scholarly journals Evaluation of the coagulation floatation process for industrial mineral oil wastewater treatment using response surface methodology (rsm)

2018 ◽  
Vol 1 (4) ◽  
pp. 491-502 ◽  
Author(s):  
E. Kweinor Tetteh ◽  
S. Rathilal
Keyword(s):  
Response Surface Methodology ◽  
Wastewater Treatment ◽  
Response Surface ◽  
Mineral Oil ◽  
Industrial Mineral ◽  
Oil Wastewater ◽  
Floatation Process

scholarly journals Effects of a polymeric organic coagulant for industrial mineral oil wastewater treatment using response surface methodology (RSM)

Water SA ◽  
2018 ◽  
Vol 44 (2 April) ◽  
Author(s):  
E Kweinor Tetteh ◽  
S Rathilal
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Mineral Oil ◽  
Chemical Oxidation ◽  
Water Soluble ◽  
Oil Droplets ◽  
Flotation Process ◽  
Coagulant Dosage ◽  
Oil Wastewater ◽  
Response Variables

In this study, treatment of a local South African oil refinery effluent using a coagulation flotation process is designed using response surface methodology (RSM). A Box-Behnken design (BBD) implementing the RSM is applied to evaluate the effects and interactions of three operating parameters, viz., pH, coagulant dosage and flotation time, on the treatment of mineral oil wastewater (MOW). Polyacrylamide (Zetag-FS/A50), which is a water-soluble compound, is applied to enhance the adsorption mechanism and intermolecular bridging to minimise the amount of oil droplets. In addition, due to the monomeric nature and the charge density of the Zetag-FS/A50, its efficiency was evaluated to serve as an alternative coagulant for the pretreatment of the MOW. The removal of chemical oxidation demand (COD), soap oil and grease (SOG), total suspended solids (TSS) and turbidity from the MOW were used as the response variables for the coagulation flotation process. This was done with a standard dissolved air flotation jar test. The results show that the actual COD, SOG, TSS and turbidity percentage removal at optimised conditions with a coagulant dosage of 50 mg/L were 82%, 83%,70% and 83% respectively, while the predicted response was 92%, 96%, 73% and 87% for COD, SOG, TSS and turbidity, respectively. The analysis of variance (ANOVA) showed that the proposed models are significant at a 95% confidence level. A quadratic model was generated for response variables COD and SOG, while TSS and turbidity produced a linear model. The models fitted well with the experimental data with correlation coefficients (actual R2) of 0.94 for COD, 0.91 for SOG, 0.81 for TSS, and 0.75 for turbidity. The outcome of the study shows that the RSM has merit to optimise and identify the most important factor to control and the Zetag-FS/A50 coagulant has the potential to adsorb the oil droplets in order to enhance the treatment efficiency of the process.

scholarly journals Treatment of industrial mineral oil wastewater – effects of coagulant type and dosage

2017 ◽  
Vol 12 (1) ◽  
pp. 139-145 ◽  
Author(s):  
E. Kweinor Tetteh ◽  
S. Rathilal ◽  
K. Robinson
Keyword(s):  
Oxygen Demand ◽  
Mineral Oil ◽  
Quality Parameters ◽  
Oil Refinery ◽  
Oil And Grease ◽  
Water And Wastewater Treatment ◽  
Dissolved Air Flotation ◽  
Jar Test ◽  
Industrial Mineral ◽  
Oil Wastewater

The use of coagulants is essential in the diverse disciplines of conventional water and wastewater treatment. This work aimed to select an economic and effective coagulant, to minimize the cost of treatment and the oil droplet content of the water, thus enhancing the efficiency of a local South African oil refinery effluent plant recovering water and oil for reuse by treating the industrial mineral oil wastewater. A standard dissolved air flotation jar test preceded evaluation of four coagulants, viz. aluminum sulfate (Alum), aluminum chloride, ferric sulfate and ferric chloride. Chemical oxygen demand, soap oil and grease, total suspended solids and turbidity were determined as water quality parameters to check coagulant efficiency. Removal of over 70% was achieved for each parameter. The results obtained at pH 5 and coagulant dose of 50 mg/L showed that alum was the best pretreatment coagulant for destabilizing and minimizing oil droplets in water, due to its trivalent cationic nature. It was also economically viable.

ASSESSING THE TRIBOLOGICAL PROPERTIES OF VEGETABLE OIL EMULSIONS AND MACHINING PARAMETER OPTIMIZATION USING RESPONSE SURFACE METHODOLOGY

2021 ◽  
Author(s):  
D. K. KARUPANNASAMY ◽  
M. SAMBATHKUMAR ◽  
R. GUKENDRAN ◽  
K. S. K. SASIKUMAR ◽  
N. BAASKARAN ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Tool Wear ◽  
Response Surface ◽  
Surface Finish ◽  
Castor Oil ◽  
Mineral Oil ◽  
Machining Process ◽  
Neem Oil ◽  
Machining Performance ◽  
Oil Emulsions

Bio-degradable lubricants are the need for industries to promote eco-friendly manufacturing process and protect the workers from health hazards. In this paper, the use of oil–water emulsions from the bio-substitute oils have been formulated and its process parameter on a machining process are optimized using response surface methodology. The emulsions are prepared from the vegetable oils such as castor, mahua, palm and neem oil with polysorbate as emulsifying agent. The friction and wear characteristics are studied with a standard pin on disc tribometer for all the emulsions prepared with the base oils namely castor, mahua and palm oil. From the tribological characterization tests, the castor oil emulsions have shown better performance and stability in comparison to other oils. Hence, castor oil emulsions have been tested for its machining performance studies against a conventional mineral oil emulsion in a turning process. Further, an emulsion based on castor oil and neem oil have been tested for tool wear to utilize the antimicrobial properties of neem oil for reducing the bio fouling effects. The machining performance is indicated based on the surface finish and tool wear. Response surface methodology have been used for optimization of the machining parameters, such as cutting velocity, feed rate and depth of cut to achieve an optimal surface finish for a maximum material removal rate. The results show that the castor oil based emulsion can be used as an excellent alternative for mineral oil emulsions.

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