Journal
JOURNAL OF ECOLOGICAL ENGINEERING
Volume 19, Issue 5, Pages 240-247Publisher
POLISH SOC ECOLOGICAL ENGINEERING-PTIE
DOI: 10.12911/22998993/89817
Keywords
sewage sludge; ultrasound disintegrator; methane fermentation; biogas
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Funding
- project Research Coordination for a Low-Cost Biomethane Production at Small and Medium Scale Applications (Record Biomap) Horizon 2020 research and innovation programme [691911]
- University of Warmia and Mazury in Olsztyn [18.610.008-300]
- H2020 Societal Challenges Programme [691911] Funding Source: H2020 Societal Challenges Programme
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Ultrasonic disintegration is one of the most interesting technologies among all known and described technologies for sewage sludge pre-treatment before the process of methane fermentation. This study was aimed at determining the effects of an innovative ultrasonic string disintegrator used for sewage sludge pre-treatment on the effectiveness of methane fermentation process. In this experiment, we used a device for disintegration of organic substrates, including sewage sludge, with the use ultrasonic waves. Its technical solution is protected by a patent no. P. 391477 -Device for destruction of tissue and cell structures of organic substrate. The volume of biogas produced ranged from 0.194 +/- 0.089 dm(3)/g o.d.m. at loading of 5.0 g o.d.m./dm(3) and power of 50 W to 0.315 +/- 0.087 dm(3)/g o.d.m. at loading of 4.0 g o.d.m./dm(3) and ultrasounds power of 125 W. The study demonstrated a positive effect of sewage sludge sonication on the percentage content of methane in biogas. Sewage sludge exposure to 125 W ultrasounds increased methane content in biogas to 68.3 +/- 2.5 % at tank loading of 3.0 g o.d.m./dm(3).
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