CABRAL, A. A.; http://lattes.cnpq.br/8608812318524770; CABRAL, Ademar de Assis.
Résumé:
The purpose of this experimental research was to investigate health, environmental and
production of sesame (Sesamum indicum L.) cv aspects. BRS - G4, irrigated with treated
wastewater, observing microbiological concentration of seeds in comparison with the standard
Coliforms at 45 ° C, without causing harm to human and animal health. The experiment was
conducted in a greenhouse located at the Center for Technology and Natural Resources, the
Federal University of Campina Grande - UFCG, Campus de Campina Grande - PB. The
experimental design was randomized blocks of type, in a 3x3 factorial design with four
replications, totaling 36 experimental plots of factorial design with two factors: two
wastewater treated by UASB Wetland and post-treated with wetland systems, and water
supply as witness. The other factor, were three types of localized irrigation, surface drip,
subsurface drip and spray. In the second soil analysis performed immediately after harvesting
of sesame, after five months of use of irrigation with treated wastewater, showed changes in
their physicochemical properties, evolving into a saline soil, C3 medium salinity, with the
same RAS 4.23 and the percent saturation of 27%. The pH of from 6.6 to 6.8. Microbiological
analysis of soil, soil samples collected after harvest of sesame was detected concentration (6.6
x 105UFC / 100mL Coliforms at 45 ° C), while in the native soil, the concentration was
(0,405x103UFC / 100 mL coliforms at 45 ° C), assigning these relative levels of CFU /
100mL in the soil, with the use of wastewater, which showed concentrations (≤ 1 069 MPN /
100 ml coliforms at 45.) and a removal rate of 58 bacteria 31%. However, in comparison with
that soil water treated by the UASB post-treated wetland system, it was found that the bacteria
removal rate was 54.00% and showed an average concentrations (≤ 989 MPN / ml Coliforms
at 100 45 ° C) for water samples analyzed at 90 DAP, thus confirming, in accordance with the
standards recommended by the current legislation, the concentration (≤ 1000NMP / 100 ml
Coliforms at 45 ° C). The microbiological results of the grains of sesame, the analysis in the
laboratory, for plots that received water from the wetland system, revealed a concentration (>
102NMP / g Coliforms a45ºC) above the adopted standard. Although the microbiological
analysis, confirm the presence of Coliforms at 45 ° C and E. coli, for the treatments (T1, T4,
T7), with the lower recommended standard for plant foods, (≤100NMP / g) values, measured
by safety, it is considered Coliform bacteria. And the microbiological results of grain sesame,
produced with the water supply, the laboratory analysis showed similar results to the results
of UASB. The treatments (T3 = 1,4nmp / g T6 = 1,1nmp / T9 = 0,36nmp g / g) for the
samples, are in accordance with standard and are suitable, it should be recommended for use
in food and of warm-blooded animals. The efficiency of the irrigation system, shows a degree
of acceptability for regular drip irrigation systems, where each system individually analyzed
for subsurface drip, surface drip and micro sprinkler with uniformity coefficient distribution
(cud) of 80%, 77% and 73% respectively, compared to flow transmitters; however, showed a
high degree of acceptability bad when the three systems were combined to give a percentage
of 67% (cud). The flow rate of the emitters used in the experiment was not affected by the
type of water used.
