Yogesh Chendake | Bharati Vidyapeeth Deemed University Pune (original) (raw)

Papers by Yogesh Chendake

ES Materials & Manufacturing

Journal of Membrane Science, 2014

A method of 'Chemodialysis' (CD) involving polybenzimidazole (PBI) as a chemically active membran... more A method of 'Chemodialysis' (CD) involving polybenzimidazole (PBI) as a chemically active membrane material is demonstrated for carrying out selective separation of organic acids. PBI membranes possessing basic functionality selectively sorb acid, which is transported to the permeate side by concentration gradient. Transported acid is removed from the permeate side by using stripping agent. The sorption of non-acidic organic (glucose) and inorganic (NaCl) solutes being absent in PBI membranes, they were not transported on the permeate side. This offered high selectivity towards transporting acid. Three structurally different PBIs were evaluated as membrane materials for acid sorption and transport. Effects of variation in operational temperature, concentration and type of stripping solvent were evaluated. A single step process with appreciable acid transport rate coupled with very high selectivity convey promises of 'Chemodialysis' towards its applicability for the separation of organic acids from various industrial process streams (e.g. during production of organic acids by biological routes, which usually involve number of steps and extensive usage of chemicals for their recovery from fermentation broth). Moreover, this process holds additional benefit of low energy requirement, since it works with concentration gradient as the driving force and requires energy only for the circulation of solutions.

CRC Press eBooks, Nov 17, 2022

CRC Press eBooks, Nov 17, 2022

Asian Journal of Chemistry

Agriculture production is mainly dependent upon the climate and atmospheric condition variations.... more Agriculture production is mainly dependent upon the climate and atmospheric condition variations. A small variation in atmospheric condition has large precursion on agriculture production. Whereas daily temperature variation upto 10 can be observed in several parts of India. This variation can affect crop production adversely. Hence, formation and optimization of polycarbonate based polyhouse is investigated in this work. Further, it was observed that the materials and properties of polysheet would affect temperature and other condition of polyhouse. In current work, the material optimization was investigated and observed that an introduction of UV active nanomaterials provides better climatic control of polycarbonate based polyhouse. Applications of ZnO or TiO2 enhance the absorbance of UV rays from sunlight and resulted in large control on greenhouse environment. This helps to provide enhanced control on greenhouse conditions. The effect of presence of polycarbonate with 0.3% TiO2...

Lecture notes in civil engineering, Sep 17, 2022

Asian Journal of Chemistry

Walnut shell was used as an adsorbent for adsorption of acetic acid. Batch experiments were condu... more Walnut shell was used as an adsorbent for adsorption of acetic acid. Batch experiments were conducted for adsorption equilibrium studies and kinetics by using walnut shell. Optimization of parameters like temperature, rotation, adsorbent dose and contact time were studied. Amount of acetic acid adsorbed was analyzed by titration. Equilibrium condition was investigated. Adsorption kinetics were tested for different models and found best suitable for intraparticle diffusion model. The batch experimental data was fitted to Langmuir, Freundlich, Temkin, Sips and Redlich-Peterson isotherms. The best fitted isotherm was Langmuir isotherm. Regeneration was tried by heating the adsorbent in microwave at 200 ºC. Up to three cycles adsorbent gave good efficiency for adsorption of acetic acid.

Water, Air, & Soil Pollution

Bioorganic & Medicinal Chemistry, 2006

Ten 4-aryl-1,4-dihydropyridine and three 4-aryl-1,2,3,4-tetrahydropyrimidin-2-one derivatives hav... more Ten 4-aryl-1,4-dihydropyridine and three 4-aryl-1,2,3,4-tetrahydropyrimidin-2-one derivatives have been synthesized and examined for their activity against pathogenic strains of Aspergillus fumigatus and Candida albicans. Although none of the three compounds belonging to pyrimidin-2-one series showed any activity against two pathogens, two of the compounds of the dihydropyridine series, that is, diethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridin-3,5-dicarboxylate and dimethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridin-3,5-dicarboxylate, exhibited significant activity against A. fumigatus in disc diffusion, microbroth dilution and percent spore germination inhibition assays. The most active diethyl dihydropyridine derivative exhibited a MIC value of 2.92 lg/disc in disc diffusion and 15.62 lg/ml in microbroth dilution assays. The MIC 90 value of the most active compound by percent germination inhibition assay was found to be 15.62 lg/ml. The diethyl dicarboxylate derivative of dihydropyridine also exhibited appreciable activity against C. albicans. The in vitro toxicity of the most active diethyl dihydropyridine derivative was evaluated using haemolytic assay, in which the compound was found to be non-toxic to human erythrocytes even at a concentration of 625 lg/ml. The standard drug amphotericin B exhibited 100% lysis of erythrocytes at a concentration almost 16 times less than the safer concentration of the most active dihydropyridine derivative.

Polysulfone based ultrafiltration (UF) membranes are contemplated to be one of the most important... more Polysulfone based ultrafiltration (UF) membranes are contemplated to be one of the most important separation material with large benefits of hydrolytic stability, chemical resistance, high strength, creep resistance etc. Due to these benefits it can be applied in diversified applications of gas separation, food and beverage processing, electro paint recovery, etc. PSF membranes are applicable in wide range of filtration spectra from microfiltration (MF) to reverse osmosis (RO). Optimization of membrane porosity and pore size are very difficult due to unstable solutions. Hence optimization of PSF membrane formation based upon effect of affecting parameters during phase inversion based membrane preparation is done. The concentration of dope solution, solvent of preparation of dope solution and other operating parameters such as humidity, temperature, pressure, etc. strongly affect membrane properties. The decreasing trend of concentration of doped solution is witnessed with the increa...

Today's world is of technological developments, which requires huge amount of energy in day to da... more Today's world is of technological developments, which requires huge amount of energy in day to day life. Biogas is the sources of clean and renewable energy, without causing environmental impact are highly desirable. Generation of electricity from biomass is one of the best examples of energy generation. Biogas is an environment friendly and economic alternative to fossil fuel. It is way of sustainable energy production at low cost. Here biogas is produced from cow manure by traditional method and Energy is produced in the form of electricity. In this paper, biogas production rate and their operating parameters are investigated along with gas generator efficiency. Application of produced biogas in electricity generation resulted large amount of energy generation also use of exhaust gases in cow urine distillation resulted in large energy saving.

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020

Bioprocess and Biosystems Engineering, 2017

Efficient yet economic production of biofuel(s) by using varied second-generation feedstock needs... more Efficient yet economic production of biofuel(s) by using varied second-generation feedstock needs to be explored in current scenario to cope up with global fuel demand. Hence, present study was performed to reveal the use of cauliflower waste for acetone-butanol-ethanol (ABE) production using Clostridium acetobutylicum NRRL B 527. The proximate analysis of cauliflower waste demonstrated to comprise 17.32 % cellulose, 9.12 % hemicelluloses, and 5.94 % lignin. Drying of cauliflower waste was carried out in the temperature range of 60-120 °C to investigate its effect on ABE production. The experimental drying data was simulated using moisture diffusion control model. The cauliflower waste sample dried at 80 °C showed maximum total sugar yield of 26.05 g L-1. The removal of phenolics, acetic acid and total furans were found to be 90-97 %, 10-40 %, and 95-97 %, respectively. Incidentally, maximum ABE titer obtained was 5.35 g L-1 with 50 % sugar utilization.

Desalination and Water Treatment, 2012

A process of chemo-dialysis involving poly(benzimidazole) (PBI) as a chemically active membrane m... more A process of chemo-dialysis involving poly(benzimidazole) (PBI) as a chemically active membrane material is proposed for the transport of inorganic acids. These membranes possessing basic nature selectively bind acid molecules present in the feed solution due to acid-base interactions. They are transported across the membrane by concentration gradient as the driving force. The transported acid molecules are stripped away from other side of the membrane surface by a suitable stripping agent or water. Effects of nature of feed acid (pK a , molecular size), its concentration in the feed solution and the nature of stripping agent (base or water) on acid transport properties are presented. Membranes showed appreciable transport rates for three acids, viz., H 2 SO 4 , HCl and HNO 3. The fl uxes for different acids varied from 16.1 to 140.7 g/m 2 h under different operating conditions. Most signifi cantly, there was no transport of non-acidic solutes such as NaCl or glucose. This could be made possible since these solutes neither get sorbed in the membrane matrix, nor does the membrane exhibit any porosity for the transport to occur through pores. This resulted in practically infi nite selectivity of transported acid over the non-acidic solutes. Use of water as the stripping agent allows recycling of the acid, making the process economically attractive. Moreover, possible recovery of acid and its reuse eliminated the requirement of acid neutralization and disposal; which is a routine practice followed today. Thus, this process of chemo-dialysis is economically attractive and environmentally benign.

Carbon Nanotubes for a Green Environment

Applied Biopolymer Technology and Bioplastics, 2021

Seawater desalination by reverse osmosis generates two streams generates permeate stream of pure ... more Seawater desalination by reverse osmosis generates two streams generates permeate stream of pure potable water and retentate stream containing high salt concentration. This retentate stream contains high concentration of NaCl as major component, which is either dispensed as landfill or sent to water stream used as sink. This becomes waste of valuable resource, which can have undesirable effect on environment and soil. It can be utilized as a feed in chemical processes for production of sodium carbonate. This high concentration NaCl (~ 27 %) containing retentate can be useful feed option for soda ash industry which uses NaCl solution as feed stream from either sea water having NaCl concentration of ~ 3.0 % or rock salt. Its application for production of soda ash would lead to conservation of energy required for removal of water from feed seawater or product concentration. It would in turn result in economical benefits. As an analysis such reuse can lead to large economical benefits (...

Dairy is considered to be one of the most important agriculture based industry in Indian scenario... more Dairy is considered to be one of the most important agriculture based industry in Indian scenario but despite of this fact dairy industry is also one of the most polluting industries in terms of the organic content in dairy effluent. This effluent contains a high concentration of organic matter mainly lactose, protein, whey, and mineral salts. They can be harmful to the environment, if discharged directly with the other liquid effluents from the dairy industry. It requires multistage processing before its discharge. Additionally, the milk components present in the effluent possess large applications in food, chemical and drug industry. In this study, separation and recovery of components from dairy effluent was investigated. The Polysulfone (PSF) membrane based ultrafiltration process was adopted to separate lactose and protein with high yield and purity. The quantitative analysis were done for the recovery of the milk components from the effluent and it was observed that upto 90% o...

ES Materials & Manufacturing

Journal of Membrane Science, 2014

A method of 'Chemodialysis' (CD) involving polybenzimidazole (PBI) as a chemically active membran... more A method of 'Chemodialysis' (CD) involving polybenzimidazole (PBI) as a chemically active membrane material is demonstrated for carrying out selective separation of organic acids. PBI membranes possessing basic functionality selectively sorb acid, which is transported to the permeate side by concentration gradient. Transported acid is removed from the permeate side by using stripping agent. The sorption of non-acidic organic (glucose) and inorganic (NaCl) solutes being absent in PBI membranes, they were not transported on the permeate side. This offered high selectivity towards transporting acid. Three structurally different PBIs were evaluated as membrane materials for acid sorption and transport. Effects of variation in operational temperature, concentration and type of stripping solvent were evaluated. A single step process with appreciable acid transport rate coupled with very high selectivity convey promises of 'Chemodialysis' towards its applicability for the separation of organic acids from various industrial process streams (e.g. during production of organic acids by biological routes, which usually involve number of steps and extensive usage of chemicals for their recovery from fermentation broth). Moreover, this process holds additional benefit of low energy requirement, since it works with concentration gradient as the driving force and requires energy only for the circulation of solutions.

CRC Press eBooks, Nov 17, 2022

CRC Press eBooks, Nov 17, 2022

Asian Journal of Chemistry

Agriculture production is mainly dependent upon the climate and atmospheric condition variations.... more Agriculture production is mainly dependent upon the climate and atmospheric condition variations. A small variation in atmospheric condition has large precursion on agriculture production. Whereas daily temperature variation upto 10 can be observed in several parts of India. This variation can affect crop production adversely. Hence, formation and optimization of polycarbonate based polyhouse is investigated in this work. Further, it was observed that the materials and properties of polysheet would affect temperature and other condition of polyhouse. In current work, the material optimization was investigated and observed that an introduction of UV active nanomaterials provides better climatic control of polycarbonate based polyhouse. Applications of ZnO or TiO2 enhance the absorbance of UV rays from sunlight and resulted in large control on greenhouse environment. This helps to provide enhanced control on greenhouse conditions. The effect of presence of polycarbonate with 0.3% TiO2...

Lecture notes in civil engineering, Sep 17, 2022

Asian Journal of Chemistry

Walnut shell was used as an adsorbent for adsorption of acetic acid. Batch experiments were condu... more Walnut shell was used as an adsorbent for adsorption of acetic acid. Batch experiments were conducted for adsorption equilibrium studies and kinetics by using walnut shell. Optimization of parameters like temperature, rotation, adsorbent dose and contact time were studied. Amount of acetic acid adsorbed was analyzed by titration. Equilibrium condition was investigated. Adsorption kinetics were tested for different models and found best suitable for intraparticle diffusion model. The batch experimental data was fitted to Langmuir, Freundlich, Temkin, Sips and Redlich-Peterson isotherms. The best fitted isotherm was Langmuir isotherm. Regeneration was tried by heating the adsorbent in microwave at 200 ºC. Up to three cycles adsorbent gave good efficiency for adsorption of acetic acid.

Water, Air, & Soil Pollution

Bioorganic & Medicinal Chemistry, 2006

Ten 4-aryl-1,4-dihydropyridine and three 4-aryl-1,2,3,4-tetrahydropyrimidin-2-one derivatives hav... more Ten 4-aryl-1,4-dihydropyridine and three 4-aryl-1,2,3,4-tetrahydropyrimidin-2-one derivatives have been synthesized and examined for their activity against pathogenic strains of Aspergillus fumigatus and Candida albicans. Although none of the three compounds belonging to pyrimidin-2-one series showed any activity against two pathogens, two of the compounds of the dihydropyridine series, that is, diethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridin-3,5-dicarboxylate and dimethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridin-3,5-dicarboxylate, exhibited significant activity against A. fumigatus in disc diffusion, microbroth dilution and percent spore germination inhibition assays. The most active diethyl dihydropyridine derivative exhibited a MIC value of 2.92 lg/disc in disc diffusion and 15.62 lg/ml in microbroth dilution assays. The MIC 90 value of the most active compound by percent germination inhibition assay was found to be 15.62 lg/ml. The diethyl dicarboxylate derivative of dihydropyridine also exhibited appreciable activity against C. albicans. The in vitro toxicity of the most active diethyl dihydropyridine derivative was evaluated using haemolytic assay, in which the compound was found to be non-toxic to human erythrocytes even at a concentration of 625 lg/ml. The standard drug amphotericin B exhibited 100% lysis of erythrocytes at a concentration almost 16 times less than the safer concentration of the most active dihydropyridine derivative.

Polysulfone based ultrafiltration (UF) membranes are contemplated to be one of the most important... more Polysulfone based ultrafiltration (UF) membranes are contemplated to be one of the most important separation material with large benefits of hydrolytic stability, chemical resistance, high strength, creep resistance etc. Due to these benefits it can be applied in diversified applications of gas separation, food and beverage processing, electro paint recovery, etc. PSF membranes are applicable in wide range of filtration spectra from microfiltration (MF) to reverse osmosis (RO). Optimization of membrane porosity and pore size are very difficult due to unstable solutions. Hence optimization of PSF membrane formation based upon effect of affecting parameters during phase inversion based membrane preparation is done. The concentration of dope solution, solvent of preparation of dope solution and other operating parameters such as humidity, temperature, pressure, etc. strongly affect membrane properties. The decreasing trend of concentration of doped solution is witnessed with the increa...

Today's world is of technological developments, which requires huge amount of energy in day to da... more Today's world is of technological developments, which requires huge amount of energy in day to day life. Biogas is the sources of clean and renewable energy, without causing environmental impact are highly desirable. Generation of electricity from biomass is one of the best examples of energy generation. Biogas is an environment friendly and economic alternative to fossil fuel. It is way of sustainable energy production at low cost. Here biogas is produced from cow manure by traditional method and Energy is produced in the form of electricity. In this paper, biogas production rate and their operating parameters are investigated along with gas generator efficiency. Application of produced biogas in electricity generation resulted large amount of energy generation also use of exhaust gases in cow urine distillation resulted in large energy saving.

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020

Bioprocess and Biosystems Engineering, 2017

Efficient yet economic production of biofuel(s) by using varied second-generation feedstock needs... more Efficient yet economic production of biofuel(s) by using varied second-generation feedstock needs to be explored in current scenario to cope up with global fuel demand. Hence, present study was performed to reveal the use of cauliflower waste for acetone-butanol-ethanol (ABE) production using Clostridium acetobutylicum NRRL B 527. The proximate analysis of cauliflower waste demonstrated to comprise 17.32 % cellulose, 9.12 % hemicelluloses, and 5.94 % lignin. Drying of cauliflower waste was carried out in the temperature range of 60-120 °C to investigate its effect on ABE production. The experimental drying data was simulated using moisture diffusion control model. The cauliflower waste sample dried at 80 °C showed maximum total sugar yield of 26.05 g L-1. The removal of phenolics, acetic acid and total furans were found to be 90-97 %, 10-40 %, and 95-97 %, respectively. Incidentally, maximum ABE titer obtained was 5.35 g L-1 with 50 % sugar utilization.

Desalination and Water Treatment, 2012

A process of chemo-dialysis involving poly(benzimidazole) (PBI) as a chemically active membrane m... more A process of chemo-dialysis involving poly(benzimidazole) (PBI) as a chemically active membrane material is proposed for the transport of inorganic acids. These membranes possessing basic nature selectively bind acid molecules present in the feed solution due to acid-base interactions. They are transported across the membrane by concentration gradient as the driving force. The transported acid molecules are stripped away from other side of the membrane surface by a suitable stripping agent or water. Effects of nature of feed acid (pK a , molecular size), its concentration in the feed solution and the nature of stripping agent (base or water) on acid transport properties are presented. Membranes showed appreciable transport rates for three acids, viz., H 2 SO 4 , HCl and HNO 3. The fl uxes for different acids varied from 16.1 to 140.7 g/m 2 h under different operating conditions. Most signifi cantly, there was no transport of non-acidic solutes such as NaCl or glucose. This could be made possible since these solutes neither get sorbed in the membrane matrix, nor does the membrane exhibit any porosity for the transport to occur through pores. This resulted in practically infi nite selectivity of transported acid over the non-acidic solutes. Use of water as the stripping agent allows recycling of the acid, making the process economically attractive. Moreover, possible recovery of acid and its reuse eliminated the requirement of acid neutralization and disposal; which is a routine practice followed today. Thus, this process of chemo-dialysis is economically attractive and environmentally benign.

Carbon Nanotubes for a Green Environment

Applied Biopolymer Technology and Bioplastics, 2021

Seawater desalination by reverse osmosis generates two streams generates permeate stream of pure ... more Seawater desalination by reverse osmosis generates two streams generates permeate stream of pure potable water and retentate stream containing high salt concentration. This retentate stream contains high concentration of NaCl as major component, which is either dispensed as landfill or sent to water stream used as sink. This becomes waste of valuable resource, which can have undesirable effect on environment and soil. It can be utilized as a feed in chemical processes for production of sodium carbonate. This high concentration NaCl (~ 27 %) containing retentate can be useful feed option for soda ash industry which uses NaCl solution as feed stream from either sea water having NaCl concentration of ~ 3.0 % or rock salt. Its application for production of soda ash would lead to conservation of energy required for removal of water from feed seawater or product concentration. It would in turn result in economical benefits. As an analysis such reuse can lead to large economical benefits (...

Dairy is considered to be one of the most important agriculture based industry in Indian scenario... more Dairy is considered to be one of the most important agriculture based industry in Indian scenario but despite of this fact dairy industry is also one of the most polluting industries in terms of the organic content in dairy effluent. This effluent contains a high concentration of organic matter mainly lactose, protein, whey, and mineral salts. They can be harmful to the environment, if discharged directly with the other liquid effluents from the dairy industry. It requires multistage processing before its discharge. Additionally, the milk components present in the effluent possess large applications in food, chemical and drug industry. In this study, separation and recovery of components from dairy effluent was investigated. The Polysulfone (PSF) membrane based ultrafiltration process was adopted to separate lactose and protein with high yield and purity. The quantitative analysis were done for the recovery of the milk components from the effluent and it was observed that upto 90% o...