Investigating the energy consumption indicators and environmental effect of the trout ponds in Ilam province

This study was conducted with the aim of determining the energy and indicators and environmental effects in the process of fish farming in Ilam province. The suitable climate and the existence of cold-water springs in the mountains of Ilam province have caused the prosperity of fish farming in this province. The required information was obtained through questionnaires and interviews and then the input and output energies and energy indicators energy and environmental indicators were calculated using the life cycle assessment method and using Simapro software. The results showed that the total input energy per one ton of coldwater fish (rainbow trout) was 44618.7MJ. Growth feed trout (GFT) with a share of 38.61 % had the highest energy consumer input in the production of rainbow trout. The amount of energy ratio, energy efficiency, energy intensity, and net energy gain indicators in cold-water fish production was 0.1784, 0.0214 kg/MJ, 44.61 MJ/kg, and -36658.7 MJ/ton, respectively. In coldwater fish farms, the share of direct, indirect, renewable, and nonrenewable energy was 42.16, 57.83, 77.15, and 22.84 %, respectively. After normalization of environmental indicators, it was found that in fish production, marine aquatic ecotoxicity index and then fossil resource depletion, acidification, global warming and eutrophication indices have the highest amount of environmental pollutants. The biggest environmental burdens in fish farms are from the process of producing fry, feed, electricity, oil fuel, copper sulfate.