<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The previously received results of individual processes of hydrodynamic and alkaline disintegration were decisive significant for the conducted research task. The combination of hydrodynamic cavitation (30 minutes duration of the process) and alkaline (pH ≈ 9) to the destruction of activated sludge caused a significant release of organic matter about 1383 mg/dm<sup>3</sup> in comparing to individual processes. Such increase in the SCOD value resulted in a significant growth the efficiency of biogas yield in a two-stage mesophilic-thermophilic processes. The increase in yield was from 26 to 38% depending on the volume of disintegrated sludge. The effect of the two-stage fermentation resulted activated sludge hygienisation. The microbiological analysis of the influence of the fermentation with the different volume of hybrid disintegrated sludge was based on microbiological indicators: Salmonella spp. and coliphages. The obtained results prove the effectiveness of the two-stage digestion process compared to single mesophilic fermentation which not always completely eliminates the above indicators.</p></abstract>

The previously received results of individual processes of hydrodynamic and alkaline disintegration were decisive significant for the conducted research task. The combination of hydrodynamic cavitation (30 minutes duration of the process) and alkaline (pH ≈ 9) to the destruction of activated sludge caused a significant release of organic matter about 1383 mg/dm3 in comparing to individual processes. Such increase in the SCOD value resulted in a significant growth the efficiency of biogas yield in a two-stage mesophilic-thermophilic processes. The increase in yield was from 26 to 38% depending on the volume of disintegrated sludge. The effect of the two-stage fermentation resulted activated sludge hygienisation. The microbiological analysis of the influence of the fermentation with the different volume of hybrid disintegrated sludge was based on microbiological indicators: Salmonella spp. and coliphages. The obtained results prove the effectiveness of the two-stage digestion process compared to single mesophilic fermentation which not always completely eliminates the above indicators.

Mesophilic-thermophilic fermentation process of waste activated sludge after hybrid disintegration

Department of Environmental Microbiology and Biotechnology, Institute of Environmental Protection and Engineering, University of Bielsko-Biala, ul. Willowa 2, 43-309 Bielsko-Biała, Poland, phone +48 33 827 91 57

Institute for Nanomaterials, Advanced Technology and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec 1, Czech Republic, phone +420 485 353 006

Ecological Chemistry and Engineering S

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

The previously received results of individual processes of hydrodynamic and alkaline disintegration were decisive significant for the conducted research task....

Mesophilic-thermophilic fermentation process of waste activated sludge after hybrid disintegration

Published Online: Apr 09, 2014

Page range: 125 - 136

DOI: https://doi.org/10.2478/eces-2014-0011

Keywords
hybrid disintegration, two stage fermentation, biogas, higienisation of sewage sludge

© by Klaudiusz Grűbel

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Mesophilic-thermophilic fermentation process of waste activated sludge after hybrid disintegration

Published Online: Apr 09, 2014

Page range: 125 - 136

DOI: https://doi.org/10.2478/eces-2014-0011

Keywordshybrid disintegration, two stage fermentation, biogas, higienisation of sewage sludge

© by Klaudiusz Grűbel

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords
hybrid disintegration, two stage fermentation, biogas, higienisation of sewage sludge