Quality in papaya fruit produced with treated domestic sewage

Abstract

RESUMO -Objetivou-se, com a realização deste estudo, avaliar a qualidade físico-química e microbiológicas dos frutos do mamoeiro Tainung 1, produzidos mediante proporções de tempo de irrigação com água de abastecimento (AA) e esgoto doméstico tratado em tanque séptico seguido de filtros anaeróbios (AE). O delineamento experimental utilizado foi o de blocos casualizados com quatro tratamentos e seis repetições. Os tratamentos foram compostos por T1 (100% de AA mais adubação recomendada), T2 (67% de AA mais 33% AE), T3 (33% AA mais 67% AE) e T4 (100% de AE). A qualidade físico-química e microbiológica dos frutos foi avaliada por meio dos seguintes parâmetros: espessura da polpa (EP), firmeza da polpa (FP), teor de sólidos solúveis totais (SS), pH, acidez titulável (AT), relação SS/AT e nível populacional de Salmonella ssp. e coliforme totais. Observou-se que as proporções de tempo de irrigação com AA e AE aplicadas não proporcionaram alterações, significativas, nas características físico-químicas dos frutos do mamoeiro, indicando que os valores encontrados atendem aos padrões exigidos para a comercialização e consumo in natura. A qualidade microbiológica dos frutos do mamoeiro produzidos com AE é aceitável para consumo humano, uma vez que, foi constatada a ausência de Salmonella ssp. e de coliformes totais. Palavras-chave:Carica papaya L.. Irrigação. Reuso.ABSTRACT -When carrying out this study, the aim was to evaluate physicochemical and microbiological quality in fruit of the papaya Tainung 1, produced under different irrigation time ratios with water from the supply (AA) and from domestic sewage which had been treated first in a septic tank and then with anaerobic filters (AE). The experimental design was of randomised blocks, with four treatments and six replications. The treatments consisted of T1 (100% AA plus a recommended fertiliser), T2 (67% AA plus 33% AE), T3 (33% AA plus 67% AE) and T4 (100% EA). The physicochemical and microbiological quality of the fruit was evaluated using the following parameters: pulp thickness (EP), pulp firmness (PF), total soluble solids (SS), pH, titratable acidity (TA), SS to AT ratio and the population levels of Salmonella ssp. and total coliforms. It was found that the applied irrigation time ratios with AA and AE resulted in no significant changes to the physicochemical characteristics of the papaya fruit, showing that the values obtained meet the standards required for marketing and in natura consumption. The microbiological quality of papaya fruit produced with AE is acceptable for human consumption, as there was an absence of Salmonella sp. and total coliforms.

Soil chemical parameters and microbiological quality of biquinho pepper irrigated with treated wastewater in protected environment

“…These results were similar to those reported by Gomes Filho et al (2020a) and Gomes Filho et al 2020bwhen they analyzed lettuce and beans irrigated with treated wastewater. As well as the ones found by Batista et al (2017), who evaluated the microbiological quality of papaya fruit produced with treated wastewater. Libutti et al (2018) reported that the fecal coliforms populations in tomato and broccoli were not influenced by the types of water used for irrigation.…”

Análise microbiológica do feijão caupi submetido a diferentes níveis de reposição hídrica com efluente doméstico tratado

“…De acordo com os resultados obtidos por Batista et al (2017), frutos do mamoeiro produzidos no experimento não apresentaram nenhuma contaminação por coliformes totais, bem como ausência de Salmonella sp, não apresentando nenhum risco para consumo in natura.…”

June 2021

“…The drip irrigation system is an important technological alternative for the efficient use of water resources in semiarid environments. It saves water and electricity, increases crop yields and minimizes losses due to evaporation, percolation and runoff, when well designed and managed, (Kilic, 2020) and risks of microbiological contamination of agricultural products (Batista et al, 2017). The susceptibility to the clogging of emitters is a bottleneck that restricts the application and popularization of drip irrigation with wastewater.…”