application of treated wastewater in agriculture and importance of proper management in iran

with the development of the wastewater treatment plants and the increase in volume of treated wastewaters in our country, it is necessary to use treated wastewater wisely. landscape irrigation and agriculture applications considered as a significant scope for the treated wastewater. in this paper, the advantages and disadvantages of these applications are investigated and the importance of the perfect management in the selection of the product type, soil type and irrigation method is explored precisely. furthermore, the obtained results from farm irrigation with treatment wastewater in comparison with conventional irrigation are presented. the results demonstrated that during the growing season (months of mild and hot) the combination of soil and plant as a live filter could be effective to remove suspended solids, bod, nitrogen, phosphorus and potassium that remained in the effluent. in addition, in the cold months, the soil can act as a repository for nutrients saved in the treated wastewater and by starting the hot season, nutrients will be released and thus transferred to plant.