Using Chitosan/CHPATC as coagulant to remove color and turbidity of industrial wastewater: Optimization through RSM design

Momeni, Meysam Mohammad; Kahforoushan, Davood; Abbasi, Farhang; Ghanbarian, Saeid

doi:10.1016/j.jenvman.2018.01.031

Cited by 68 publications

(21 citation statements)

References 22 publications

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“…The RSM, the design of the experimental technology, can be used to establish mathematical models that can evaluate the effects of multiple factors on the expected response . The RSM involves the use of appropriate experimental quantitative data to identify and solve multivariable equations at the same time and is a statistical method that provides the best solution . The RSM has the advantages of being convenient and saving time because it significantly reduces the evaluation of multiple parameters and their interactions, which would require a required number of experiments .…”

Section: Introductionmentioning

confidence: 99%

The optimization of fermentation conditions for Pichia pastoris GS115 producing recombinant xylanase

Sun

Yan

Zhan

et al. 2020

Engineering in Life Sciences

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Xylanase is a member of an important family of enzymes that has been used in many biotechnological processes. However, the overall cost of enzyme production has been the main problem in the industrial application of enzymes. To obtain maximum xylanase production, statistical approaches based on the Plackett-Burman design and response surface methodology were employed. The results of the statistical analyses demonstrated that the optimal conditions for increased xylanase production were the following: inoculum size, 3.8%; maize meal, 4.5%; histidine, 0.6%; methanol, 1%; culture volume, 20%; bean pulp, 30 g L −1 ; and Tween-80, 0.8%; and pH 5.0. Verification of the optimization demonstrated that 3273 U mL −1 xylanase was observed under the optimal conditions in shake flask experiments. SDS-PAGE results showed that the size of xylanase protein was about 23 kDa. The results showed that the xylanase produced by fermentation came from Aspergillus Niger by MALDI-TOF-MS. The optimized medium resulted in 2.1-and 1.4-fold higher the activity of xylanase compared with the unoptimized medium (the main nutrients are maize meal and bean pulp) and laboratory medium (the main nutrients are yeast extract and peptone), respectively.The optimization of fermentation conditions is an effective means to reduce production cost and improve xylanase activity. K E Y W O R D Smethodology optimization, Plackett-Burman, xylanase Abbreviations: PBS, phosphate-buffered saline; RSM, response surface method.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

The optimization of fermentation conditions for Pichia pastoris GS115 producing recombinant xylanase

Sun

Yan

Zhan

et al. 2020

Engineering in Life Sciences

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“…The effect of pH of wastewater and dosage of coagulant dosage and their interactions with the turbidity reduction is illustrated in Figure 1(a) and 1(b) by using the 3D response surface plot and contour plot at pH 2 and dosage of coagulant at 60 mg/L (center point). A change in the coagulant dosage and pH of wastewater are effective factors in the turbidity reduction of wastewater in application of natural coagulant for the treatment [9,23]. The percentage of turbidity reduction increased by enhancing dosage of coagulant up to 60 mg/L at pH 2.…”

Section: Effect Of Parametersmentioning

confidence: 99%

“…It was described that at lower pH values, morphology of the polymeric chains widen whereas the hydrodynamic radius will increase. This is linked to the reduction of electrostatic repulsion force due to the presence of cationic polyelectrolyte molecules that enhance the bridging effect between particles of natural coagulant and colloids [23].…”

Section: Effect Of Parametersmentioning

confidence: 99%

Analysis of Artocarpus Heterophyllus Peel as a Natural Coagulant Using Response Surface Methodology (Rsm)

Mardarveran

Mokhtar

2020

Jurnal Teknologi

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The chemical coagulants used in the process of wastewater treatment causes negative implications on environment and human health. Exploration on natural coagulants as environmental friendly solution has been widely carried out. In present research, Artocarpus heterophyllus (jackfruit) peel is used as coagulant in treating domestic wastewater. This study aimed to assess optimum pH of wastewater and coagulant dosage by varying them to achieve the maximum removal rate of total suspended solid (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD) and turbidity. The studied range for pH of wastewater was pH 1-3 and dosage of coagulant within 50–70 mg/L. Response surface methodology (RSM) based on central composite design (CCD) implied in optimization of this coagulation process. Treatment using this natural coagulant enabled maximum reduction of turbidity, TSS, BOD and COD up to 80.7 %, 77.5 %, 34.3 % and 34.6 % respectively under optimum condition of pH 2.1 and dosage of 58 mg/L. These findings revealed higher reduction in turbidity and TSS. Thus, this study indicates the promising potential of the Artocarpus heterophyllus peel extract as an alternative bio-based coagulating agent for effective pre-treatment of wastewater.

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“…Meanwhile, at a higher concentration with the same dosage, the same fixed number of biosorbent sites competes for more dye molecules, hence saturating it [23]. In addition, the increase of initial concentration would protonate the active sites in ES cell wall, hence reducing the repulsion strength between MB dye molecules and ES biosorbent thus leading to a decrement in the biosorption uptake and removal rate [24].…”

Section: Interactive Effect Of Variablesmentioning

confidence: 99%

“…RSM is a practical method for studying the effect of multiple parameters, determining the significant parameters and analysing the possible interactions that may influence the biosorption process [22], [23]. RSM considerably reduces the number of experimental runs, provide information on the interaction between parameters and determine the optimum operational conditions yielding the highest removal efficiency [24]. In this study, the Central Composite Design (CCD) is employed to determine the optimum process variables.…”

Section: Introductionmentioning

confidence: 99%

Comparative Prediction of Red Alga Biosorbent Performance in Dye Removal using Multivariate Models of Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

Mokhtar¹,

Edriyana²,

Azmi³

et al. 2018

IJET

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Red algae species, Euchema Spinosum (ES) in Malaysia possesses excellent biosorbent properties in removing dyes from aqueous solutions. In the present study, the experimental design for the biosorption process was carried out via response surface methodology (RSM-CCD). A total of 20 runs were carried out to generate a quadratic model and further analysed for optimisation. Prior to the evaluation, the characterisation study of the ES was performed. It was observed that the maximum uptake capacity of 399 mg/g (>95%) is obtained at equilibrium time of 60 min, pH solution of 6.9-7.1, dosage of 0.72 g/L and initial dye concentration of 300 g/L through statistical optimisation (CCD-RSM) based on the desirability function. It is demonstrated in the present study that the ANN model (R2=0.9994, adj-R2=0.9916, MSE=0.19, RMSE=0.4391, MAPE=0.087 and AARE=0.001) is able to provide a slightly better prediction in comparison to the RSM model (R2= 0.9992, adj-R2= 0.9841, MSE=1.95, RMSE=1.395, MAPE=0.08 and AARE=0.001). Moreover, the SEM-EDX analysis indicates the development of a considerable number of pore size ranging between 132 to 175 mm. From the experimental observations, it is evident that the ES can achieve high removal rate (>95%), indeed become a promising eco-friendly biosorptive material for MB dye removal.

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Using Chitosan/CHPATC as coagulant to remove color and turbidity of industrial wastewater: Optimization through RSM design

Cited by 68 publications

References 22 publications

The optimization of fermentation conditions for Pichia pastoris GS115 producing recombinant xylanase

The optimization of fermentation conditions for Pichia pastoris GS115 producing recombinant xylanase

Analysis of Artocarpus Heterophyllus Peel as a Natural Coagulant Using Response Surface Methodology (Rsm)

Comparative Prediction of Red Alga Biosorbent Performance in Dye Removal using Multivariate Models of Response Surface Methodology (RSM) and Artificial Neural Network (ANN)

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