Shuang|S|', 'Kong|Xin|X|', 'Liu|Jianguo|J|', 'Zhao|Ke|K|', 'Zhao|Guangqi|G|', 'Bahdolla|Amanjol|A|']
D000641:Ammonia D056804:Biofuels D057919:Biological Oxygen Demand Analysis D005232:Fatty Acids, Volatile D006863:Hydrogen-Ion Concentration D006868:Hydrolysis D011312:Pressure D011506:Proteins D012037:Refuse Disposal D062611:Solid Waste
High-pressure extruding MSW Hydrolysis Biochemical methane potential Biodegradable fractions