Baskar Gurunathan | St. Joseph's College of Engineering (original) (raw)

Uploads

Papers by Baskar Gurunathan

Environmental progress & sustainable energy, May 18, 2023

h i g h l i g h t s Esterification of oleic acid using magnetic ionic liquid. Multi-objective opt... more h i g h l i g h t s Esterification of oleic acid using magnetic ionic liquid. Multi-objective optimization was performed for two responses. Both predicted yield and conversion were 83.4% at optimum conditions. Recycled ionic liquid can be used repeatedly without significant activity loss. Low activation energy and pre-exponential factor for esterification of oleic acid.

Turkish Journal of Zoology

Research on bio-ethanol production has been promoted since the recent past as the fuel is efficie... more Research on bio-ethanol production has been promoted since the recent past as the fuel is efficient, biodegradable, environment friendly and cost effective alternate for the existing fossil fuel. Agricultural and forestry raw materials can be utilized to produce renewable energy in the form of liquid/gaseous fuel which has got reduced CO2 emission on combustion unlike fossil fuels and hence it has an impact on climate variations. Bio-ethanol derived from lignocellulosic material is a potential renewable carbon source and behaves as an alternative fuel to the existing conventional fuel. In this paper, ethanol production by Simultaneous Saccharification and Fermentation (SSF) process from lignocellulosic materials of the soft wood (Moringa oleifera) has been performed by using the thermo-tolerant yeast Kluyveromyces marxianus MTCC 1338. This soft wood appears to be one of the best sources of renewable energy and it has given the highest yield when compared to other substrates. This pa...

Sustainable Energy Technologies and Assessments

Journal of Chemical Engineering Research Updates, 2014

The search for rennet substitutes such as microbial rennet has increased fold due to increase in ... more The search for rennet substitutes such as microbial rennet has increased fold due to increase in the demand for cheese products. Microbial rennet covers about one-third of the cheese consumption worldwide. Hence it is important to develop commercially viable and cost efficient method for purification of rennet from microbial sources. Hence the present work was focused on the production and purification of microbial rennet from Aspergillus candidus. The rennet was purified using a two step purification process involving solvent precipitation and chromatographic separation. The purity of the milk clotting enzyme was increased by 7.43 fold by solvent precipitation using equal mixture of 150% (v/v) ethanol-acetone. Then the enzyme was further purified using Diethylaminoethyl (DEAE) cellulose chromatography and 10.45 fold increase in enzyme activity was obtained after purification. The temperature of 35°C and substrate concentration of 0.25 mg/ml were found as optimum for maximum enzyme ...

Energy, Environment, and Sustainability, 2017

In India, 12 lakhs deaths per annum take place due to air pollution according to a report by Gree... more In India, 12 lakhs deaths per annum take place due to air pollution according to a report by Greenpeace organization. Volatile organic compounds are major air pollutants which are released into the environment through mobile sources, stationary sources, area sources, and natural sources. Stationary sources such as petrochemical and pharmaceutical industries release VOCs like toluene which is known to cause several health hazards including lung cancer. In addition to it, VOCs pollute air, soil, and water which are a growing environmental concern. Based on the concentration level of the VOCs, several removal techniques have been employed to combat VOCs. Non-biological methods such as ozonation, absorption, adsorption, incineration, catalytic oxidation, condensation, membrane separation are being employed. Several biological methods ranging from biotrickling filters to biofilters have been demonstrated, and they are found to be economical. The biofilters are simple to construct, easy to operate, and cost effective. Major advantage of this method is the pollutant is converted into biodegradable waste which can decompose within a moderate time frame, thus producing no secondary pollutants. In this chapter, biofilters, microorganisms, biofilter preparation and reaction mechanism are discussed. More emphasis was given on operation, processes, conditions, and stability of biofilters. The recent advancements in biofilters including application of foam for enhanced separation

The present scenario of increased population and industrial development leads to deterioration of... more The present scenario of increased population and industrial development leads to deterioration of freshwater and decreases the quality of water all over the world. This causes freshwater shortage in most of the area. Moreover, organic and inorganic substances released from various sources into the existing natural water bodies or environment lead to pollution. The primary and secondary treatment of wastewater had been introduced in many numbers of places to extinguish the easily settled material and to oxidize the organic matter in wastewater. But these methods were not found to be efficient because the effluent from secondary treatment is loaded with increased amount of inorganic nitrogen and phosphorus, and so, it leads to eutrophication and much more long-standing problems because of discharged heavy metals and refractory organics. On the other side, wastewater contains numerous ingredients, and interestingly, some of the compounds in the wastewater, like nitrogen and phosphorus,...

Industrial discharge has tremendously increased inorganic pollutants in water bodies all over the... more Industrial discharge has tremendously increased inorganic pollutants in water bodies all over the world. Paper and pulp mill effluent is included in one of the most pollution-generating discharges containing complex chemical compounds such as lignin. For clean and healthy water resources, the recovery of lignin from wastewater from the paper and pulp industry is of high importance. On the other hand, these pollutants can be carcinogenic, due to the chlorine lignin and chlorine phenols that are formed along the process. The main focus of this study on precipitation of lignin from the black liquor (influent) is one stage followed by dewatering/washing to improve purity of lignin. Lignin valorization is an essential process for an advanced, sustainable, and economical biomass-based industry. However, converting lignin into value-added products remains a challenge due to its heterogeneity and irregular structure. Complex nature of lignin depolymerized by aromatic-catabolizing organisms ...

Man’s environment consists of natural resources like air, land, water, plants, and animals. With ... more Man’s environment consists of natural resources like air, land, water, plants, and animals. With the progress of industrialization and civilization, man has interacted with his surroundings and disturbed the nature. It leads to environmental pollution, which cannot be eradicated by nature’s self-acting process, i.e., various biogeochemical cycles. Environmental problems stem from two main categories of human activities: (a) resources utilization at unsustainable levels and contamination of the environment through pollution and (b) discharge of wastes at levels beyond the earth’s and environment’s capacity to absorb them or render them harmless which results in ecological damage and degradation of the environment. Environmental damage around includes pollution of water and air and consequent health problems, biodiversity loss, deterioration of buildings and monuments, soil fertility loss, desertification, ozone depletion, and many more. Environmental protection and management has bec...

Environmental Technology & Innovation

International Journal of ChemTech Research, 2014

Energy, Environment, and Sustainability