Persistence of Fecal Contamination Indicators and Pathogens in Class B Biosolids Applied to Sugarcane Fields.

Autor: Oliveira FC, de Faria MF, Bertoncini EI, Sato MIZ, Hachich EM, Guerrini IA, Passos JRS, James JN, Harrison RB, Feitoza TG, Chiaradia JJ, Abreu-Junior CH, Firme de Moraes LP
Jazyk: angličtina
Zdroj: Journal of environmental quality [J Environ Qual] 2019 Mar; Vol. 48 (2), pp. 526-530.
DOI: 10.2134/jeq2018.07.0270
Abstrakt: Agricultural recycling of human Class B biosolids in sugarcane ( spp.) crop is a promising alternative to reduce the costs of biosolids disposal. However, the presence of fecal contamination indicators such as thermotolerant coliforms and pathogenic organisms such as enterovirus and spp. in biosolids impose barriers to effective and widespread use of biosolids as fertilizer. In addition, there is a scarcity of studies that investigate the persistence of these organisms in tropical soils. This study aimed to evaluate the persistence of pathogenic and fecal indicators for 258 d in a tropical clayey soil amended with human Class B biosolids and cultivated with sugarcane. Treatments were immediate incorporation of biosolids into soil after application (T1) or superficial application of biosolids followed by incorporation after 35 d (T2), emulating the typical procedure in sugarcane fields. Thermotolerant coliforms were estimated to persist for 437 d in T1 and 398 d in T2. For enterovirus, mean estimated persistence time in soil was 26 d for T1, but the sampling frequency was insufficient in T2 for persistence analysis. After 35 d, no enterovirus was detected in any sample. Mean estimated persistence time for viable spp. eggs in soil was 22 d in T1 and 41 d in T2.
(Copyright © by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc.)
Databáze: MEDLINE
Externí odkaz: