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Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2011 by Universidad Católica de Valparaíso -- Chile
Vol. 14 No. 3, Issue of May 15, 2011

Fig. 1 Methane production in the methanogenic toxicity assays of piggery wastewater (1) first feeding and (2) second feeding. Assays corresponding: A) serie A; B) serie B; C) serie C; and D) serie D.