Characteristics and disposal options of sludge from a steel mill wastewater treatment plant
Publish Year: 1392
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAEHR-1-2_006
تاریخ نمایه سازی: 1 مرداد 1397
Abstract:
In the present study, sludge from a steel wastewater treatment plant (SWWTP) was analyzed regarding its physicochemical characteristics and metal contents, and disposal options. For these purposes, grab sampling was used to collect 18 slurry and 18 cake sludge samples in 6 mouth (May-October 2012). Mann-Whitney U test, one sample T-test and Wilcoxon signed rank test were applied to analyze the obtained data. Canadian Soil Quality Guidelines (CSQG) and Florida Department of Environmental Protection Soil Cleanup Target Levels (FDEPSCTLs) were used to discuss the disposal fate of the generated sludge. The results showed that the order of the studied metals in the sludge was as: Fe> Al> Ca> Mg> Zn> Na> Pb> Mn> Cu> Cr> Ni> Co> Cd. It was found that due to higher concentration of Cu, Pb, Zn and Fe in the generated sludge, compared with CSQG and FDEPSCTLs, it is not suitable for residential and non-residential applications.
Authors
Mehdi Ahmadi
Environmental Technology Research Center AND Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Fatemeh Bohlool
Department of Environmental Sciences, Islamic Azad University, Ahvaz Science and Research Branch, Ahvaz, Iran
Ali-Akbar Babaei
Environmental Technology Research Center AND Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Pari Teymouri
Kurdistan Environmental Health Research Center AND Department of Environmental Health Engineering School of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran