عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Aquaculture is one of the pioneers of healthy food production for humanity. According to the World Food and agriculture Organization (FAO), Aquaculture is the only source that has the most motivation for job creation and poverty eradication, among more than 70 breeding systems for human beings supplying living creatures, aquaculture is the only source. Among the problems of this ammonia wastewater industry is the aquaculture activities that result in the eutrophication of the water they receive, even at low concentrations of ammonia, may also have adverse effects on the tissues and physiological characteristics of rainbow trout. In this study, using coal, a coral shell and an steel wool that is covered with algae-bacterial biofilms and provides a suitable bed for physical and biological removal. The initial concentration of ammonia in the bioreactor was 6 mg / L and each of the media was tested separately. The rate of ammonia reduction in lignite, coral shell and steel wool has been 91.5%, 82.1%, and 78.8% during the 72-hour test period, respectively. The efficiency of ammonia removal in the bioreactor was based on the complement that the interactions of media with biofilm in the direction of physical, chemical and biodegradation, which yielded optimum efficiency compared to similar systems at a shorter time.