1. Invited lectures on “Municipal solid waste management in India” for AICTE sponsored QIP short term course on ‘Role of Environmental Geotechnology in Waste Management’ 2-6 November 2010, Department of Civil Engineering, Indian Institute of Technology Guwahati, India.
  2. Invited lectures on “Municipal solid waste management in India” on 28 Oct. 2011, Guwahati regional Centre, Indian Institute of Chemical Engineers at Indian Institute of Technology Guwahati, India.
  3. Invited lecture on “Ganga-A holy river of India” for AICTE sponsored QIP short term course on ‘Large River Management: Hydraulics, Hydrology and Ecology’ 16-21 January 2012, Department of Civil Engineering, Indian Institute of Technology Guwahati, India.
  4. Invited lecture on “Physical, chemical and biological characteristics of solid waste” for Rajasthan Urban Infrastructure Development Program (RUIDP) sponsored short term training program on ‘Solid Waste Management’ 24-26 August 2012, Department of Civil Engineering, Malaviya national Institute of Technology, Jaipur, India.
  5. Invited lecture on “Collection and transportation of solid waste” for Rajasthan Urban Infrastructure Development Program (RUIDP) sponsored short term training program on ‘Solid Waste Management’ 24-26 August 2012, Department of Civil Engineering, Malaviya national Institute of Technology, Jaipur, India.
  6. Invited lecture on “Composting of organic waste” for Rajasthan Urban Infrastructure Development Program (RUIDP) sponsored short term training program on ‘Solid Waste Management’ 24-26 August 2012, Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, India.
  7. Invited speaker on “Decentralized composting of institutional wastes” for “Identification of Issues for Sustainable Built-Environment (“Sustain UBE”) through Symposium of Indo-German Expert” 29-31 October 2012, Department of Civil Engineering, Indian Institute of Technology Delhi, India.
  8. Invited lecture on ““Decentralized composting of institutional organic wastes” for CPCB sponsored Training course on “Green Chemistry and Clean Technology” 26-28 November 2012, Centre for Environment, Indian Institute of Technology Guwahati, India.
  9. Invited lecture on “Route to waste utilization” for Ministry of Environment and Forests sponsored training programme on “Energy Technologies & Waste Utilization” for the Forest Ranger Trainees of Central Academy for State Forest Service, 21-22 February 2013, organized by Centre for Energy, Indian Institute of Technology Guwahati, India.
  10. Invited speaker on “Characteristics of solid waste generated from guwahati city and feasibility solutions for its management” for workshop on 'Challenges of Urbanisation' with focus on Solid Waste Management and specific issues facing the eight North-eastern states. This workshop was organized by the Indian Council for Research on International Economic Relations (ICRIER) in Guwahati on April 29 and 30, 2013 as part of its programme on Urbanisation supported by Ministry of Urban Development, Government of India.
  11. Invited speaker on “Evolution of solid waste management” for AICTE sponsored Training course on “Biotechniques for Pollution Control and Resource Recovery” 1-5 July 2013, Centre for The Environment, Indian Institute of Technology Guwahati, India.
  12. Invited speaker on “Bio-compost production from institutional waste” for AICTE sponsored Training course on “Biotechniques for Pollution Control and Resource Recovery” 1-5 July 2013, Centre for The Environment, Indian Institute of Technology Guwahati, India.
  13. Invited speaker on “Management of municipal solid waste” for celebration of 46th Engineers day on theme ‘Frugal Engineering-Achieving More with Fewer Resources’, 11 September, 2013, Senior Engineers' Forum of Greater Guwahati, Chandmari, Guwahati, India.
  14. Invited speaker on “High Rate Composting of Institutional Wastes” for ‘First Symposium on Advances in Sustainable Polymers’, 10-11 January 2014, Indian Institute of Technology Guwahati, India.
  15. Invited speaker on “Rapid Composting of Organic Wastes” for ‘National Symposium on Sustanable Chemistry: Frontiers & Challenges (SCFC-2014)’ 27 Feb. - 1 March 2014, North-Eastern Hill University, Shillong, India.
  16. Invited speaker on “High rate Composting of Organic Fraction of Municipal Solid Waste” for ‘National Conference on Sustainable Development of Environmental System (NCOSDOES-2014)’ 20-21 June, Centre for the Environment, Indian institute of Technology Guwahati, Guwahati, India.
  17. Invited speaker on “Solid Waste Management & Disposal Strategies” for ‘A Seminar on Impact of Unplanned Construction Activities in Urban Areas with Special Reference to Guwahati’ 1 November 2014, Department of Civil Engineering, Royal School of Engineering and Technology Guwahati.
  18. Invited speaker on “Solid Waste Management – An Integrated Approach” for QIP-STC on ‘Challenges and Recent Advances in Geotechnical Engineering Research and Practices (CAGERP)’, 9-13 March 2015, Department of Civil Engineering, IIT Guwahati.
  19. Invited speaker on “Energy from Waste” for QIP short-term course on ‘Recent Advances in Energy Research’ 23-27 March 2015, Department of Chemical Engineering, IIT Guwahati.
  20. Invited speaker on “Decentralized treatment of solid waste: Segregation & Disposal system in the context of Environmental issues” for Two days State Level Workshop on ‘Policy Framework on SLWM (Solid Liquid Waste Management)’, 29-30 June 2015, Assam Administrative Staff College, Khanapara, Guwahati.
  21. Invited speaker on “Waste to wealth: Utilizing Waste from Piggery” for Model Training Course on ‘Integrated Pig farming for Sustainability and Socioeconomic upliftment of Tribal Population of North-Eastern Region’ 5-12 Jan. 2016, ICAR-National Research Centre on Pig (ICAR), Rani, Guwahati.
  22. Invited speaker on “Solid Waste Management & ISWM” for National level Workshop on ‘Challenges of Solid Waste Management and Citizens Responsibility for Successful Management’ 22 Jan. 2016, WSSO and PHED Assam, Guwahati.
  23. Invited speaker on “Biological Treatment of Solid Waste” for QIP-STC on ‘Waste Management’, 9-14 May 2016, Department of Energy and Environment, National Institute of Technology Trichy (Tamilnadu).
  24. Invited Lecture on “Wastewater Treatment and Solid Waste Management” for BTech students, 22 May 2016, Department of Civil Engineering, National Institute of Technology Mizoram.
  25. Invited speaker on “Composting – An Resourceful Option for Waste Management” for Ministry of New and Renewable Energy (MNRE) sponsored training programme on “Training on Biogas and Vermicomposting” for the Sakarr Sewa Samiti, 3-7 October 2016, organized by Centre for Energy, Indian Institute of Technology Guwahati, India.
  26. Invited Key note speaker on “Evolution of Solid Waste Management & ISWM” for ‘Conference on Aedificatoria 2016-Reuse, Reduce and Recycle’ 20-22 October 2016, Royal School of Architecture Guwahati.
  27. Invited speaker on “Waste to Wealth: Utilizing Waste from Piggery” for DAC sponsored Model Training Course on ‘Value Addition and Post-Harvest management of Pork for Ensuring Hygienic pork Production’ 1-8 Nov. 2016, ICAR-National Research Centre on Pig (ICAR), Rani, Guwahati.
  28. Invited speaker on “Technology Options for Treatment of Solid Waste” for 3 Day National Workshop on ‘Recent Advances in Civil Engineering (RACE -2017)’ 2-3 March 2017, Department of Civil Engineering, National Institute of Technology Jamshedpur, India.
  29. Invited speaker on “Status of SWM in Guwahati/Assam and Its Impact on Water Management” for Workshop on ‘Development of New Water Supply Strategies and Vulnerability Assessment for Guwahati in relation to the Brahmaputra Watershed Management under the Climate Change Regime’ 30 March 2017, Department of Environmental Science, Tejpur University Assam.
  30. Invited speaker on “Technology, Skill Building and Market Linkage in Agribusiness” for ‘Round Table on Ease of Doing Agribusiness in Mizoram’ 22 April 2017, organized by Innovative Change Collaborative (ICCo) India, Hotel Floria, Aizawl, Mizoram, India.
  31. Invited speaker on “High Rate Composting of Biodegradable Wastes using Rotary Drum” for National Workshop on ‘Urban Environmental Management-Solution for Sustainability’ 17-18 August 2017, organized by CSIR-National Environmental Engineering Institute (NEERI), Hyderabad Zonal Centre, Uppal Road, Hyderabad.
  32. Invited speaker on “Evolution of Solid Waste Management” for ‘A Two Days Workshop on Sustainable Solid Waste Practices’ 31 Aug.-01 Sept. 2017, organized by Assam Engineering College, Guwahati.
  33. Invited speaker on “Biological Treatment of Solid Waste” for ‘A Two Days Workshop on Sustainable Solid Waste Practices’ 31 Aug.-01 Sept. 2017, organized by Assam Engineering College, Guwahati.
  34. Invited speaker on “Biological Treatment of Solid Waste” for ‘Refresher Course on Environmental Studies’ 26 Sept. 2018, organized by Guwahati University Guwahati Assam.
  35. Invited speaker on “Leachate Storage and Treatment” for Green Skill Development Programme (GSDP) Course Titled ‘Waste Management’ 25 Sept. 2018, organized by ENVIS RP Centre, NEHU, Shillong.
  36. Invited speaker on “Technology Options for Treatment of Rural Solid Waste” for TEQIP-STC on ‘Tailoring Technologies for Rural Sector: Development and Dissemination’, 29 Oct.- 2 Nov. 2018, Centre for Rural Technology, Indian Institute of Technology Guwahati, Guwahati.
  37. Invited speaker on “Biological Treatment of Biological Waste” for ‘National Conference on Waste to Energy Conversion (NCWEC-2018)’, 28-29 Dec. 2018, Department of Mechanical Engineering, National Institute of Technology Mizoram, Aizawl.
  38. Invited speaker on “Biological Treatment of Municipal Solid Waste” for ‘TEQIP-III Sponsored One Day Invited Expert Talk, 5 Jan., Department of Civil Engineering, National Institute of Technology Manipur, Imphal.
  39. Invited speaker on “Solid Waste Management in India – Challenges and Opportunities” for ‘National Conference on Biotechnology and Environment for Sustainable Development’, 29-30 March 2019, Dr. B. Lal Institute of Biotechnology Jaipur.
  40. Invited speaker on “Water Quality Indexing” for TEQIP-STC on ‘Environmental Systems Modeling and Design’, 1-5 July 2019, Department of Civil Engineering National Institute of Technology (VNIT) Nagpur, Nagpur.
  41. Invited keynote speaker on “Comparative study of different pretreatment methods and associated kinetics of accelerated methane production from rice straw” for ‘International Conference on Solid Waste (ICSW 2019)’, 13-16 Nov. 2019, Hangzhou, China.
  42. Invited speaker on “Solid Waste Management – Challenges and Opportunities” for Faculty development program on ‘Research and Development in Civil Engineering’ 18-22 Nov. 2019, Girijananda Chowdhury Institute of Management and Technology (GIMT), Guwahati.
  43. Invited speaker on “Biological Treatment of Various Organic Waste in India” for Fourth International Conference on ‘Advances in Civil and Structural Engineering (ICACSE – 2020)’, 28-30 May 2020, Government College of Engineering, Karad, India.
  44. Invited speaker on “Decentralized Treatment of Biological Solid Waste” for Short Term Training Program on ‘Waste Management Techniques with Special Attention to COVID-19 Waste’, 22-26 June 2020, S. V. National Institute of Technology, Surat.
  45. Invited speaker on “Decentralised Treatment of Biological Waste: A solution for solid waste management in India” for ‘Webinar on Recent trends in Structural and Environmental Engineering’, 08-11 July 2020, Girijananda Chowdhury Institute of Management and Technology, Guwahati, Assam.
  46. Invited speaker on “Solid Waste management in India” for one week FDP on ‘Sustainable Environment: An Engineering Perspective (SEEP: 2020)’, 013-18 July 2020, Assam Engineering College, Guwahati, Assam.
  47. Invited speaker on “Decentralized Treatment of Biodegradable Municipal Solid Wastes (MSW)” for TEQIP-III Sponsored Webinar on ‘Research and Practices in Civil Engineering (RPCE-2020)’, 03-07 August 2020, Indira Gandhi Institute of Technology Sarang, Odisha.
  48. Invited speaker on “Biomethanation: A Sustainable Approach towards Conversion of Green Waste into Clean Energy” for One week FDP on ‘Energy and Environment: Conversion/Generation, Storage and Efficient Utilization’, 24-28 August 2020, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh.
  49. Invited speaker on “Recycling of Organic Materials for Preparation of Fired Bricks” for One week short term training program (STTP) on ‘Sustainable Construction Engineering: Research and Practices’ 19-23 October 2020, Visvesvaraya National Institute of Technology (VNIT) Nagpur, Maharashtra.
  50. Invited speaker on “Biomethanation: A Sustainable Approach towards Management of Bio-degradable Municipal Solid Waste” for One week online short-term training programme (STTP) on ‘Solid Waste - A Hidden Treasure in Reality’ 23-28 November 2020, Vachana Pitamaha Dr P.G. Halakatti College of Engineering & Technology, Vijayapur, Karnataka.
  51. Invited speaker on “Biomethanation: A Sustainable Approach towards Management of Bio-degradable MSW” for Online workshop cum FDP programme on ‘Technologies for Waste to Energy & Resources (eFDP-TWER-2020)’ 9-13 December, 2020, National Institute of Technology, Rourkela, Odisha.
  52. Invited speaker on “Decentralized Treatment of Municipal Solid Wastes” for TEQIP short term course on ‘Recent Advances in Geotechnical and Geoenvironmental Engineering’, 17-23 December 2020, Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati.
  53. Invited speaker on “Solid Waste Landfilling- Issues and Challenges” for TEQIP short term course on ‘Recent Advances in Geotechnical and Geoenvironmental Engineering’, 17-23 December 2020, Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati.
  54. Invited speaker on “Decentralized Treatment of MSW” for TEQUIP sponsored webinar on ‘Waste Management and Sustainable Development’ 22-24 December 2020, Department of Civil Engineering, Jorhat Institute of Science and Technology (JIST), Jorhat, Assam.
  55. Invited speaker on “Decentralized Treatment of Municipal Solid Wastes (MSW)” for TEQIP faculty development program on ‘Recent Trends in Civil Engineering’, 18-22 January 2021, Department of Civil Engineering, Institute of Engineering and Technology (IET), Lucknow.
  56. Invited speaker on “Recycling of Organic Materials for Preparation of Fired Bricks” for TEQIP-III Sponsored Webinar on ‘Challenges and Opportunities in Civil Engineering Construction (COCEC-2021)’, 25-29 January 2021, Indira Gandhi Institute of Technology Sarang, Odisha.
  57. Invited speaker on “Biomethanation: A Sustainable Approach towards Management of Bio-Degradable Municipal Solid Waste” for TEQIP short term course on ‘Importance of Environmental Engineering and Climate Change’, 12-16 January 2021, Department of Civil Engineering, National Institute of Technology, Meghalaya.
  58. Invited speaker on “Decentralized Treatment of Municipal Solid Wastes (MSW)” for ‘International Conference on Emerging Technologies in Water, Waste Water Treatment and Solid Waste Management (ETWM-2021)’, 18-20 March 2021, KLS Gogte Institute of Technology, Belagavi, Karnataka.
  59. Invited speaker on “Decentralized Treatment of Biodegradable Solid Wastes” for ‘International Conference on Water and Environment (ICWE-2021)’, 22-23 March 2021, MA National Institute of Technology (MANIT), Bhopal.
  60. Invited speaker on “Decentralized treatment of various organic wastes in India” for ‘International Conference on Biotechnology for Sustainable Agriculture, Environment and Health (BASEH-2021)’, 4-8 April 2021, Birla Institute of Scientific Research, Jaipur, Rajasthan, India.
  61. Invited speaker on “Decentralized Treatment of Biodegradable Municipal Solid Wastes” for ‘International Conference on Sustainable Biowaste management 2021’, 12-15 April 2021, Hong Kong Baptist University, Hong Kong SAR, China.
  62. Invited speaker on “Centralized Vs. Decentralized Treatment of Solid Waste” for ‘World Environment Day’, 5 June 2021, Indian Institute of Science, Bangalore, India.
  63. Invited speaker on “Biomethanation of Biodegradable Municipal Solid Waste” for AICTE sponsored short term course on ‘Advancements in Sustainable Waste Management’, 24-30 June 2021, Indian Institute of Technology Bhubaneswar, India.