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Leitlinien Unfallchirurgie
5. Auflage bestellen |
Table of Contents, Datei (34 KB)
Extract, Datei (71 KB)
This work deals with the evaluation of the performance of a multiple-stage anaerobic digestion process with respect to the degradation of organic matter and the inactivation of pathogenic and indicator organisms in liquid dairy cattle manure. Investigations were performed at bench- and full-scale.
During the three-stage mesophilic-thermophilic-mesophilic anaerobic treatment of liquid manure from cattle receiving a high-fiber diet, a comparably high methane yield of 0.24 m3 per kg of volatile solids was achieved. Given a minimum guaranteed retention time of 4 h at 55°C, the level of fecal coliforms in liquid manure was reduced to below 10 MPN per g fresh matter. The concentration of infectious oocysts of Cryptosporidium parvum was reduced by more than 5 log-units. Increasing the feeding interval from 1 to 4 h had no significant influence on the performance of the system. When the temperature in the first treatment stage was decreased from 38 to 20-25°C, the process stability in the thermophilic reactor was significantly improved while overall the methane yield and the reduction of indicator organisms remained essentially unchanged.
Based on these findings, two-stage thermophilic-mesophilic anaerobic digestion can be approved as a treatment technology for liquid manure to minimize the input of pathogenic and indicator organisms from livestock farming into the environment.
ISBN-13 (Printausgabe) | 3867276528 |
ISBN-13 (Hard Copy) | 9783867276528 |
ISBN-13 (eBook) | 9783736926523 |
Language | English |
Page Number | 144 |
Lamination of Cover | glossy |
Edition | 1 |
Volume | 0 |
Publication Place | Göttingen |
Place of Dissertation | München |
Publication Date | 2008-07-25 |
General Categorization | Dissertation |
Departments |
Agricultural science
|
Keywords | Anaerobic digestion; biogas; liquid manure; dairy cattle; pathogens; indicator organisms; mesophilic; thermophilic; cryptosporidia |