Investigation of ozone and coagulant material’s (aluminum sulfate, ferric chloride, poly aluminum chloride and lime) efficiency in Kerman Kork industry wastewater treatment

Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_EHEM-2-1_001

تاریخ نمایه سازی: 15 شهریور 1395

Abstract:

Background: Entry of untreated wastewater of wool scouring factories has been associated with many environmental hazards because of high rate of pollution. Presently effective treatment methods and reducing the costs of operation and maintenance from treatment units have always been under the attention of this industry owners. The aim of this survey is to present a suitable method for the treatment of wool scouring.Methods: In this study, chemical coagulant is used for wastewater treatment (aluminum sulfate, ferric chloride, poly aluminum chloride and lime). And then these materials with ozone as a strong oxidative in reduction of the amount of Chemical Oxygen Demand (COD) in wastewater effluent has been surveyed.Results: The results of this work showed that only ferric chloride and aluminum sulfate among the above chemical coagulant had a high efficiency in the turbidity removal. Productivity of turbidity removal using ferric chloride with the pH of 4 to 5 was 99%, and turbidity was reduced from 166 Nephelometric Turbidity Units (NTU) to 1.5 NTU, and productivity of turbidity removal using aluminum sulfate within the pH 4.5 to 5 was 99.33% that reduced turbidity from 166 to 1.1 NTU. Results of ozonation with 5 g/hour and the oxygen flow of 2.5 litter per min with the pH assess of 15, 30, 45, 60, 90, 120, and 150 min to wastewater from chemical treatment with ferric chloride showed that the rate of COD was reduced from 24700 mg/L to 2940 mg/L. In ozonation to wastewater of chemical treatment with aluminum sulfate within the above rang of time, the rate of COD was reduced from 22500 mg/l to 4800 mg/l.Conclusion: We can be hopeful that in near future, getting the cheap technology of ozone production in industrial scale, one can use this technology for the propose of removal of pollutants having removal preferable by help of advanced treatment approaches .

Authors

Amir Hussein Javid

Associate Professor of Environmental Engineering, Graduate School of Marine Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran

Mohammad Malakootian

Professor of Environmental Health Engineering Research Center and Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran

Mohsen Mehdipour

PhD Student of Environmental Health in SBMU, Member of Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran