首页|A novel strategy for integration of oxidation within advanced thermal hydrolysis of sludge

A novel strategy for integration of oxidation within advanced thermal hydrolysis of sludge

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Due to its environmental impact, the growing production of sewage sludge is a prime concern for wastewatertreatment plants. In this study, advanced thermal hydrolysis, the combination of thermal hydrolysis and oxygen,was examined to enhance biogas production and overcome the disadvantages of thermal hydrolysis, includingsludge colour, high energy consumption, and high level of ammonia concentration in the treated sludge. Amixture of 55 % primary sludge and 45 % waste activated sludge was pre-treated using advanced thermal hydrolysisat 100, 115, 130, and 145 ℃ with a processing time varied from 5 to 30 min and oxygen pressure from10 to 30 bar before anaerobic digestion. Advanced thermal hydrolysis process at 145 ℃ 15 min 20 bar O₂ is thecondition that provided the highest biogas yield (439.6 mL/g VS added). At this treatment condition, the concentrationof ammonia nitrogen and propionic acid in the treated sludge was sufficiently low (approximately302 mg/L and 559.7 mg/L, respectively) to minimise adverse effects on anaerobic digestion.

Advanced thermal hydrolysisAnaerobic digestionHydrothermal processingSludge pre-treatmentWastewater

Phuong Linh Ngo、Brent R. Young、Saeid Baroutian

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Department of Chemical and Materials Engineering, The University of Auckland, Auckland, 1010, New Zealand,Department of Environmental Engineering, The Institute of Biotechnology and Environment, Nha Trang University, Viet Nam

Department of Chemical and Materials Engineering, The University of Auckland, Auckland, 1010, New Zealand,Circular Innovations (CIRCUIT) Research Centre, The University of Auckland, Auckland, 1010, New Zealand

Department of Chemical and Materials Engineering, The University of Auckland, Auckland, 1010, New Zealand,Circular Innovations (CIRCUIT) Research Centre, The University of Auckland, Auckland, 1010, New Zealand,Nga Ara Whetu Centre for Climate, Biodiversity and Society, The University of Auckland, Auckland, 1010, New Zealand

2024

10.1016/j.chemosphere.2023.140676

Chemosphere

Chemosphere

ISSN：0045-6535
年,卷(期)：2024.348(Jan.)
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