SURVEY OF DISSOLVED AIR FLOTATION (DAF) SYSTEM EFFICIENCY FOR REDUCE OF POLLUTION OF NAZ VEGETABLE OIL FACTORY'S WASTEWATER IN ISFAHAN

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KERAMATI HASAN; PARVARESH A.A.R.; MOVAHEDIAN ATAR H.

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Journal: Internal Medicine Today Year:2006 | Volume:12 | Issue:3 Page(s): 33-37

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Title

SURVEY OF DISSOLVED AIR FLOTATION (DAF) SYSTEM EFFICIENCY FOR REDUCE OF POLLUTION OF NAZ VEGETABLE OIL FACTORY'S WASTEWATER IN ISFAHAN

Author(s)

KERAMATI HASAN | PARVARESH A.A.R. | MOVAHEDIAN ATAR H. | Issue Writer Certificate

Keywords

DISSOLVED AIR FLOTATIONQ3

POLLUTIONQ3

ISFAHAN NAZ VEGETATE OILQ3

ALUMQ2

CHLORIDE FERRICQ3

Abstract

Background and Aim: Flotation involves separation of solids from the water phase by attaching the solids to fine air bubbles to decrease the density of the particles. Flotation including of tree type 1. Vacuum flotation, 2. Dispersed air flotation and 3.DISSOLVED AIR FLOTATION. In this research used from DISSOLVED AIR FLOTATION. Various industries produce many goods and marchandias and affects our environment. Vegetable oil manufacturing is one of these industries. The main pollutants in the east of this industry are chemical oxygen demand (COD), biochemical oxygen demand (BOD) and Oil. The aim of this assay is to study the reduction of POLLUTION of vegetable oil manufacturing wastewater with "DAF" system.Materials and Methods: At first phase of these examinations, the optimum dosage of the coagulants was determined. The coagulants that used in this study were ALUM and Ferric Chloride. The second phase was flotation. In this series of examinations, oil, COD, total solid, volatile solid, fixed solid and suspended solid measured in raw wastewater and the effluent of the DAF pilot.Results: Optimum value of "Ph" for ALUM and CHLORIDE FERRIC obtained 7.5 and 5.5 respectively. And optimum dosage for these obtained 30 and 32 mg/l respectively in this search. Mean moval for the parameters of oil, COD, total solid, volatile solid, fixed solid and suspended solid obtained 75.85%, 78.27%, 77.32%, 82.47%, 73.52% and 85.53% respectively.Conclusion: During pressure rising from 3 to 4 and 5atm removing rate of COD, total solid, volatile solid, fixed solid parameters reduced but oil and suspended solid have increase. In addition to, following increase of flotation time up to 120s all of the measured parameters have increase in removing rate. Optimum A/S for removal of COD, total solid, volatile solid, fixed solid parameters obtained 0.001 and for oil and suspended solid obtained 0.0015.

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APA: Copy

KERAMATI, HASAN, PARVARESH, A.A.R., & MOVAHEDIAN ATAR, H.. (2006). SURVEY OF DISSOLVED AIR FLOTATION (DAF) SYSTEM EFFICIENCY FOR REDUCE OF POLLUTION OF NAZ VEGETABLE OIL FACTORY'S WASTEWATER IN ISFAHAN. OFOGH-E-DANESH, 12(3), 33-37. SID. https://sid.ir/paper/68832/en

Vancouver: Copy

KERAMATI HASAN, PARVARESH A.A.R., MOVAHEDIAN ATAR H.. SURVEY OF DISSOLVED AIR FLOTATION (DAF) SYSTEM EFFICIENCY FOR REDUCE OF POLLUTION OF NAZ VEGETABLE OIL FACTORY'S WASTEWATER IN ISFAHAN. OFOGH-E-DANESH[Internet]. 2006;12(3):33-37. Available from: https://sid.ir/paper/68832/en

IEEE: Copy

HASAN KERAMATI, A.A.R. PARVARESH, and H. MOVAHEDIAN ATAR, “SURVEY OF DISSOLVED AIR FLOTATION (DAF) SYSTEM EFFICIENCY FOR REDUCE OF POLLUTION OF NAZ VEGETABLE OIL FACTORY'S WASTEWATER IN ISFAHAN,” OFOGH-E-DANESH, vol. 12, no. 3, pp. 33–37, 2006, [Online]. Available: https://sid.ir/paper/68832/en

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