Optimization of metal working fluids treatment using Ferric chloride by application of response surface methodology (RSM)
Message:
Abstract:
Introduction
In metal machining processes, the regulation of heat generation and lubrication at the contact point are achieved by application of a fluid referred to as metalworking fluid (MWF). MWFs inevitably become operationally exhausted with age and intensive use, which leads to compromised properties, there by necessitating their safe disposal. Disposal of this waste through Coagulation-flocculation process is an increasingly attractive option. However, successful chemical coagulation depends on optimization of process. In this study, response surface methodology was used to optimization of process.
Methods
The removal efficiencies for chemical oxygen demand (COD), turbidity and amount of oil released obtained using ferric chloride were compared with those was predicted using quadratic models. Central composite design (CCD) and response surface method (RSM) were applied to optimize the operating variables including coagulant dosage and pH. Quadratic models were developed for the three responses (COD, turbidity, oil released from metal working fluid).
Results
The results of this study indicated that the optimum conditions were ferric chloride dosage of 3.16 g/L at pH 3.52. The COD and turbidity removal efficiency and oil released from metal working fluid were 54.4%, 84.8% and 15.9 ml respectively. The experimental data and model predictions were agreed.
Conclusion
Coagulation - Flocculation process using ferric chloride compared with conventional coagulants such as Alum was very effective on pollution indices such as COD and turbidity in treatment of metal working fluid. Response surface methodology and central composite design is a successful method for optimization of coagulation-flocculation using ferric chloride.
Language:
Persian
Published:
Journal of Preventive Medicine, Volume:2 Issue:1, 2015
Pages:
10 - 20
magiran.com/p1461852  
روش‌های دسترسی به متن این مطلب
اشتراک شخصی
در سایت عضو شوید و هزینه اشتراک یک‌ساله سایت به مبلغ 300,000ريال را پرداخت کنید. همزمان با برقراری دوره اشتراک بسته دانلود 100 مطلب نیز برای شما فعال خواهد شد!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی همه کاربران به متن مطالب خریداری نمایند!