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IRJET- Multienzymatic Clarification of Totapuri Mango Pulp with the Help of Response Surface Methodology
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IRJET- Multienzymatic Clarification of Totapuri Mango Pulp with the Help of Response Surface Methodology
1.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1741 Multienzymatic Clarification Of Totapuri Mango Pulp With The Help Of Response Surface Methodology Gaurav M. Kunkulol1, Kalyan P. Babar2, Balaji Hakke3, Shrikant S. Bhamare4 1 Research Scholar, Department of Agricultural Engineering, Maharashtra Institute of Technology, Aurangabad, Maharashtra, India 2 Assistant Professor, Department of Agricultural Engineering, Maharashtra Institute of Technology, Aurangabad, Maharashtra, India 3 Head Production, NPD at Jain Farm Fresh Foods Ltd, Jain Valley, Shrisoli Road, Jalgaon, Maharashtra India 4 Manager Quality and R & D, Jain Farm Fresh Foods Ltd, Jain Valley, Shrisoli Road, Jalgaon Maharashtra, India -------------------------------------------------------------------------------------------------***------------------------------------------------------------------------------------------------ Abstract - Response surface methodology is a statistical method frequently used for optimization studies. Mango juice is viscous and cloudy in nature and contents pectin, starch and xylan. The effect of amylase concentration, pectinase concentration, incubation temperature and incubation time on the juice yield, clarity and colour (L value) of totapuri mango pulp were studied. Totapuri mango juice treated with amylase concentration (0.05- 0.45%), pectinase concentration (0.1-0.5%), incubation temperature (40-600C) and incubation time (60-180min). The experimental run for the treatment was designed according to Design expert (10.0) software and the parameters optimized using Response surface methodology. Significant regression models describing the changes of yield, clarity and colour (L value) with respect to the independent variable were established, with R2 (coefficient of determination) greater than 0.8. Statistical checks (R2, F value, C. V. and lack to fit test) indicating that the model was adequate for representing the experimental data. From the RSM analysis the optimum processing conditions were found as: 0.15% amylase concentration, 0.20% pectinase concentration, 550C incubation temperature for 150 min time. The recovery (yield), clarity and Colour (L value) of the totapuri mango juice under optimized conditions were 84.24 %, 84.74%T and 54.01 respectively. Key Words: Totapuri Mango pulp, Amylase, Pectinase, Response Surface Methodology, Yield, Clarity and Colour (L Value). 1.INTRODUCTION Mango (Magnifera Indica Linn) fruit belongs to the family Anacardiaceae is one of the most important commercial fruit crops in India [07]. Mango is indigenous to India; it is cultivated in many tropical and subtropical regions [32]. Mango is king of tropicanol fruits and is well known for its taste, succulence and exotic flavour. Mango is perishable, seasonal fruit which is rich in pectin, sucrose, glucose, maltose, vitamin A, B and C and minerals [06, 30]. Mango also provides a certain amount of minerals and vitamins such as calcium, phosphorous, iron and riboflavin [20]. Mango contains phenols which have powerful antioxidant [36]. Totapuri (Bangalora) mango processed on large scale because this variety has a large yield of pulpy juice with exotic flavour [39]. Mango pulp shows a high ratio of dissolved solid to insoluble fibre, which is responsible for its high viscosity as well as richness in dietary fibre. This fibre consists of pectins, celluloses and starch in addition to free sugars [39]. Mango fruit pulp, 33-85% of the fresh fruit, is essentially composed of protein (0.36-.40 gm), carbohydrate (16.20-17.18 gm), carotene (0.135-1.872 mg), polyphenols, pectin, minerals and other vitamins. Water content of mango pulp more than 80% [25]. Mango pulp is extracted during its seasons and is stored for production of various products [30]. Mango is highly perishable fruit therefore most of fruit processing industry preserves mango pulp for the manufacture of mango pulp product around the year [04]. Juice extraction can be done by using various mechanical processes but in mechanical process yield of juice is low as compare to enzymatic treatment of juice. Mechanical process may be achieved through diffusion, extraction, centrifuge, screw type extractor, decanter, fruit-pulper and by different types of presses [34]. With help mechanical crushing of the pectin rich fruits results in a highly viscous fruit juice from which it is difficult to extract clear juice directly by pressing , due to the fact that mechanical crushing of the tissues give juice that remains bound to the pulp to from a jellified mass [21]. Clarification is a process by which the semistable emulsion of colloidal plant carbohydrates that support the insoluble cloud material of a freshly pressed juice is “broken” [34, 35] such that the viscosity is dropped and the opacity of the cloudy juice is changed to an open splotchy look. This can be accomplished in one of two general ways: enzymatic and non-enzymatically [35]. Presently various methods are used for juice clarification such as enzymatic clarification, centrifugation, ultrafiltration, each filtration and cross flow membrane filtration. Now days enzymatic clarification commonly
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1742 used in fruit processing industries [35]. In enzymatic clarification process various types of enzyme are used such as pectinase, cellulose, amylase, xylanase etc. [21, 26]. Enzymes are responsible for the degradation of the long and complex molecules in the fruit pulp called as pectin which responsible for turbidity in pulp [42]. Enzymatic degradation of the biomaterial depends on incubation time, enzyme concentration, incubation temperature, agitation, pH and use of different enzyme combination [34]. Use of the different enzyme such as pectinases, amylase, cellulases, alone and their combination can give better juice yield with superior quality of the fruit juice [34]. Pectinase enzyme breakdown complex polysaccharides into simpler molecules like galacturonic acids [17, 27]. In fruit processing industries acidic pectinase used commonly to supress the cloudiness and bitterness of the fruit [17]. For the production of pectinolytic enzyme microorganism such as Aspergillus niger or Aspergillus aculeatus are widely used [06, 17]. Now days juice industries process edible fruit in large quantities; such fruits are picked while unripe and stored for relatively long periods of time at low temperature. Under this conditions fruit juice contain starch in sufficient amounts to cause turbidity or even gelatinize during juice processing, which makes productive procedures difficult. Therefore demand for amylolytic enzymes, especially glucoamylase has increased in fruit processing industries [21]. Response Surface Methodology is an effective statistical technique for optimization of complex processes. It reduces the number of experiment trial and multiple parameters and their interaction could be studied simultaneously in a single experimental trial [18]. RSM is a collection of statistical and mathematical techniques useful for developing, improving and optimizing processes [24]. RSM technique has been employed to optimize parameter for enzymatic fruit juice clarification of fruit juice such as Carambola juice [1], Guava juice [03, 33], Carrot juice [05], Blueberry juice [12], Pineapple- Mango blend [14], Carrot-Orange blend [15], Pineapple juice [26], Sapodilla juice [37] and Banana juice [43]. Nowadays RSM is widely used approach to design of several experiments as it decreases number of trials, time and is less laborious than other approaches [14]. Use of the enzyme i.e. cellulose, pectinases, combination of these enzymes and some non-enzyme process can give better quality in terms of clarity of the fruit juice [35]. Enzyme treatment helps in degradation of pectin lead to reduction in water holding capacity of pectin, so that free is release into the system, hence juice recovery increases [35]. Juice clarification is completed by a combination of enzymatic depectinization, gelatin-silica sol, and/or bentonite treatment. The gelatin- silica sol treatment step is particularly slow, mischievous, and requires comprehensive downstream processing to obtain clarified fruit juice [28]. Enzymes are very beneficial to fruit juice industry. Their use results in higher fruit juice yield and improves physical quality characteristics such as clarity, colour, viscosity, filterability etc. [21]. In this study the optimization of combined treatment of Amylase and Pectinase was investigated with respect to temperature, time and maintaining constant enzyme treatment or incubation for clarification of Totapuri Mango pulp by using Response Surface Methodology. The study would have practical application to the mango juice processing industries. 2. MATERIALS AND METHODS 2.1. Materials and processing 2.1.1. Juice samples: Totapuri mango juice samples were provided by Jain Farm Fresh Foods Ltd, Jalgaon (Maharashtra, India). The control samples of mango pulp were kept at 50C in aseptic bag used for experimental trials. For each run 100gm of mango pulp was taken. 2.1.2. Enzymatic treatment of juice: For each experiment 100gm of juice was subjected to different enzyme treatment conditions. The independent processes variable for the enzymatic treatment process were Amylase enzyme concentration (0.05-0.45 %), Pectinase enzyme concentration (0.10-0.50 %), incubation temperature (40-60 0C) and holding time (60- 180 min). The temperature of enzyme treatment was adjusted to the desired temperature using a water bath. At the end of enzymatic treatment, the enzyme in the sample was inactivated by heating the juice at 900 C for 5 min in a water bath. After that juice filtered with the help of Muslin cloth then filter juice collected. In clear juice trace amount of Silica sol was mixed and then again filtered with the help of whatman filter paper no 1. Clear juice obtained was evaluated for their clarity, yield and colour.
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1743 Fig-1: Flow Chart for clarification of juice 2.2. Experimental Design Design-expert software with central composite design (CCD) was used to determine the effects of four independent variables viz. amylase, pectinase, incubation temperature and incubation time on juice yield, colour and clarity. The range and levels of the variables are given in table. These levels of variables were chosen based on the preliminary experiments. For the design of experiments, the test factors were coded according the following equation: Where, xi – is the dimensionless coded value of the ith independent variable; Xi – the natural value of the ith independent variable; Xo – the natural value of the ith independent variable at the centre point and the step change value. After the experiments were performed, the experimental data were fitted with 2nd order polynomial as follows Y=b0+b1x1+b2x2+b3x3+b4x4+b11x1 2+ b22x2 2+ b33x3 2+ b44x4 2+ b12x1x2+ b13x1x3+ b14x1x4+ b23x2x3+ b24x2x4+ b34x3x4 Where, Y is the predicated response; bo the intercept; b1, b2, b3, b4 the linear co-efficient; b11, b22, b33, b44 the squared co-efficient and b12, b13, b14, b23, b34 the interaction co-efficients. Table - 1: The experimental domain 2.3. Response analysis 2.3.1. Yield The clear Juice yield estimated as a percentage of weight of the clear juice obtained to the initial puree. The formula was 2.3.2. Clarity Clarity was determined by measuring the transmittance at 625nm using a UV-Visible spectrophotometer (Model Evolution 201, Thermo Fisher Scientific, Waltham, MA, USA). Distilled water was used as the reference. 2.3.3. Colour measurement The Colour of the clarified juice was measured with help of Hunter Laboratory Calorimeter (Model Colour Flex Ez spectrophotometer, Hunter Laboratory, Inc., Virginia). Where ‘+L’ Value represents lightness and ‘–L’ represents darkness. 2.4. Data analysis All statistical experimental designs and results analysis were carried out by using Design- Expert (Trial Version 10; STAT-EASE Inc., Minneapolis, MN, USA) software. The quality of fit of the polynomial model equation was expressed by the coefficient of determination, R2, and its statistical significance checked by Fisher’s F-test. The significance level of each regression co-efficient was determined by student’s t-test. The level of significance was given as p-value. 2.5. Optimization Strategy The process was numerically optimized with respect to ‘minimum’ amylase and pectinase and ‘in range’ incubation temperature and incubation time. The goal for yield, clarity and L value were taken as maximum. Independent Variable Coded Variable -2 -1 0 1 2 Amylase (%) 0.05 0.15 0.25 0.35 0.45 Pectinase (%) 0.1 0.2 0.3 0.4 0.5 Temp. (0C) 40 45 50 55 60 Time (min) 60 90 120 150 180
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1744 Table - 2: The experimental designs and results of totapuri mango clarified juice. Run Coded Level Observed Responses A B C D Yield (%) Clarity (%) L Value 1 -1 -1 -1 -1 79.8 70.88 50.94 2 1 -1 -1 -1 80.23 76.74 52.22 3 -1 1 -1 -1 78.23 75.75 51.42 4 1 1 -1 -1 80.4 77.27 52.79 5 -1 -1 1 -1 84.7 76.29 52.14 6 1 -1 1 -1 83.29 87.03 54.44 7 -1 1 1 -1 79.12 87.16 54.45 8 1 1 1 -1 89.35 87.88 54.42 9 -1 -1 -1 1 84.35 78.48 52.66 10 1 -1 -1 1 85.45 88.12 54.44 11 -1 1 -1 1 83.12 81.79 52.89 12 1 1 -1 1 90.35 84.84 53.29 13 -1 -1 1 1 84.48 85.24 54.08 14 1 -1 1 1 84.38 89.29 54.48 15 -1 1 1 1 87.43 93.54 56.88 16 1 1 1 1 91.41 85.18 53.18 17 -2 0 0 0 78.16 76.02 51.45 18 2 0 0 0 84.2 87.86 54.3 19 0 -2 0 0 82.14 78.5 52.52 20 0 2 0 0 89.42 84.58 53.24 21 0 0 -2 0 80.09 76.65 51.9 22 0 0 2 0 86.44 92.01 55.17 23 0 0 0 -2 79.3 73.89 51.1 24 0 0 0 2 88.22 84.88 53.13 25 0 0 0 0 82.24 74 51.15 26 0 0 0 0 82.4 73.9 51.01 27 0 0 0 0 82.12 74.2 51.28 28 0 0 0 0 82.28 73.95 51.08 29 0 0 0 0 82.08 74.15 51.24 30 0 0 0 0 82.42 74.12 51.21 3. RESULTS Recently enzymes have been extensively used in fruit juice clarification industries because of some advantages such as (a) complete degradation of polysaccharide into simple soluble sugar (b) maximum juice clarification (c) increases juice yield with natural colour, aroma and phenolic compound [34]. The clarified juice extracted from enzyme treated and untreated (control) clarified juice was evaluated for juice yield (%), clarity (% T) and L value (colour). Table no. 2 shows the juice yield clarity and colour under the different experimental condition enzyme combination. Response Surface Methodology is widely used method for the optimization study of the experimental and it is helps in decreasing number of trials. Therefore this technique was applied in this study. According to central composite design 30 trials were conducted. All the trials conducted by the design of Table - 3: Co-efficient of the regression equation for totapuri mango clarified juice. Term Yield Clarity Colour Co-efficent p-value Co-efficent p-value Co-efficent p-value Intercept 82.26 <0.0001 74.05 <0.0001 51.16 <0.0001
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1745 A-Amylase 1.49 0.0001 2.12 <0.0001 0.4 0.0127 B-Pectinase 1.14 0.0013 1.4 0.0024 0.22 0.1314 C-Temperature 1.46 0.0001 3.69 <0.0001 0.83 <0.0001 D-Time 2.24 <0.0001 2.89 <0.0001 0.55 0.0014 A2 -0.16 0.5528 2.15 <0.0001 0.52 0.0012 B2 0.99 0.0023 2.05 <0.0001 0.52 0.0011 C2 0.36 0.2036 2.74 <0.0001 0.69 <0.0001 D2 0.48 0.0938 1.51 0.0008 0.33 0.0224 A×B 1.47 0.0008 -2.08 0.0005 -0.48 0.0131 A×C 0.11 0.7579 -0.81 0.1055 -0.37 0.0495 A×D 0.049 0.8904 -0.65 0.1834 -0.38 0.0437 B×C 0.51 0.1669 0.66 0.1827 0.23 0.2019 B×D 0.91 0.0207 -0.81 0.106 -0.17 0.3302 C×D -0.84 0.0315 -1.11 0.0323 -0.17 0.3336esign-Expert® Software actor Coding: Actual eld (%) Design points above predicted value Design points below predicted value 1 = A: Amylase 2 = B: Pectinase ctual Factors Temperature = 50 Time = 120 0.2 0.25 0.3 0.35 0.4 0.15 0.2 0.25 0.3 0.35 78 80 82 84 86 88 90 92 Yield(%) A: Amylase (% w/w)B: Pectinase (% w/w) Design-Expert® Software Factor Coding: Actual Yield (%) Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = C: Temperature Actual Factors B: Pectinase = 0.3 D: Time = 120 45 47 49 51 53 55 0.15 0.2 0.25 0.3 0.35 78 80 82 84 86 88 90 92 Yield(%) A: Amylase (% w/w)C: Temperature (C) (a) (b) Design-Expert® Software Factor Coding: Actual Yield (%) Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = D: Time Actual Factors B: Pectinase = 0.3 C: Temperature = 50 90 100 110 120 130 140 150 0.15 0.2 0.25 0.3 0.35 78 80 82 84 86 88 90 92 Yield(%) A: Amylase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual Yield (%) Design points above predicted value Design points below predicted value X1 = B: Pectinase X2 = C: Temperature Actual Factors A: Amylase = 0.25 D: Time = 120 45 47 49 51 53 55 0.2 0.25 0.3 0.35 0.4 78 80 82 84 86 88 90 92 Yield(%) B: Pectinase (% w/w)C: Temperature (C) (c) (d)
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1746 esign-Expert® Software actor Coding: Actual eld (%) Design points above predicted value Design points below predicted value = B: Pectinase = D: Time ctual Factors Amylase = 0.25 Temperature = 50 90 100 110 120 130 140 150 0.2 0.25 0.3 0.35 0.4 78 80 82 84 86 88 90 92 Yield(%) B: Pectinase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual Yield (%) Design points above predicted value Design points below predicted value X1 = C: Temperature X2 = D: Time Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 90 100 110 120 130 140 150 45 47 49 51 53 55 78 80 82 84 86 88 90 92 Yield(%) C: Temperature (C)D: Time (Minute) (e) (f) Chart-1: Three dimension plot for yield of totapuri mango clarified juice as function of (a) amylase and pectinase ; (b) amylase and incubation temperature ; (C) amylase and incubation time; (d) pectinase and incubation temperature ; (e) pectinase and incubation time; (f) incubation temperature and incubation time. Design-Expert® Software Factor Coding: Actual Clarity (% T) Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = B: Pectinase Actual Factors C: Temperature = 50 D: Time = 120 0.2 0.25 0.3 0.35 0.4 0.15 0.2 0.25 0.3 0.35 70 75 80 85 90 95 Clarity(%T) A: Amylase (% w/w)B: Pectinase (% w/w) Design-Expert® Software Factor Coding: Actual Clarity (% T) Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = C: Temperature Actual Factors B: Pectinase = 0.3 D: Time = 120 45 47 49 51 53 55 0.15 0.2 0.25 0.3 0.35 70 75 80 85 90 95 Clarity(%T) A: Amylase (% w/w)C: Temperature (C) (a) (b) esign-Expert® Software actor Coding: Actual larity (% T) Design points above predicted value Design points below predicted value 1 = A: Amylase 2 = D: Time ctual Factors : Pectinase = 0.3 : Temperature = 50 90 100 110 120 130 140 150 0.15 0.2 0.25 0.3 0.35 70 75 80 85 90 95 Clarity(%T) A: Amylase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual Clarity (% T) Design points above predicted value Design points below predicted value X1 = B: Pectinase X2 = C: Temperature Actual Factors A: Amylase = 0.25 D: Time = 120 45 47 49 51 53 55 0.2 0.25 0.3 0.35 0.4 70 75 80 85 90 95 Clarity(%T) B: Pectinase (% w/w)C: Temperature (C) (c) (d)
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1747 Design-Expert® Software Factor Coding: Actual Clarity (% T) Design points above predicted value Design points below predicted value X1 = B: Pectinase X2 = D: Time Actual Factors A: Amylase = 0.25 C: Temperature = 50 90 100 110 120 130 140 150 0.2 0.25 0.3 0.35 0.4 70 75 80 85 90 95 Clarity(%T) B: Pectinase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual Clarity (% T) Design points above predicted value Design points below predicted value X1 = C: Temperature X2 = D: Time Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 90 100 110 120 130 140 150 45 47 49 51 53 55 70 75 80 85 90 95 Clarity(%T) C: Temperature (C)D: Time (Minute) (e) (f) Chart-2: Three dimension plot for clarity of totapuri mango clarified juice as function of (a) amylase and pectinase ; (b) amylase and incubation temperature ; (C) amylase and incubation time; (d) pectinase and incubation temperature ; (e) pectinase and incubation time; (f) incubation temperature and incubation time . Design-Expert® Software Factor Coding: Actual L value Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = B: Pectinase Actual Factors C: Temperature = 50 D: Time = 120 0.2 0.25 0.3 0.35 0.4 0.15 0.2 0.25 0.3 0.35 50 51 52 53 54 55 56 57 Lvalue A: Amylase (% w/w)B: Pectinase (% w/w) Design-Expert® Software Factor Coding: Actual L value Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = C: Temperature Actual Factors B: Pectinase = 0.3 D: Time = 120 45 47 49 51 53 55 0.15 0.2 0.25 0.3 0.35 50 51 52 53 54 55 56 57 Lvalue A: Amylase (% w/w)C: Temperature (C) (a) (b) Design-Expert® Software actor Coding: Actual value Design points above predicted value Design points below predicted value X1 = A: Amylase X2 = D: Time Actual Factors B: Pectinase = 0.3 C: Temperature = 50 90 100 110 120 130 140 150 0.15 0.2 0.25 0.3 0.35 50 51 52 53 54 55 56 57 Lvalue A: Amylase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual L value Design points above predicted value Design points below predicted value X1 = B: Pectinase X2 = C: Temperature Actual Factors A: Amylase = 0.25 D: Time = 120 45 47 49 51 53 55 0.2 0.25 0.3 0.35 0.4 50 51 52 53 54 55 56 57 Lvalue B: Pectinase (% w/w)C: Temperature (C) (c) (d)
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1748 esign-Expert® Software actor Coding: Actual value Design points above predicted value Design points below predicted value 1 = B: Pectinase 2 = D: Time ctual Factors : Amylase = 0.25 : Temperature = 50 90 100 110 120 130 140 150 0.2 0.25 0.3 0.35 0.4 50 51 52 53 54 55 56 57 Lvalue B: Pectinase (% w/w)D: Time (Minute) Design-Expert® Software Factor Coding: Actual L value Design points above predicted value Design points below predicted value X1 = C: Temperature X2 = D: Time Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 90 100 110 120 130 140 150 45 47 49 51 53 55 50 51 52 53 54 55 56 57 Lvalue C: Temperature (C)D: Time (Minute) (e) (f) Chart-3: Three dimension plot for colour (L value) of totapuri mango clarified juice as function of (a) amylase and pectinase ; (b) amylase and incubation temperature ; (C) amylase and incubation time; (d) pectinase and incubation temperature ; (e) pectinase and incubation time; (f) incubation temperature and incubation time. experiment. The experimental run values for all three responses such as juice yield, clarity and colour (L value) under different condition are given in table no. 2. The effects of change in variable on process response are explained in turns of their statistical coefficient in table no. 3. The analysis of variance (ANOVA) of three independent variables i. e, yield, clarity and colour, showed the experiment data add coefficient of determination near to unity with the calculated model no significant lack to fit at < 0.05. The variable were analyzed for their linear, quadratic and interactive effect gave the following equation (in terms of coded unit) to predict the juice yield, clarity and colour with experimental domain. Juice yield = 82.26 + 1.49 (Amylase) + 1.14 (Pectinase) + 1.46 (Temperature) + 2.24 (Time) 1.47 (Amylase × Pectinase) + 0.11 (Amylase × Temperature) + 0.049 (Amylase ×Time) + 0.51 (Pectinase × Temperature) + 0.91 (Pectinase × Time) – 0.84 (Temperature × Time) - 0.16 (Amylase2) + 0.99 (Pectinase2) + 0.36 (Temperature2) + 0.48 (Time2) Juice clarity = 74.05 + 2.12 (Amylase) + 1.40 (Pectinase) + 3.69 (Temperature) + 2.89 (Time) -2.08 (Amylase × Pectinase) – 0.81 (Amylase × Temperature) -0.65 (Amylase ×Time) + 0.66 (Pectinase × Temperature) -0.81 (Pectinase × Time) – 1.11 (Temperature × Time) + 2.15 (Amylase2) + 2.05 (Pectinase2) + 2.74 (Temperature2) + 1.51 (Time2) Juice colour = 51.16 + 0.40 (Amylase) + 0.22 (Pectinase) + 0.83 (Temperature) + 0.55 (Time) -0.48 (Amylase × Pectinase) – 0.37 (Amylase × Temperature) -0.38 (Amylase ×Time) + 0.23 (Pectinase × Temperature) -0.17 (Pectinase × Time) – 0.17 (Temperature × Time) + 0.52 (Amylase2) + 0.52 (Pectinase2) + 0.69 (Temperature2) + 0.33 (Time2) Table - 4: Regression analysis (ANOVA) for process response of totapuri mango clarified juice. Response Source Sum of square Degree of Freedom Mean square F-value P-value Yield Model 335.43 14 25.25 12.71 <0.0001 Residual 29.8 15 1.99 Total 383.24 29 C. V.=1.69% R2=0.9222 Adj R2= 0.8496 Clarity Model 1172.12 14 83.72 23.81 <0.0001 Residual 52.74 15 3.52 Total 1224.86 29 C. V.=2.32% R2=0.9569 Adj R2= 0.9168 Colour Model 61.25 14 4.38 9.31 <0.0001 Residual 7.05 15 0.47 Total 68.3 29 C. V.=1.30% R2=0.8968 Adj R2= 0.8004
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1749 3.1. ANOVA The model was judged for its adequacy by the Fisher’s F- test. If the model is good predictor of the experiment results that time calculated F-value should be several times greater than p value as per software. F value obtained 12.71 for yield, 23.81 for clarity and 9.31 for colour. Therefore pass Fisher’s F-test. The acceptability of model was also verified by very low probability value (p model < 0.001) for all the responses and there is a quadratic relationship between the independent variable and response variable. The goodness of fit model was examined by the coefficient of determination (R2) is defined as the ratio of the total variation and is a measure of the degree of fit. The closer the value of R2 value of unity, the better empirical model fits the actual data. The R2 in the model were (0.9222, 0.9569 and 0.8968). Therefor R2 values for the response variable were than higher than 0.8 which indicates the empirical model fits the actual data. The coefficient of variation (C.V.) describes to which extent the data are dispersed and C. V. defined as a measure mean. The lower values of coefficient of Variation (C.V. yield = 1.69 %, C. V. clarity = 2.32 % and C. V. Colour= 1.30 %) suggested that the experimental results were precise and reliable [14, 26, 31, 38]. 3.2 Response Surface Analysis 3.2.1 Juice Yield Pectinase helps in pectin hydrolysis, which causes reduction in pulp viscosity and a significant increase in clarified juice Yield [06]. The juices obtained after multienzymatic treatment had more yield and corresponding clarity than untreated one i. e. control because of the reduction of xylan, pectin and starch content [06]. For the first composition yield of the extracted juice was in a range from 78.16 to 91.41 %. The minimum yield was observed when concentration amylase 0.05 %, concentration pectinase 0.30 % was used for 120 min at 50oC. The maximum yield was at all coded variable ‘+1’ means amylase 0.35 %, pectinase concentration 0.40 % at 55oC for 150 min. All the independent variables with respect to their importance were checked by keeping values changing of two independent variables and remaining two independent were kept constant. Chart 1 showing the three dimensional response surfaces plot for the effect of the independent variable on the yield of clarified juice. To understand the interaction of different variables and the optimum level of each variable the response surfaces curves were plotted. Each response surface curves explains the effect of two variables while remaining two variables at middle level. In Chart 1 (a) represents the interactive effect of Amylase (%) and Pectinase (%) on the juice yield, whereas the temperature (0C) and time (min) was kept at middle level that is 500C temperature for 120 min. Similarly all independent variables interchanged by keeping two constant and two variables. Chart 1 (b) shows interactive effect between temperature (0C) and Amylase (%) where other variables i.e. Pectinase (%) and time (min) was kept constant. 3.2.2 Clarity The clarity was an important parameter of clarified juice [41]. Clarified juice clarity ranged from 70.88 % T to B C D (a) A B C D (b) T)%y(ritCla Deviation from Reference Point (Coded Units) Perturbation DC BA 95 90 85 80 75 70 -1.000 -0.500 0.000 0.500 1.000 Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 C: Temperature = 50 D: Time = 120 (%)ldYie Deviation from Reference Point (Coded Units) Perturbation D C A B A 92 90 88 86 84 82 80 78 -1.000 -0.500 0.000 0.500 1.000 Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 C: Temperature = 50 D: Time = 120 Design-Expert® Software Factor Coding: Actual Yield (%) Design-Expert® Software Factor Coding: Actual Clarity (% T)
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1750 Design-Expert® Software Factor Coding: Actual L value Actual Factors A: Amylase = 0.25 B: Pectinase = 0.3 C: Temperature = 50 D: Time = 120 -1.000 -0.500 0.000 0.500 1.000 50 51 52 53 54 55 56 57 A A B B C C D D Perturbation Deviation from Reference Point (Coded Units) Lvalue (c) Chart-4: Perturbation graph showing the effect of independent variables on (a) yield (b) clarity and (C) colour of totaouri mango clarified juice (A- amylase, B- pectinase, C- incubation temperature, D- incubation time). Table - 5: Constraints, criteria for optimization, solution, along with predicted and observed response value of mango clarified Juice. Criteria Goal Importance Solutions Observed Response Amylase ( % w/w) Minimize 3 0.15 Pectinase ( % w/w) Minimize 3 0.2 Incubation Temperature (0C) In the range 3 55 Incubation Time (Min) In the range 3 150 Yield (%) Maximize 3 84.04 84.24 Clarity (%T) Maximize 3 83.97 84.74 L Value Maximize 3 54.02 54.01 93.54 % T (table no. 1). The clarity was maximum in run no. 15 when amylase concentration 0.15 %, pectinase concentration 0.40 % used for 150 min at 55oC, whereas minimum juice clarity was at amylase concentration 0.15 %, pectinase concentration 0.20 % at 45oC for 90 min. All the four variables with respect to their importance were checked by keeping values changing of two independent variables and remaining two independent were kept constant. Chart 2 (a) represents the 3-D surface graphics showing the interactive effects between variables pectinase and amylase where the variable kept constant at 500C temperature and time 120 min respectively. Similarly all graphs were represented. 3.2.3 Colour (L value) The appearance characteristics, for example colour i. e. lightness or darkness was the first judgement of a clarified juice quality. A dark product would mean that the clarified juice was deteriorating and it was usually less appealing to the consumer [41]. A dark product means that the clarified juice is deteriorated and it is usually less appealing to the consumer [18]. L value of the Mango clarified juice ranges from 50.94 to 56.88. The L value 50.94 showing the product was dark therefore consumer will not prefer to buy it. Chart 3 (a) represent the interaction effect of amylase and pectinase on colour. Likewise all graphs were represented. 3.3 Perturbation Interpretation The simultaneous effect of variation in levels of all the four independent factors on process response can be seen in perturbation graph (Chart 4). Curve indicates yield (%), clarity (%T) and colour (L value) in Chart 4. According to the curve shown in Chart 4 (a), as the incubation time and pectinase concentration increases, yield of juice also increases. This is due to the presence of pectin compound in the mango juice which affects the yield of clarified mango juice. Clarity (% T) and colour (L value) of clarified juice depends on the incubation temperature. Perturbation curve indicates enzyme activity depends on the incubation temperature therefore it is necessary to maintain the
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 04 | Apr-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 1751 optimum temperature in the fruit juice clarification process. 3.4 Optimization Even though the purpose of using enzyme in fruit processing process is to improve physio chemical characteristic of the product, cost also is a crucial industrial factor to be taken consider into account in order to achieve a reasonable operational condition, cost on enzyme is more therefore enzyme concentration is the one which has the greatest impact on the process cost. Thus low enzyme concentration was used to optimization condition. The optimization condition for the production of mango clarified juice containing maximum yield, colour and clarity was determined by the numerical optimization with chosen each variable and response was given table no. 5. For this composition the predicted that conditions which contain amylase concentration 0.15 %, pectinase 0.2 % at 550C temperature for 150 min incubation time would produce the maximum values clarified mango juice yield 84.04 %, with clarity 83.97 %T and L value 54.02. The suitability of the modern equation was performed using the recommended optimum condition. The experimental result shows in the table no. 5. This result shows that closer to the predicted values by the software which indicating that each model was quite accurate in prediction. 4. CONCLUSION Central Composite design was found to be efficient and valuable statistical tool for analysing and optimizing the effects of enzyme concentration, incubation temperature and incubation time on multienzymatic clarification of mango juice clarification. The recommended enzymatic treatment for composition is pectinase 0.15%, amylase 0.20%, incubation temperature 550C at for 150min. The optimum condition of the model equation was performed using the recommended optimal conditions shows that close to predicate values indicating that each model was quite accurate in prediction. This study would be helpful for fruit processing industries worldwide, especially this study helpful for mango processing industry as the potential procedure of mangoes juice and clarified mango juice because of the good demand and for its known nutritive value and taste. The response surface and numerically optimization methods give rise to a better understanding the optimizing the clarification process. ACKNOWLEDGEMENT The authors would like to acknowledge the support from all the Staff of Department of Agricultural Engineering, Maharashtra Institute of Technology, Aurangabad and also thank full to management of Jain Farm Fresh Foods Ltd., Jalgaon. REFERENCES [01] Abdullah, A. G, Sulaiman, N. M., Aroua, M. K. and Megat Mohd Noor, M. J., “Response Surface Optimization of conditions for clarification of Carambola fruit juice using a commercial enzyme,” J. Food Eng. Vol-81, (2007), pp 65-71. [02] Ahmed, B., Uddin, M. B. and Jubayer, M. F., “Extraction and standardization of selected fruit juices by enzymatic process,” Peak Journal of Food Science and Technology. Vol-2, issue 2, (2014), pp 18-27. [03] Akesowan, A. and Choonhahirun, A., “Effect of enzyme treatment on Guava juice production using Response Surface Methodology,” The Journal of Animal & Plant Sciences. Vol- 23, issue 1, (2013), pp 114-120. [04] Akhtar, S, Riza, M., Ahmad, A. and Nisar, A., Physico-Chemical, “Microbiological and Sensory stability of chemically preserved Mango pulp,” Pak. J. Bot. Vol- 42, issue 2, (2010), pp 853-862. [05] Alam, Md. S, Ahuja, G. and Gupta, K., “Enzymatic clarification of carrot juice by using response surface methodology,” Agric Eng Int: CIGR Journal. Vol- 16, issue 3, (2014), pp 173-179. [06] Anuradha, K., Padma, N., Venkateshwar and Reddy, G., “Mango juice clarification with polygalacturonase produced by Aspergillus awamori MTCC 9166 – Optimization of conditions,” International Food Research Journal. Vol- 23, issue 1, (2016), pp 147-151. [07] Arampath, P. C., and Vincent, J., “Production of Clarified, Concentrated Juice from Mango Variety Kaew,” Tropical Agricultural Research. Vol- 9, (1997), pp 49-61. [08] Armistice, C., Stanley.T, N. and Augustine, M., “Production and optimisation of Mango juice clarification using a manually pressurised filter at medium scale level in Rusitu Valley,” Ziwbabwe, International Journal of food and Nutritional sciences, Vol- 4, issue 5, (2015), pp 131-136. [09] Bafna, P.G., “Optimization of process parameters for extraction of Kokum (Garcinia Indica) fruit pulp using Response Surface Methodology (RSM),” International Journal of Scientific & Engineering Research. Vol- 3, issue 8, (2012) pp 1-7. [10] Chongkhong, S. and Kongjindamunee, W., “Optimization of enzymatic clarification from Corncob, International Transaction Journal of Engineering,” Management, & Applied Sciences & Technologies. Vol.- 5, issue 1, (2014), pp 67-76
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