TY - JOUR
T1 - Microwave and thermal pretreatment as methods for increasing the biogas potential of secondary sludge from municipal wastewater treatment plants
AU - Kuglarz, Mariusz
AU - Karakashev, Dimitar Borisov
AU - Angelidaki, Irini
PY - 2013
Y1 - 2013
N2 - In the present study, the sludge was pretreated with microwave irradiation and low-temperature thermal method, both conducted under the same temperature range (30–100°C). Microwave pretreatment was found to be superior over the thermal treatment with respect to sludge solubilization and biogas production. Taking into account the specific energy demand of solubilization, the sludge pre-treated at 60–70°C by microwaves of 900W was chosen for further experiments in continuous mode, which was more energetically sustainable compared to lower value (700W) and thermal treatment. Continuous biogas reactor experiments indicated that pre-treated sludge (microwave irradiation: 900W, temperature: 60–70°C) gave 35% more methane, compared to untreated sludge. Moreover, the results of this study clearly demonstrated that microwave pretreated sludge showed better degree of sanitation.
AB - In the present study, the sludge was pretreated with microwave irradiation and low-temperature thermal method, both conducted under the same temperature range (30–100°C). Microwave pretreatment was found to be superior over the thermal treatment with respect to sludge solubilization and biogas production. Taking into account the specific energy demand of solubilization, the sludge pre-treated at 60–70°C by microwaves of 900W was chosen for further experiments in continuous mode, which was more energetically sustainable compared to lower value (700W) and thermal treatment. Continuous biogas reactor experiments indicated that pre-treated sludge (microwave irradiation: 900W, temperature: 60–70°C) gave 35% more methane, compared to untreated sludge. Moreover, the results of this study clearly demonstrated that microwave pretreated sludge showed better degree of sanitation.
KW - Microwave irradiation
KW - Pre-treatment
KW - Anaerobic digestion
KW - Sanitation
KW - Secondary sludge
U2 - 10.1016/j.biortech.2013.02.001
DO - 10.1016/j.biortech.2013.02.001
M3 - Journal article
C2 - 23500587
SN - 0960-8524
VL - 134
SP - 290
EP - 297
JO - Bioresource Technology
JF - Bioresource Technology
ER -