PERFORMANCE EVALUATION BIOLOGICAL FILTERS FOR TREATMENT OF AGRICULTURAL DRAIN WATERKaramat Akhavan Giglou, Ali Shahnazari and Bahman Yargholi
The use of agricultural drainages due to a considerable amount, limited quantity in comparison with the urban and industrial wastewater, as well as close to the consumer (farm), as one of the options considered non-conventional water resources is important. In this regard, this study was designed to investigate the possibility of treating wastewater by biofilters to determine the efficiency of four types of biological filter including wheat straw, rice husk, cotton stalk and wood sawdust, improve the quality of agricultural land drainage water containing factors, nitrate, calcium, magnesium, sodium, phosphate, sulphate, salinity, pH, TDS and TSS was tested in a pilot farm. Analysis of variance showed a biological filter between the different treatments in terms of the impact on the parameters studied, there was no statistically significant difference except for nitrates. While cotton stalks and sawdust compare the performance of the site showed filters in the process of absorbing higher than the biofilter other functions. Key words: Biological filters, Cotton stalk, Drainage water, Sawdust, Rice husk, Wheat straw
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