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Simulating the effects of mesophilic anaerobic and aerobic digestions, lagoon system, and composting on pathogen inactivation
被引:20
|作者:
Pandey, Pramod K.
[1
,2
,3
,4
]
Cao, Wenlong
[1
,3
]
Wang, Yi
[1
,3
]
Vaddella, Venkata
[1
]
Castillo, Alejandro R.
[5
]
Souza, Alex
[6
]
del Rio, Noelia Silva
[6
]
机构:
[1] Univ Calif Davis, Sch Vet Med, Dept Populat Hlth & Reprod, Davis, CA 95616 USA
[2] Univ Calif Cooperat Extens, Div Agr & Nat Resources, Davis, CA 95616 USA
[3] Univ Calif Davis, Dept Biol & Agr Engn, Davis, CA 95616 USA
[4] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA
[5] Univ Calif Cooperat Extens, Merced, CA 95341 USA
[6] Univ Calif Cooperat Extens, Vet Med Teaching & Res Ctr, Tulare, CA 93274 USA
关键词:
Animal waste;
Anaerobic digestion;
Lagoon system;
Composting;
Pathogens;
ESCHERICHIA-COLI STRAINS;
VOLATILE FATTY-ACIDS;
DAIRY MANURE;
SWINE MANURE;
ANTIBIOTIC-RESISTANT;
METHANE PRODUCTION;
MICROORGANISMS;
PERSISTENCE;
SURVIVAL;
LIQUID;
D O I:
10.1016/j.ecoleng.2016.10.047
中图分类号:
Q14 [生态学(生物生态学)];
学科分类号:
071012 ;
0713 ;
摘要:
To improve understanding of pathogen inactivation in flushed dairy manure during anaerobic digestion, lagoon systems, and mesophilic composting, we assessed pathogen inactivation in batch-scale anaerobic digesters, aerobic lagoons, and manure piles. Further, we assessed the impact of air injection in lagoon systems on pathogen inactivation. The inactivation of Salmonella and E. coli was studied for more than 70 days. The change in pH, total solids, total carbon, and total nitrogen during manure treatment was determined. The results showed that the lagoon system with air injection to be more effective in pathogen removal compared to the lagoon system with no air injection, anaerobic digestion, and mesophilic composting. Both types of lagoon systems (with and without air injection) were found to be more effective in eliminating pathogens than anaerobic digester systems. Mesophilic manure pile extended the survival of both Salmonella and E. coli. In the anaerobic system, E. coli was detected beyond 60 days of incubation, while in the aerobic system; it was eliminated in 30-35 days. In anaerobic system, Salmonella reached to non-detectable level in 30-35 days, while in aerobic system it took 4-12 days. In the mesophilic manure pile, however, E. coli survival was extended beyond 78 days. Less than one log reduction was obtained in 78 days of mesophilic composting. Salmonella survival was also extended in mesophilic composting pile. (C) 2016 Elsevier B.V. All rights reserved.
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页码:633 / 641
页数:9
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