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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 14, No. 3, 2011
Bioline Code: ej11025
Full paper language: English
Document type: Review Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 14, No. 3, 2011

 en Effect of free ammonia nitrogen on the methanogenic activity of swine wastewater
Belmonte, Marisol; Hsieh, Chia-Fang; Figueroa, Cindy; Campos, José Luis & Vidal, Gladys

Abstract

Swine wastewater is characterized by high organic matter content, solids, nitrogen (expressed as total ammonia and protein) and heavy metals. This work determines the methanogenic toxicity effect of free ammonia contained in swine wastewater comparing raw swine wastewater (RW) and the liquid fraction of swine wastewater (TW). The values of IC50 (50% of inhibition) obtained for methanogenic bacteria ranged between 56 and 84% for RW, meanwhile IC50 for TW was ranged between 84 and 94%. Such inhibitory effects can be related to the free ammonia nitrogen concentration (> 40 mg NH3-N/L) contained in swine wastewater.

Keywords
free ammonia nitrogen, methanogenic activity, swine wastewater

 
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