manthiramkarthikr@ssn.edu.in Extn: 567 Contact Information Dr. Manthiram Karthik Ravichandran Anna University Supervisor Recognition: 4410003 Assistant Professor Department of Civil Engineering Dr. Manthiram Karthik Civil - SSN Telephone - SSN Research Centre
Introduction
Research
Center for Speech Technology

Dr. P. Vijayalakshmi, a distinguished academic and researcher, is a Professor and Head of the Department of Electronics and Communication Engineering. She has 28 years of experience in teaching and research, with four years dedicated exclusively to speech signal processing.

She is a Senior Member of IEEE (since 2016) and a member of the IEEE Signal Processing Society. Additionally, she is a Fellow of the Institution of Electronics and Telecommunication Engineers (IETE), reflecting her extensive contributions to the field.

Dr. Vijayalakshmi earned her Bachelor of Engineering (B.E.) degree in Electronics and Communication Engineering with First Class and Distinction from Bharathidasan University.

She has published over 120 research publications in refereed international journals and in proceedings of international conferences. As a principal investigator she is currently involved in MeiTy funded project titled “Speech Assistive Technologies” – NLTM- BHASHINI.and a DST IMPRINT IIC project on “Development of Speech-to-speech translation systems for Hindi, Tamil and English” and “Development of bidirectional Hand-gesture recognition system” funded by DST-TIDE. As co-PI she is currently involved in MeiTy, TVA, DST-CRG funded projects. Further she has completed several other projects as PI and Co-PI that are funded by MeiTy, New Delhi, AICTE, DST-TIDE, and Tamil Virtual Academy, a Government of Tamil Nadu organization, and two projects funded by SSN Trust as well. She is a recognized supervisor of Anna University and currently guiding Five fulltime Ph.D scholars in the field of Speech Technology.

Her areas of research include Speech Signal Processing, Speech Enabled Assistive technology, Speech synthesis, and Speech recognition.

She was instrumental in establishing the “Speech and language technologies lab” to carry out research in the field of speech technology. (website link – speech.ssn.edu.in)

  • Vijayalakshmi, N. Narenraju and V. Aiswarya, “Hidden Markov model-based sign language-to-speech conversion system in Tamil” Patent no. 530321.
  • Vijayalakshmi, T. Nagarajan and T.A. Mariya Celin – attended final hearing for a patent titled “A Speech-input Speech-output Communication Aid for Speakers with Cerebral Palsy” in the Indian Patent office in July 2022. (Application number: 201941031287)

Book chapters

  • Vijayalakshmi, T. Nagarajan, “Assessment and intelligibility modification for dysarthric speakers”, Chapter 3 – Voice Technologies for Reconstruction and Enhancement, De Gruyter Series in Speech Technology and Text Mining in Medicine and Healthcare, pp. 67 – 94, Feb. 2020.
  • Vijayalakshmi, T. A. Mariya Celin, T. Nagarajan, “Selective pole modification-based technique for the analysis and detection of hypernasality”, Chapter 2 – Signal and Acoustic Modelling for Speech and Communication Disorders, De Gruyter Series in Speech Technology and Text Mining in Medicine and Healthcare, pp. 33 – 68, Dec. 2018.

Anna University Supervisor Recognition: 4410003 Extn: 567 sumethar@ssn.edu.in Department of Civil Engineering Contact Information Dr. Manthiram Karthik Ravichandran Assistant Professor Dr. Manthiram Karthik Civil - SSN
  • Ph.D. in Environmental Engineering, Indian Institute of Technology Madras, Chennai, (2017 – 2022)
  • M.E in Environmental Engineering, Thiagarajar College of Engineering, Anna University (Chennai) (2015 – 2017).
  • B.E in Civil Engineering, Dr. Mahalingam College of Engineering and Technology, Anna University (Chennai) (2011 - 2015).
  • Jan 2024 – Till date, Assistant Professor, Department of Civil Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai.
  • Jul 2023 – Dec 2023, Consultant – Research and Development, CDD India, Bengaluru.
  • Jul 2022 – Jul 2023, Project Officer (Post-doctoral work), Indian Institute of Technology Madras, Chennai.

(Anna University Supervisor Recognition Ref. No.: 4410003)

  • Water and Wastewater treatment
  • Nature-based treatment systems
  • Emerging Contaminants 
  • Treatment Process Design including treatability studies.
  • Process Simulation and Modeling
  • Onsite sanitation systems 
  • Life Cycle Assessment
  • Environmental auditing
  • Advancing Nature-Based Solutions: Understanding the attenuation of Per- and polyfluoroalkyl substances (PFAS) in plants, Research grant from SSN Trust, Rs 3.9 Lakhs 2024-2026 (PI - Ongoing).
  • Blue-Green Infrastructure for Stormwater Management and Water Reuse, Shiv Nadar Foundation, Rs 39.8 Lakhs (Co-PI – Ongoing).
  • Developing an Efficient Greywater Treatment System Using Constructed Wetlands Coupled with an Adsorbent System, Research grant from SSN Trust, Rs 18000, 2024-2025 (Student Project, Mentor/Guide – Ongoing).
  • Certification on Universal Human Values -1 by AICTE, New Delhi.
  • Certifications on “Faecal Sludge Management”, “Shit Flow Diagram”, “Understanding Environmental Law for improving environmental management” and “Water Audit”.
  • Participated in “Faecal Sludge Management-4” with the sponsorship of UNESCO-IHE.
  • Qualified in UGC-NET for Assistant Professor (Jan 2017 - Environmental Sciences)
  • Qualified in GATE 2017 with a 95.08 Percentile (Score 502).
  • Awarded Teaching and Research Assistantship from Mar 2016 to Mar 2017 under Technical Education Quality Improvement Programme of the Government of India (TEQIP II) scheme.
  • Received supporting fund for Master`s dissertation work under TEQIP II Scheme.
  • Secured Rank 2 in B.E., Civil Engineering and awarded Silver Medal.

Journal Publication

  • Prabakar, P., Thampan, D., Karthika, S., Ravichandran, M.K., Subramanian, A., Nagarajane, A.M., Hussaina, R., Sivagami, K. (2025). A State of Art Review on Large scale Desalination Technologies and Brine Management. Environmental Science: Water Research & Technology, https://doi.org/10.1039/D4EW00662C
  • Biswas, P., Vellanki, B. P., Ravichandran, M. K., Kazmi, A. A., & Philip, L. (2024). Widespread Surveillance of Emerging Contaminants in the Yamuna River Basin: Evaluation of Surface Water, Sediments, Groundwater, and Aquatic Plants. ACS ES&T Water. https://doi.org/10.1021/acsestwater.3c00627
  • Ravichandran, M.K., Philip, L. (2022) “Fate of carbamazepine and its effect on physiological characteristics of wetland plant species in the hydroponics system.” Science of the Total Environment, 846, 157337. https://doi.org/10.1016/j.scitotenv.2022.157337.
  • Ravichandran, M.K., Philip, L. (2022). “Assessment of the contribution of various constructed wetland components for the removal of pharmaceutically active compounds.” Journal of Environmental Chemical Engineering (10), 107835. https://doi.org/10.1016/j.jece.2022.107835.
  • Ravichandran, M.K., Yoganathan, S., Philip, L. (2021). “Removal and risk assessment of pharmaceuticals and personal care products in a decentralized greywater treatment system serving an Indian rural community.” Journal of Environmental Chemical Engineering (9), 106832. https://doi.org/10.1016/j.jece.2021.106832.
  • Renganathan, J., Insamam Ul Huq, Ramakrishnan, K., Ravichandran, M. K., & Philip, L. (2021). “Spatio-temporal distribution of pharmaceutically active compounds in the river Cauvery and its tributaries, South India.” Science of the Total Environment (800), 149340. https://doi.org/10.1016/j.scitotenv.2021.149340.
  • Ravichandran, M.K., Philip, L. (2021). “Insight into the uptake, fate and toxic effects of pharmaceutical compounds in two wetland plant species through hydroponics studies.” Chemical Engineering Journal (426), 131078. https://doi.org/10.1016/j.cej.2021.131078.
  • Manthiram Karthik, R., Philip, L. (2021). “Sorption of pharmaceutical compounds and nutrients by various porous low-cost adsorbents.” Journal of Environmental Chemical Engineering (9), 104916. https://doi.org/10.1016/j.jece.2020.104916.

Conference Publication:

  • Karki, B.K., Ravichandran, M. K., & Philip, L. (2024) “Constructed Wetlands for Wastewater Treatment in India: Insights from Recent Development”, in the Roorkee Water Conclave (RWC) - 2024, 3rd – 6th March 2024, IIT Roorkee, India.
  • Ravichandran, M. K., Anantha Moorthy, Siddanagouda Patil, Rohini Pradeep (2024), “Evaluating the performance of two-staged constructed wetland system for sustainable wastewater treatment in India”, in the 56th IWWA Annual convention, 19th – 21st January 2024, Coimbatore, India.
  • Ravichandran, M. K., & Philip, L. (2023) “Performance of pilot-scale hybrid constructed wetland for greywater treatment”, in the 13th IWA International Conference on Water Reclamation and Reuse, 15-19th January 2023, Chennai, India.
  • Ravichandran, M. K., & Philip, L. (2022) “Attenuation and fate of pharmaceutically active compounds in the baffled constructed wetland treating greywater,” in the First International Conference on Circular Economy for Sustainable Water Management (SuWaM 2022), 23rd – 25th March 2022, Indian Institute of Technology Madras, Chennai, India and awarded “Best presentation” in the session “Emerging contaminants”.
  • Ravichandran, M. K., & Philip, L. (2021) “Occurrence and fate of antimicrobial agents in a hybrid flow constructed wetland treating greywater”, in the virtual conference of AQUA≈360: Water for All - Emerging Issues and Innovations, 31st August 2021 – 2nd September 2021, University of Exeter, United Kingdom.
  • Renganathan, J., Insamam Ul Huq, Ramakrishnan, K., Ravichandran, M. K., & Philip, L. (2021) “Spatio-temporal distribution of pharmaceutically active compounds in the river Cauvery and its tributaries, South India,” in the virtual conference of AQUA≈360: Water for All - Emerging Issues and Innovations, 31st August 2021 – 2nd September 2021, University of Exeter, United Kingdom.
  • Ravichandran, M. K., & Philip, L. (2020) “Decentralized greywater treatment using baffled constructed wetland,” in the 13th International Conference on Challenges in Environmental Science and Engineering (CESE-2020), 7-8th November 2020 (Online).
  • Ravichandran, M. K., & Philip, L. (2020) “Occurrence, fate and risk assessment of PPCPs in wastewater from the rural community,” in the 2nd International Conference on Wastewater Technologies and Environmental Treatment (ICWTET-2020), 11th September 2020 (Online) and won “Best video presentation award”.
  • Ravichandran, M. K., & Ravi Sankar, V. (2017) “Process simulation model for nutrient removal in wastewater treatment” at National Conference on Innovations in Materials, mechanics and Processes for sustainable development, 17th April 2017 at Coimbatore Institute of Technology, Coimbatore.
  • Ravi Sankar V., Charles Chelliah J., Kiruthika Eswari V., Manthiram Karthik R., Nivethidha R. & Pradeep Pandiyan D. (2016) “An Approach towards energy neutral wastewater treatment system – A case study” at National conference on “Energy and Environment” on 16th September 2016, organized by IIT-Madras and CODISSIA, Coimbatore.
  • Ravichandran, M. K., Abraham, A. P., Anantha Moorthy U., Pradeep R. (2025) "Optimizing Nutrient Removal through Integration of Microbial Fuel Cells with Constructed Wetlands for Wastewater Purification". Integrated Bio-electrochemical Constructed Wetland System for future sustainable wastewater treatment. Edited by Manoj Kumar, Neeraj Kumar Singh, Abhilasha Singh Mathuriya. Springer Transactions in Civil and Environmental Engineering, Springer, Singapore. pp. 37-66, Scopus, ISBN: 978-981-96-2814-8; https://doi.org/10.1007/978-981-96-2814-8_2
  • Ravichandran, M. K., Ravisankar, V. (2025) Exploration of Nature-Based Technologies for Urban Pollution Challenges in Rapidly Growing Cities. EcoTech Urbanism. Edited by Venkatesh Baskaran, S.M. Renuka, R. Velkennedy. The Urban Book Series, Springer Nature. 978-3-031-83833-0.
  • Ravichandran, M. K., Thayyil, M. I., & Philip, L. (2023). Application of engineered natural treatment systems for pollution abatement. Technological Solutions for Water Sustainability: Challenges and Prospects, 145. 9781789063714. https://doi.org/10.2166/9781789063714 
  • Environmental Impact Assessment
  • Geo-Environmental Engineering
  • Green Building Design
  • Materials and Energy Science for Buildings
  • Engineering Graphics
  • Contract Laws and Regulations
  • Design Thinking and Engineering Practice Laboratory
  • Soil Mechanics Laboratory
  • Computer Aided Drawing Laboratory
  • Highway Practices Laboratory
  • Number of PhD scholars completed: Nil
  • Number of PhD scholars ongoing: Nil
  • Number of MS (Research) scholars completed: Nil.
  • Number of MS (Research) scholars ongoing: Nil
Research profile IDs

Researcher ID HHY-8139-2022
Scopus ID
ORCID ID0000-0003-4519-9212
Google Scholarhttps://scholar.google.com/citations?user=feZXRIgAAAAJ&hl=en
Anna University Centre for Research Reference Number4410003