Below and above boiling point comparison of microwave irradiation and conductive heating for municipal sludge digestion under identical heating/cooling profiles.

Abstract:

:This research provides a comprehensive comparison between microwave (MW) and conductive heating (CH) sludge pretreatments under identical heating/cooling profiles at below and above boiling point temperatures. Previous comparison studies were constrained to an uncontrolled or a single heating rate due to lack of a CH equipment simulating MW under identical thermal profiles. In this research, a novel custom-built pressure-sealed vessel which could simulate MW pretreatment under identical heating/cooling profiles was used for CH pretreatment. No statistically significant difference was proven between MW and CH pretreatments in terms of sludge solubilization, anaerobic biogas yield and organics biodegradation rate (p-value>0.05), while statistically significant effects of temperature and heating rate were observed (p-value<0.05). These results explain the contradictory results of previous studies in which only the final temperature (not heating/cooling rates) was controlled.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Hosseini Koupaie E,Eskicioglu C

doi

10.1016/j.biortech.2015.03.113

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

235-245

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(15)00445-9

journal_volume

187

pub_type

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