Application of the central composite design and response surface methodology to the advanced treatment of olive oil processing wastewater using Fenton's peroxidation

Ahmadi, Mehdi; Vahabzadeh, Farzaneh; Bonakdarpour, Babak; Mofarrah, E.; Mehranian, M.

doi:10.1016/j.jhazmat.2005.03.042

Cited by 415 publications

(214 citation statements)

References 29 publications

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“…Ongoing research and development seeking to improve methods by minimizing the number of experiments provide information about the direct additive effects of the study variables and interaction effects using design of experiment methods. Recently, this statistical technique has been successfully applied in many fields [22,[32][33][34]. The statistical experiment designs most widely used in optimization experiments are termed response surface designs [22,[32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Agarry¹,

Ogunleye²

2012

JEP

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The objective of this study was designed to evaluate the effects of biostimulation and bioaugmentation amendment agents (NPK fertilizer, Tween 80 and mixed culture) on the bioremediation of tropical soil samples artificially contaminated with Weathered Bonny Light Crude Oil (WBLCO). Response Surface Methodology (RSM) with Box Behnken Design (BBD) was used with three levels and three factors of NPK fertilizer (2 -6 g), Tween 80 (5 -15 mg/l) and mixed culture (0.5 -1.5 g/l) as independent variables and WBLCO removal as dependent variable (response) in a six weeks remediation period. The results showed that the rate of WBLCO removal generally increased with increase in the amount of NPK fertilizer, Tween 80 and mixed culture (biomass), respectively. A statistically significant (P < 0.0001) second-order quadratic regression model for WBLCO removal (using design-expert statistical program (v. 6.0.8)) with a coefficient of determination, R (=0.9996) was obtained. Numerical optimization technique based on desirability function was carried out to optimize the bioremediation process. The optimum values for biostimulation and bioaugmentation amendment agents to achieve a predicted maximum WBLCO removal of 84.88 percent were found to be: NPK fertilizer, 4.25 g; Tween 80, 10.22 mg/l and mixed culture, 0.46 g/l. At this optimum point, the observed WBLCO removal was found to be 83.79 percent. The statistical analyses and the closeness of the experimental results and model predictions show the reliability of the regression model and thus, biostimulation and bioaugmentation of indigenous microbial density and activity can reduce remediation period of petroleum hydrocarbon contaminated environment and subsequently the cost of remediation.

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Section: Introductionmentioning

confidence: 99%

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Agarry¹,

Ogunleye²

2012

JEP

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“…either biological process or advanced oxidation process for treating recalcitrant compound. Whereas the preferred method for treatment of recalcitrant compound is to use advanced oxidation processes (for partial degradation) followed by aerobic biological process [33][34][35][36]. Several investigators have demonstrated that Fenton's reagent is effective for complete color removal and partial degradation of complex organic matter [31,37].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Lodha

2007

Journal of Hazardous Materials

196

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“…The adequate precision value (Table 3) was adopted as a measure of the signal-to-noise ratio; in particular, it compares the range of predicted values at the design points to the average prediction error. Here, this value was found to be 19.99, which indicates an adequate signal, considering that a ratio greater than 4 was desirable [34].…”

Section: Performance Of Sludge Disintegration By the Mw-h 2 O 2 Processmentioning

confidence: 73%

“…Because of the catalase in sludge, H 2 O 2 cannot be used as other oxidant O 3 or Cl 2 to solubilize the sludge directly, and usually used together with Fe as Fenton reaction [34]. In a previous study, catalase activity was suppressed in microwave treatment firstly, then microwave facilitated the hydroxyl radicals (OH·) formation through the decomposition of H 2 O 2 , enhancing both the oxidation and particulate COD disintegration of WAS samples [14].…”

Section: Optimization Of the Mw-h 2 O 2 Process For Organic Matter Rementioning

confidence: 99%

Multivariate analysis of sludge disintegration by microwave–hydrogen peroxide pretreatment process

Wang

Gui

et al. 2015

Journal of Hazardous Materials

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h i g h l i g h t s• Investigation of TSS, H 2 O 2 dosage, pH and interactions on MW sludge pretreatment.• Quadratic models were drawn for 16 response variables with good predictive ability.• Models could optimize the treatment process for multiple disintegration objectives. a r t i c l e i n f o ) has been shown to offer considerable advantages owing to its flexible control, low overall cost, and resulting higher soluble chemical oxygen demand (SCOD); accordingly, the method has been proposed recently as a means of improving sludge disintegration. However, the key factor controlling this sludge pretreatment process, pH, has received insufficient attention to date. To address this, the response surface approach (central composite design) was applied to evaluate the effects of total suspended solids (TSS, 2-20 g/L), pH (4-10), and H 2 O 2 dosage (0-2 w/w) and their interactions on 16 response variables (e.g., SCOD released , pH, H 2 O 2 remaining ). The results demonstrated that all three factors affect sludge disintegration significantly, and no pronounced interactions between response variables were observed during disintegration, except for three variables (TCOD, TSS remaining , and H 2 O 2 remaining ). Quadratic predictive models were constructed for all 16 response variables (R 2 : 0.871-0.991). Taking soluble chemical oxygen demand (SCOD) as an example, the model and coefficients derived above were able to predict the performance of microwave pretreatment (enhanced by H 2 O 2 and pH adjustment) from previously published studies. The predictive models developed were able to optimize the treatment process for multiple disintegration objectives.

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Application of the central composite design and response surface methodology to the advanced treatment of olive oil processing wastewater using Fenton's peroxidation

Cited by 415 publications

References 29 publications

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Factorial Designs Application to Study Enhanced Bioremediation of Soil Artificially Contaminated with Weathered Bonny Light Crude Oil through Biostimulation and Bioaugmentation Strategy

Optimization of Fenton-biological treatment scheme for the treatment of aqueous dye solutions

Multivariate analysis of sludge disintegration by microwave–hydrogen peroxide pretreatment process

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