Potential application of Alcaligenes faecalis strain No. 4 in mitigating ammonia emissions from dairy wastewater.
Bioresour Technol
; 206: 36-42, 2016 Apr.
Article
en En
| MEDLINE
| ID: mdl-26845217
ABSTRACT
This research examined the potential mitigation of NH3 emissions from dairy manure via an enhanced aerobic bio-treatment with bacterium Alcaligenes faecalis strain No. 4. The studies were conducted in aerated batch reactors using air and pure oxygen. Aeration with air and oxygen removed approximately 40% and 100% total ammoniacal nitrogen (TAN), respectively. Intermittent oxygenation (every 2 or 4 h) reduced oxygen consumption by 95%, while attaining nearly identical TAN removal to continuous aeration. The results revealed that adequate oxygen supply and supplementing dairy wastewater with carbon are essential for this bioprocess. Based on the nitrogen mass balance, only 4% of TAN was released as NH3 gas, while the majority was retained in either the microbial biomass (58%) or converted to nitrogen gas (36%). The mass balance results reveal high potential for environmentally friendly bio-treatment of dairy wastewater using A. faecalis strain No. 4 with respect to NH3 emissions.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Alcaligenes faecalis
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Aguas Residuales
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Amoníaco
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Nitrógeno
Idioma:
En
Año:
2016
Tipo del documento:
Article