CSIR-Central Leather Research Institute
Dr.C. Lajapathi Rai
Sr. Principal Scientist
Academic Qualifications
    MS (Engg),. Ph.D
Contact Details
Dr.C. Lajapathi Rai
Sr. Principal Scientist
Head, Pilot plant
Chemical & Biological Pilot plants, Chemical Engineering
CSIR-Central Leather Research Institute
Adyar, Chennai – 600 020
e-mail: clrai@clri.res.in, clrai@hotmail.com,
Phone:91 44 24437181


Qualification
 

B.E (1989), in Mechanical Engineering from A.C. College of Engineering &Technology, Karaikudi

M.S (1994) in Technological operations from BITS, Pilani

Ph.D (2008), Interdisciplinary (Engg. & Industrial chemistry) from Alagappa University, Karaikudi

Area of research interests
 
  • Microbial fuel cell (MFC) for wastewater treatment and bio-energy with excess sludge biomass reduction
  • Wet sludge mechanical disintegration to accelerate aerobic/anaerobic digestion.
  • Wastewater Treatment through mechanical devices
  • Mechanical pretreatment strategies
Qualification
 

B.E (1989), in Mechanical Engineering from A.C. College of Engineering &Technology, Karaikudi

M.S (1994) in Technological operations from BITS, Pilani

Ph.D (2008), Interdisciplinary (Engg. & Industrial chemistry) from Alagappa University, Karaikudi

Area of research interests
 
  • Microbial fuel cell (MFC) for wastewater treatment and bio-energy with excess sludge biomass reduction
  • Wet sludge mechanical disintegration to accelerate aerobic/anaerobic digestion.
  • Wastewater Treatment through mechanical devices
  • Mechanical pretreatment strategies
Topic of Ph.D Thesis
 
  • Influence of mechanical disintegration on the microbial growth of sewage sludge

List of selected Publications in National and International Journals

  1. Chockalingam Lajapathi Rai*, G   Struenkmann, J Mueller and P. G. Rao., Microbial Growth Reduction in Sewage Sludge by Stirred Ball Mill Disintegration and Estimation by Respirometry,  J Chem Technol Biot., 2008, 83, p 269- 78
  2. C. Lajapathi Rai* and P. G. Rao, Influence of sludge disintegration by high pressure homogenizer on microbial growth in sewage sludge: an approach for excess sludge reduction, Clean Techn Environ  Policy., 2009, 11(4), p 437- 46
  3. C. L. Rai*, M. surianarayanan, A. sivasamy and F. Chandrasekaran, Pollution prevention by salt free preservation of raw goatskins through stepwise drying, Int  J Environ  Eng., 2009, 1(3),   p 295- 05
  4. S. Inbasekaran and C. Lajapathi Rai, Development of prototype microbial fuel cell (MFC) with special effect on voltage regulation and treating wastewater, J  Instrum Soc Ind., 2011, 41 (1), p 66-7
  5. Rames C. Panda, C. Lajapathi Rai, V Sivakumar, A B Mandal, Odour Removal in Leather Tannery, Adv Chem Eng Sci., 2012, 2, p 199- 03, doi:10.4236/aces.2012.22024
  6. C. Lajapathi Rai*, Madhumitha Raghav, M Surianarayanan and V Sreenivas, Kinetic modelling on CI acid blue-113 dye degradation by acoustic and hydrodynamic  cavitations Int  J Environ  Eng.,  2013, 5( 2),  p 208- 27
  7. Chockalingam Lajapathi Rai*, Arumugam Sivasamy and Subramani  Rekha, Ultrasonic sludge disintegration in the presence of iron (II) as catalyst, Int. J. Env and Waste Manage, 12(1), 2013,p 65- 76
  8. D. Murugan, C. L. Rai* and M. Sivarajan, Moisture Desorption Characteristics of Raw Sheep and Goat Skins : A Tool for Eco-friendly Method of Preservation, J Am Leath Chem  As., 2013, 108, p 32- 40
  9. Sivarajan Meenatchisundaram , Murugan Devaraj , Chockalingam Lajapathi Rai* , Kathiravan Mathur Nadarajan, An integrated approach for enhanced textile dye degradation by pre-treatment combined biodegradation,  Clean Techn Environ  Policy., 2014, 16 (3), p 501-511
  10. S. O. Mathew, B. Dinesh Kumar, R. Saranya, A. Sivasamy, C. Lajapathi Rai, D. Murugan, Preparation, Characterization and efficacy studies of thin layer nanocrystalline semiconductor photocatalyst on the oxidation of organic molecule under visible light irradiation, Int  J  Sci Eng Res.,  5 (5), 2014, p 247- 253
  11. R. Priyadarshini, L. Vaishnavi , D. Murugan , M. Sivarajan, A. Sivasamy, P. Saravanan, N. Balasubramanian, C. Lajapathi Rai*, Kinetic studies on anaerobic co-digestion of ultrasonic disintegrated feed and biomass and its effect substantiated by Microcalorimetry, Int J Environ Sci  Technol., 2014, DOI: 10.1007/s13762-014-0688-7
  12. P.Divyalakshmi, D.Murugan, M.Sivarajan, P.Saravanan, C.Lajapathi Rai*, Influence of mechanical disintegration on the microbial growth of aerobic sludge biomass: A comparative study of ultrasonic and shear gap homogenizers by oxygen up take measurements, Eco toxicol Environ, 2015, 121, p 180-185
  13. P. Divyalakshmi, D. Murugan, M. Sivarajan, A. Sivasamy, P. Saravanan, C. Lajapathi Rai*, In situ disruption approach on aerobic sludge biomass for excess sludge reduction in tannery effluent treatment plant, Chem  Eng J.,  2015, 276, p 130–136
  14. P. Divyalakshmi, D. Murugan, M. Sivarajan, A. Sivasamy, P. Saravanan, C. L. Rai*, Optimization and biokinetic studies on pretreatment of sludge for enhancing biogas production, Int. J. Environ. Sci. Technol., 2015, 14, p 813-822
  15. Palanisamy Divyalakshmi, Devaraj Murugan, Chockalingam Lajapathi Rai*, Influence of diligent disintegration on anaerobic biomass and performance of microbial fuel cell, Biotechnol. Lett., 2017, 39, p 1883-1888
  16. Palanisamy Divyalakshmi,  Devaraj Murugan, Meenatchisundaram Sivarajan, Arumugam Sivasamy,  Palanivel Saravanan, Chockalingam Lajapathi Rai*, Effect of ultrasonic pretreatment on secondary sludge and anaerobic biomass to enhance biogas production, J. Mater. Cycles Waste., 2018, 20, p 481-488
  17. Ramya V, Murugan D, Lajapathi Rai C, Sivasamy A, Activated carbon (prepared from secondary sludge biomass) supported semiconductor znic oxide nanocomposite photocatalyst for reduction of Cr (VI) under visible irradiation. J. Environ. Chem. Eng., 2018, https://doi.org/10.1016/j.jece.2018.08.055.

 

Awards
  • Awarded DAAD (Long term- fellowship) to do Ph.D in Technical University Braunschweig (Institute for mechanical biological process) presently Institute for Mechanical Biotechnology, Germany. 2001-2003.
  • Undertaken scientific investigation in the European commission project “Ways of innovation for the reduction of excess sludge (WIRES)”.