the wastewater quality of the combined cycle power plant of montazer ghaem for re-using in agriculture

While the source of irrigation water is wastewater, there are some concerns about the pollution of crop products and the farm workers’ contact with pathogens and environmental tensions in the farm's field. the purpose of this applied research was to investigate the quality of the wastewater of the combined cycle plant of montazer ghaem to be reused in agriculture. in this study, the characteristics of inlet wastewater and outlet effluent from the urban wastewater treatment plant of montazer ghaem-kearj were investigated based on the statistics of the operation and sampling period. moreover, the effects of the medium–term usage on the physical and chemical properties of the soil and several plants affected by this water were studied. for this purpose, three samples from the inlet wastewater and three samples of outlet effluents of the treatment plants were provided and eleven sewage quality parameters were tested. however, three soil samples from 0 to 30 cm depths of adjacent lands under irrigation with wastewater as well as a control sample were prepared and their physical and chemical properties were determined. the analysis of the changes in the physicochemical parameters revealed that, except for the ph which was approximately constant, all parameters including ec, tds, cod, bod, turbidity, fat, oil, heavy metals (fe, ni, cr, cd, cu, v) in the inlet wastewater were reduced after refining and leaving the treatment plant. however, the amount of some parameters was higher than standard which indicates the improper performance of the refineries in the removal of physico-chemical contaminants. this study concluded that the wastewater treatment plant of montazer-ghaem failed to significantly eliminate the elements such as ni (average input 13.5- average output 12.5) and cd (av input 0.16- av output 0.1), but had the highest refinement in terms of the elements including cu (av input 36.8- av output 8.8), v (av input 284.9- av output 84.5), fe (av input 5.6- av output 1.6), and cr (av input 71.5- av output 28.6) respectively.