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 Synthesis of flexible polyurethane foam for applications in planar orthosis using the response surface methodology

2020 ◽  
pp. 1-4
Author(s):  
Jorge Alejandro TORRES-OCHOA ◽  
Nadia Renata OSORNIO-RUBIO ◽  
Orlando CORTAZAR-MARTINEZ ◽  
Victor Alfonso MORALES-NIETO
Keyword(s):  
Response Surface Methodology ◽  
Design Of Experiments ◽  
Response Surface ◽  
Polyurethane Foam ◽  
Reaction Temperature ◽  
Foam Formulation ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane ◽  
Response Variables ◽  
Foaming Time

In this work, the process for the formulation of flexible polyurethane foam is presented following a design of experiments for mixtures. The proportion of polyol, diisocyanate, and crosslinker was considered as factors. The response variables considered were foaming time and reaction temperature. The result of the experiments showed that there is an area where the foam formulation is better. This zone is closed with 5% crosslinker, 50% polyol, and 45% diisocyanate, in this formulation denser foams with more uniform bubbles were obtained

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.

Optimization of Nickel Removal from Electroless Plating Industry Wastewater using Response Surface Methodology

2014 ◽  
Vol 67 (4) ◽  
Author(s):  
Nor Azimah Ahmad ◽  
Mohd Ariffin Abu Hassan ◽  
Zainura Zainon Noor ◽  
Abdullahi Mohammed Evuti ◽  
Jibrin Mohammed Danlami
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Chemical Precipitation ◽  
Precipitation Process ◽  
Jar Test ◽  
Coagulant Dosage ◽  
Nickel Removal ◽  
Optimum Ph

Optimum pH and coagulant dosage for chemical precipitation in wastewater treatment plants is conventionally obtained through repeated jar test. In this research, optimization of the performance of polyacrylamide in the treatment of industrial wastewater was carried out using response surface methodology. The individual linear and quadratic effect of coagulant dosage and pH on the degree of removals of nickel, total suspended solids, Chemical Oxygen Demand and turbidity were investigated. The optimum pH and polyacrylamide dosage were found to be 10.5 and 1.6 ml/L respectively and the optimum percentage nickel removal was 96.9%. The model used in predicting the precipitation process gave a good fit with the experimental variables and hence the suitability of response surface methodology for the optimization of polyacrylamide performance.

scholarly journals Optimization of Oil Removal by Sugarcane Bagasse using Response Surface Methodology

2021 ◽  
Vol 4 (2) ◽  
pp. 82-87
Author(s):  
Asilah Ahmad Samsuir ◽  
Norhisyam Ismail ◽  
Rozidaini Mohd Ghazi
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Oil Pollution ◽  
Oil Removal ◽  
Industrial Growth ◽  
Synthetic Oil ◽  
Exploration And Production ◽  
Oil Wastewater

Oily wastewater is one of the environmental concerns nowadays. The seriousness of oil pollution problem comes in sync with the expansion of oil exploration and production activities, as well as industrial growth around the world. In this study, the ability of sugarcane bagasse in removing oil in synthetic oil wastewater was investigated. Parameters affecting oil removal such as concentrations of synthetic oil wastewater, biosorbent dosage and contact time were optimized using Response Surface Methodology (RSM) via Box Behnken Design. Sugarcane bagasse showed excellent efficiency in removing oil with percentage removal up to 98.73% at 1.3 h contact time with 3.06 g of biosorbent dosage and 16.9% of synthetic oil wastewater concentration. The use of sugarcane bagasse in removing oil in water was successfully prove in this study.

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