Search

Your search keyword '"M. Jothieswari"' showing total 4 results
Start Over Author "M. Jothieswari"
4 results on '"M. Jothieswari"'

1. Tannery wastewater treatment process to minimize residual organics and generation of primary chemical sludge

Author

S. Swarnalatha, K. Patchai Murugan, M. Jothieswari, Ganesan Sekaran, and N. Prabhakaran

Subjects
Total organic carbon, Biochemical oxygen demand, Pollutant, Environmental Engineering, Wastewater, Chemical oxygen demand, Environmental Chemistry, Environmental science, Sewage treatment, Biodegradation, Ammoniacal nitrogen, General Agricultural and Biological Sciences, Pulp and paper industry
Abstract

Wastewater discharge from the leather manufacturing process involves various operations such as beam house, tanning and post-tanning. The conventional treatment system does not efficiently treat these kinds of wastewaters without the generation of any secondary pollutant. Mostly vast quantities of chemicals are added to the wastewaters to adjust pH to favour the treatment units that results in a huge amount of primary chemical sludge. This paper reports a new treatment approach by mixing various tannery operational wastewaters in the appropriate treatment units to adjust pH instead of adding chemicals. It also designed a treatment sequence to simultaneously treat all tannery operational wastewaters in such a way to suit their biodegradability and to avoid sludge to a greater extent. The treated water resulted in biochemical oxygen demand, 58 ± 39 mg L−1; chemical oxygen demand, 305 ± 35 mg L−1; total organic carbon, 94.93 ± 45.46 mg L−1; total nitrogen, 295 ± 226 mg L−1; ammoniacal nitrogen, 146 ± 75 mg L−1.

Published
2021
Full Text
View/download PDF

2. Novel extremely acidic lipases produced from Bacillus species using oil substrates

Author

M. Jothieswari, B. Prasad Rao, P. Saranya, H. Sukanya Kumari, and Ganesan Sekaran

Subjects
Microorganism, Bioengineering, Bacillus, Bacillus subtilis, Palm Oil, Applied Microbiology and Biotechnology, chemistry.chemical_compound, Fish Oils, Bacterial Proteins, Plant Oils, Lipase, Chromatography, biology, Bacillus pumilus, Extraction (chemistry), Temperature, Maltose, Hydrogen-Ion Concentration, biology.organism_classification, Fish oil, chemistry, Biochemistry, Fermentation, biology.protein, Biotechnology
Abstract

The extremely acidophilic microorganisms Bacillus pumilus and Bacillus subtilis were isolated from soil collected from the commercial edible oil and fish oil extraction industry. Optimization of conditions for acidic lipase production from B. pumilus and B. subtilis using palm oil and fish oil, respectively, was carried out using response surface methodology. The extremely acidic lipases, thermo-tolerant acidic lipase (TAL) and acidic lipase (AL), were produced by B. pumilus and B. subtilis, respectively. The optimum conditions for B. pumilus obtaining the maximum activity (1,100 U/mL) of TAL were fermentation time, 96 h; pH, 1; temperature, 50 °C; concentration of palm oil, 50 g/L. After purification, a 7.1-fold purity of lipase with specific activity of 5,173 U/mg protein was obtained. The molecular weight of the TAL was 55 kDa. The AL from B. subtilis activity was 214 U/mL at a fermentation time of 72 h; pH, 1; temperature, 35 °C; concentration of fish oil, 30 g/L; maltose concentration, 10 g/L. After purification, an 11.4-fold purity of lipase with specific activity of 2,189 U/mg protein was obtained. The molecular weight of the extremely acidic lipase was 22 kDa. The functional groups of lipases were determined by Fourier transform-infrared (FT-IR) spectroscopy.

Published
2013

3. An innovative approach to minimize excess sludge production in sewage treatment using integrated bioreactors.

Author

Mannacharaju M, Natarajan P, Villalan AK, Jothieswari M, Somasundaram S, and Ganesan S

Subjects
Anaerobiosis, Biological Oxygen Demand Analysis, Sewage chemistry, Wastewater, Bioreactors, Waste Disposal, Fluid methods
Abstract

The present investigation deals with an application of integrated sequential oxic and anoxic bioreactor (SOABR) and fluidized immobilized cell carbon oxidation (FICCO) reactor for the treatment of domestic wastewater with minimum sludge generation. The performance of integrated SOABR-FICCO system was evaluated on treating the domestic wastewater at hydraulic retention time (HRT) of 3hr and 6hr for 120days at organic loading rate (OLR) of 191±31mg/(L·hr). The influent wastewater was characterized by chemical oxygen demand (COD) 573±93mg/L; biochemical oxygen demand (BOD 5 ) 197±35mg/L and total suspended solids (TSS) 450±136mg/L. The integrated SOABR-FICCO reactors have established a significant removal of COD by 94%±1%, BOD 5 by 95%±0.6% and TSS by 95%±4% with treated domestic wastewater characteristics COD 33±5mg/L; BOD 5 9±0.8mg/L and TSS 17±9mg/L under continuous mode of operation for 120days. The mass of dry sludge generated from SOABR-FICCO system was 22.9g/m 3 . The sludge volume index of sludge formed in the SOABR reactor was 32mL/g and in FICCO reactor it was 46mL/g. The sludge formed in SOABR and FICCO reactor was characterized by TGA, DSC and SEM analysis. Overall, the results demonstrated that the integrated SOABR-FICCO reactors substantially removed the pollution parameters from domestic wastewater with minimum sludge production., (Copyright © 2017. Published by Elsevier B.V.)

Published
2018
Full Text
View/download PDF

4. Novel extremely acidic lipases produced from Bacillus species using oil substrates.

Author

Saranya P, Kumari HS, Jothieswari M, Rao BP, and Sekaran G

Subjects
Bacillus isolation & purification, Bacillus subtilis enzymology, Bacterial Proteins chemistry, Bacterial Proteins isolation & purification, Fermentation, Hydrogen-Ion Concentration, Lipase chemistry, Lipase isolation & purification, Palm Oil, Temperature, Bacillus enzymology, Bacterial Proteins metabolism, Fish Oils metabolism, Lipase metabolism, Plant Oils metabolism
Abstract

The extremely acidophilic microorganisms Bacillus pumilus and Bacillus subtilis were isolated from soil collected from the commercial edible oil and fish oil extraction industry. Optimization of conditions for acidic lipase production from B. pumilus and B. subtilis using palm oil and fish oil, respectively, was carried out using response surface methodology. The extremely acidic lipases, thermo-tolerant acidic lipase (TAL) and acidic lipase (AL), were produced by B. pumilus and B. subtilis, respectively. The optimum conditions for B. pumilus obtaining the maximum activity (1,100 U/mL) of TAL were fermentation time, 96 h; pH, 1; temperature, 50 °C; concentration of palm oil, 50 g/L. After purification, a 7.1-fold purity of lipase with specific activity of 5,173 U/mg protein was obtained. The molecular weight of the TAL was 55 kDa. The AL from B. subtilis activity was 214 U/mL at a fermentation time of 72 h; pH, 1; temperature, 35 °C; concentration of fish oil, 30 g/L; maltose concentration, 10 g/L. After purification, an 11.4-fold purity of lipase with specific activity of 2,189 U/mg protein was obtained. The molecular weight of the extremely acidic lipase was 22 kDa. The functional groups of lipases were determined by Fourier transform-infrared (FT-IR) spectroscopy.

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results