Effects of sugarcane juice addition on the population dynamics of Escherichia coli and the presence of Shiga-toxigenic E. coli during the anaerobic codigestion of dairy cattle manure

Autor: Paula Maria Pilotto Branco, Aline Fernandes, Max Ternero Cangani, Andressa de Souza-Pollo, Jorge de Lucas Júnior, Luiz Augusto do Amaral
Jazyk: English<br />Portuguese
Rok vydání: 2018
Předmět:
Zdroj: Ciência Rural, Vol 48, Iss 3 (2018)
Druh dokumentu: article
ISSN: 1678-4596
0103-8478
DOI: 10.1590/0103-8478cr20170382
Popis: ABSTRACT: The objective of this study was to evaluate the effects of the addition of sugarcane juice on the population dynamics of Escherichia coli and the presence of Shiga-toxigenic E. coli (STEC) during the anaerobic codigestion of dairy cattle manure. For the overall analyses at the end of a hydraulic retention time of 90 days, ten two-liter batch-type biodigesters were divided into two treatment groups: biodigester containing manure and water (MW) and the biodigester containing manure, water and sugarcane juice (MSC). For monitoring the population dynamics and presence of microorganisms, pH, and volatile acidity, tests were carried out every ten days, on 36 smaller-scale batch biodigesters made of one-liter plastic bottles (18 for each treatment). The reductions in E. coli population over time were significant in the MW (60 days) and MSC (20 days) biodigesters. Inactivation of STEC occurred in a shorter period (40 days in MW and
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