عنوان مقاله [English]
Water crisis due to high demand of water in agricultural sector is becoming more evident on day by day basis, hence the use of unconventional water resources, especially drained agricultural water is gaining importance. In this investigation the efficacy of four types of biological filters namely: wheat straw, rice husk, cotton stalk and wood sawdust for improving the quality of agricultural drainage water with respect to factors like, salinity, acidity, nitrate, calcium, magnesium, sodium, phosphate, sulphate, pH, TDS and TSS was investigated under a pilot scale study. Analysis of variance showed that no statistically significant difference between different treatments in terms of the impact on the parameters studied, except for nitrates. Based on the results of this study, all the drainage water filters were effective in improving the quality of wastewater for agriculture, so any of them can be used to this end, since these types of filters are available in all region of the country. The results showed that in terms of eutrophication of water resources, when wastewater discharged to surface water resources, the sawdust and cotton stalk filters, the removed nitrate,was 63.23 and 60.12 percent and the removed phosphate was 20 and 20.7 percent respectively and were superior to other filters. Based on the qualitative analysis of wastewater output of the studied biofilters, and comparing it with standards pertaining to maximum allowable limit for application in agricultural fields, it can be concluded that about 260 million Square meters of drainage water available from irrigation network in Moghan.irrigation network is suitable for production of wheat, barley and cotton under different planting patterns in the region.
Abedi-Copaei, J. and Mosavi, S. V. 2003. Comparison of active carbon, sawdust, almond shell and hazelnut shell absorbent in removal of nickel from aqueous environment. J. Water Wastewater.
48, 17-24. (in Persian)
Hassanpour, B., Giri, S. K., Pluer, W. T., Steenhuis, T. S. and Geohring, L. D. 2016. Field performance of denitrifying bioreactors in the northeastern United States. 10th International Drainage Symposium Conference. Sep. 6-9. American Society of Agricultural and Biological Engineers. Minneapolis, Minnesota.
Jiang, Y., Pang, H. and Liao, B. 2009. Removal of copper(II) ions from aqueous solution by modified bagasse. J. Hazard. Mater. 164, 1-9.
Mohammadi-Gallehzan, M. and Shamohammadi, Sh. 2013. Comparison of active carbon, awdust, almond shell and hazelnut shell absorbent in removal of nickel from aqueous environment. J. Water Wastewater 3, 71-79. (in Persian)
Robertson W. D. and Merkley, L. C. 2009. In-stream bioreactor for agricultural nitrate treatment. J. Environ. Qual. 38, 230-237.
Saedi, M., Jamshedi, A., Abbasi, E. and Baiat, J. 2008. Removal of dissolved cadmium by adsorption onto walnut and almond shell charcoal: comparison with Granular Activated Carbon (GAC). J. Water Wastewater. 2, 16-22. (in Persian)
Sangi, M., Shahmoradi, A., Zolgharnein, J., Azimi, G. and Ghorbandoost, M. 2008. Rimoval and recovery of heavy metals from aqueous solution using Ulmas carpinifolia and Fraxinus excelsiortree leaves. J. Hazard. Mater. 155, 513-522.
Seyedin-Boroujeni, S. S. and Mohammadi.Sh. 2015. Removal of chromium (VI) from aqueous solution by the modified Tamarix sawdust: batch and column studies. Iranian Water Res. J. 9(4):79-87. (in Persian)
Shamohammdi, Sh. 2002. Removal of cadmium from aqueous solution using rice husk. J. Water Wastewater. 2, 127-133. (in Persian)
Xing X., Gao B., Zhong Q.Q., Yue Q. and Li Q. 2011. Sorption of nitrate onto amine-crosslinked wheat straw: Characteristics, column sorption and desorption properties. Journal of Hazardous Materials 186:206-211.
Tsui, L. S., Roy, W. R. and Cole, M. A. 2002. Removal of dissolved textile dyes from wastewater by compost sorbent. Color Technol. 119, 14-18.
Zoski, E. D., Lapen D. R., Gottschall N., Murrell R. S. and Schuba, B . 2013. Nitrogen, phosphorus, and bacteria removal in laboratory-scale woodchip bioreactors amended with drinking water treatment residuals. T. Am. Soc. Agr. Biol. Eng. 56, 1339-1347.
Yargholi, B. and Akhavan, K. 2015. Quantity and quality assessment of drainage water and the feasibility of its use in agriculture (case study of Moghan irrigation and drainage network). Research Report.
No. 48715. Iranian Agricultural Engineering Research Institute (AERI). (in Persian)