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Decision-making on the most appropriate method of wastewater treatment and recycling is not very easy in Iran because of the different climates, different quality of wastewater and various applications of the treated water. The high investment cost of the wastewater technologies is another drawback; the main evidence for this claim is that only about one percent of villages are equipped with wastewater treatment plants in the county and accordingly it shows the opportunity of the improvement plans in this field. It should be emphasized that there is a close interaction among societies, environment, and the food in the rural area and any water recycling plan requires a comprehensive technical, environmental and economic investigation before any implementation. Because of the complexity of the studies in this filed and on the other hand focusing on the accumulated knowledge in universities they are the most relevant start poles for filling this knowledge and technique gap.