the effect of zeolite and nitrifying bacteria on remediation of nitrogenous wastewater substances derived fromcarp breeding farm

limitation of water resources and necessity in profitable production, and consequentlyproductivity enhancement has taken crop production by means of unconventional water into consideration. inthis study, the effect of different levels of zeolite and nitrifying bacteria were investigated on nitrogenouscompounds absorption in a closed system of carp breeding with alfalfa. treatments of zeolites at three levels(with a weight percent of 0, 5, and 10%) and bacterial treatments including two levels (without bacteria andwith nitrifying bacteria) were used for six weeks in such way that produced effluent of the carp breeding froman experiment unit were entered to alfalfa culturing medium; so a closed cycle was established. the results ofthis studyshowed that use of zeolite and nitrifying bacteria significantly decreased ammonia values in comparisonto the control in effluent, in addition, nitrate amount in treatments containing zeolite and bacteria weresignificantly (p> 0.05) more than the control treatments. dry weights of alfalfa in the treatments containingzeolite and bacteria were more than the control treatments; additionally, use of bacteria was also significant ondry weight of alfalfa (p> 0.05).this study showed that application of zeolite and nitrifying bacteria to soil,conversion of ammonia to nitrate happens during nitrification that improves water quality of aquaculture andcauses more uptake of nitrate by plant that reduces water and soil pollution by this element.