Prof. U. N Mutwiwa

Designation: Associate Professor

PHD Biosystems and Horticultural Engineering, Hannover University, Germany

Research interests: Controlled environment, Agriculture processes engineering, Climate change and Sustainable energy

Selected Publications

  1. Mutwiwa, U. N., Tantau, H. J., Murunga, I. S., Elsner., B. V., Max, J. F. J. (2017). Effects of Near Infra Rad-Reflecting Greenhouse Roof Cover on Greenhouse Microclimate, Growth and Production of Tomatoes in Tropics. AgricEngInt: CIGR Journal 19(3): 70- 79.
  2. Ndirangu, S. N., Kanali, C. L, Mutwiwa, U. N., Kituu, G. M. (2017). The determinants of Postharvest Losses among High Moisture Content Vegetable Traders in Kenya. Journal of Postharvest Technology, 5 (2): 37-46.
  3. Ndirangu, S. N., Kanali, C. L, Mutwiwa, U. N., Kituu, G. M. (2017). A Model for Renewable Energy Based Agro-processing Technology Transfer. Journal of Sustainable Research in Engineering (in press ID 552).
  4. Kiburi, F. G., Mutwiwa, U.N., Ronoh, E.K., Chemain, N., Yegon, H. K., (2017). Evaluating the Performance of Dehumidified Solar Drier in Drying of Pumpkin slices (Cucurbita pepo). African Journal of Horticultural Sciences 11: 72-81.
  5. Mwangi, G., Mutwiwa, U. N., Kasaine, S., Schulte, B. (2017). A spanner in the works: Human elephant conflicts complicates the energy-food-Water nexus. Frontiers in Environmental Science Journal: Agroecology and Landuse 5 (69): 1-6 .
  6. Korir M. K., Mutwiwa, U. N., Kituu, G. M., Sila, D. N. (2017). Effect of near infrared reflection and evaporative cooling on quality of mangoes. Agricultural Engineering International: CIGR Journal, 19(1): 162-168.
  7. Sang, J. K., Raude, J., M., Mutwiwa, U. N., Ochieng, F., (2016). Dual Echo Sounder Bathymetric Survey for Enhanced Management of Ruiru Reservoir Kenya. Journal of Sustainable Research in Engineering (in press ID 552)
  8. Maloi, S. K., Sang, J. K., Raude, J. M., Mutwiwa, U. N., Mati, B. M., Maina, C. W. (2016). Assessment of Sedimentation Status of Ruiru Reservoir, Central Kenya. American Journal of Water Resources 4(4): 77-82.
  9. Murunga, I. S., Mbuge, O. D., Gitau, A. N., Mutwiwa, U. N., and I. N. Wekesa (2016). Isolation and characterization of methanogenic bacteria from brewery wastewater inKenya. African Journal of Biotechnology, 15(47): 2687-2697.
  10. Max, J. F. J., Schmidt, L., Mutwiwa, U. N., Kahlen, K. (2016). Effects of Shoot Pruning and Inflorescence Thinning on Plant Growth, Yield and Fruit Quality of Greenhouse Tomatoes in a Tropical Climate. Journal of Agriculture and Rural Development in the Tropics and Subtropics, 117 (1): 45-56.
  11. Onchoke, I. N., Mutwiwa, U. N., Hunja, M., Ochieng, F., (2016). Conversion of Rice Husks into an Energy Source through Gasification Technology. International Journal of Science and Research, 5(9): 1264-1268
  12. Murunga, I. S., Mbuge, O. D., Gitau, A. N., Mutwiwa, U. N., Wekesa, I. N. (2016). Characterisation of Brewery Wastewater and Evaluation of Its Potential for Biogas Production. AgricEngInt: CIGR Journal Vol. 18:No.3, 308-316.
  13. Omari, J. N., Mutwiwa, U. N., Mailutha, J. T. (2016). The current status and handling of E-waste in Kenya: A case study of Nairobi County. Journal of Sustainable Research in Engineering. 3(1): 22-28
  14. Kamwere, M., Kanali, C. L., Mutwiwa, U. N., Kituu, G. M. (2015). Thin layer drying Characteristics of Stinging Nettle (Urticadioica L) in Solar tunnel Dryer. International Journal of Engineering Research and Technology, ISSN 2278-0181, 4(2).
  15. Maina, J. J., Mutwiwa, U. N., Kituu, G. M., Githiru, M. (2015). Evaluation of Greenhouse Gas Emissions along the Smallholder Coffee Supply Chains in Kenya. Journal of Sustainable Research in Engineering, 2 (4): 111-120.
  16. Ngugi, H. N., Home, P. G., Mutwiwa, U. N. (2014). Impacts of Water and Sanitation activities on the environment in the upper Mara basin, Civil and Environmental Research, 6(1): 9-16.
  17. Muriuki W. C., Mutwiwa, U. N., Home, P. G. (2014). Potential of Banana Peels (Musa Sapientum Biomass) in Adsorption of Hexavalent Chromium: Equilibrium and Kinetic Study. International Water Technology Journal 4 (4).
  18. Muriuki W. C., Mutwiwa, U. N., Home, P. G., Kilonzo, F. N. (2014). Adsorption of Chromium (VI) from Aqeous Solution by Accacia Tree (Accacia tortilis) Charcoal. Journal of Sustainable Research in Engineering, 1 (3): 30-38.
  19. Korir, M. K., Mutwiwa, U. N., Kituu, G. M., Sila, D. N. (2014). Simulation of saturation efficiency and cooling capacity of an unloaded near infrared reflecting charcoal cooler for on-farm storage of mango fruits. Journal of Sustainable Research in Engineering, 1(2): 34-39.
  20. Ruben, R., Hoebink, P., Ngutu, H. M., Mutwiwa, U. N., Njuguna, S., Elbers, W., Kempen, L., Rijsbergen, B., (2014). The Impact of Coffee Certification on Smallholder Farmers in Kenya. In The Impact of Coffee Certification on Smallholder Farmers in Kenya, Uganda and Ethiopia, Centre for International Development Issues Nijmegen (CIDIN), Radboud University Nijmegen, The Netherlands.
  21. Max, J. F. J., Schurr, U., Tantau, H. J., Mutwiwa, U. N., Hofmann, T., Ulbrich, A. (2013):Greenhouse Cover Technology. Horticultural Reviews
  22. Kilonzo, F. N., Mutwiwa, U. N., Waweru, S. (2012). Evaluating the use of constructed wetlands in the treatment of tannery wastewater. Kenya Science, Technology and Innovation Journal, Volume 3: 16-22.
  23. Mugo, J. K., Mutwiwa, U. N., Miriti, L., (2011). Mapping of Existing Gender Disaggregated Data and Methodologies in Agriculture and Rural Development in Kenya. JICA, Kenya Office and Agricultural Sector Coordination Unit, Kenya.
  24. Max, J. F. F., Horst, W. J., Mutwiwa, U. N., and H. J. Tantau. 2009. Effects of greenhouse cooling method on growth, fruit yield and quality of tomato (Solanum lycopersicum L.) in a tropical climate. Scientia Horticulturae 122, 179–186.
  25. Mutwiwa, U. N., Tantau, H. J. 2009. Insect Screens for Integrated Plant Protection in Greenhouses. Acta Horticulturae 719.
  26. Mutwiwa, U. N., Elsner, B., Tantau, H. J., Max, J. F. J. (2008). Cooling Naturally Ventilated Greenhouses in the Tropics by Near-Infra Red Reflection. Acta Horticulturae 801
  27. Mutwiwa, U. N., Tantau, H. J. Elsner, B., Max, J. F. J. (2008). Effects of NIR-reflection Greenhouse Cooling on Blossom-end Rot and Fruit Cracking. African Journal of Horticultural Science 1: 33-43.
  28. Mutwiwa, U. N., Tantau, H. J., Salokhe V. M. (2007). Greenhouses in the Humid Tropics: Problems and Solutions. SOLARIS 2007. 1: 238-247.
  29. Mutwiwa, U. N., Tantau, H. J., Salokhe, V. M. (2006). Response of tomato plants to natural ventilation and evaporative cooling methods. Acta Horticulturae 719: 447-454.
  30. Mutwiwa, U. N., Borgemeister, C., Elsner, B., Tantau, H. J. (2005a.) Effects of UV absorbing plastic films on greenhouse whitefly (Homoptera: Aleyrodidae). Journal of Economic Entomology 98 (4): 1221-1228.
  31. Mutwiwa, U. N., Tantau, H. J. (2005b). Suitability of a UV lamp for trapping the greenhouse whitefly Trialeurodes vaporariorum Westwood (Hom: Aleyrodidae). Agricultural Engineering International: the CIGR Ejournal Volume VII, Manuscript BC 05 004.

Books and/or Book Chapters

  1. Mutwiwa, U. N. (2011). Cooling Greenhouses in the Tropics, Lampert Publishing, Germany. ISBN-10: 384659363X, ISBN-13: 978-3846593639.
  2. Mutwiwa, U. N, Mwangi, E. K. (2011). Kenya: Country Status Report, Section 2; Stateof-the-Art Report on ‘Sustainable Rainwater Harvesting and Ground Water Recharge in Developing Countries’; (Ed) Tanuja N. Ariyananda, A.R. Shivakumar and Vasant Takalkar; Centre for Science & Technology of the Non-Aligned and Other Developing Countries (NAM S&T Centre); ISBN- 978-81-7035-770-4; 2011; pp 172-79.
  3. Ngure, J., Githiru, M., Mutwiwa, U. N. (2011). Land-Use Conflicts in Kenya: Drivers and Potential Solutions, in Urbanisation, land use, land degradation and Environment. (Ed)Ozturk M.; Mermut A. R and A. Celik. Daya Publishing House, India. ISBN-10: 817035711X, ISBN-13: 978-8170357117; pp 114-127.

Doctor of Philosophy
Completed

  1. Ms. Sylvia I. Murunga. Thesis Title: Isolation and Characterisation of Methanogenic Bacteria for Optimal Biogas Production from Brewery Wastewater, University of Nairobi (Graduated in August 2017).

On going

  1. Eng. Samuel N. Njuguna. Thesis Title: Optimisation of an Integrated Solar and Biomass powered Drier: A technical and Economic Consideration (On going).
  2. Bonface Godwin Mukabane. Thesis Title: Potential of Biodiesel Production from Locally Available Autotrophic Microalgae (On going).
  3. Joseph Mbothu. Thesis Title: Use of Life Cycle Analysis Approach to Evaluate the Sustainability of Ethanol Production from Molasses and Sweet Sorghum (On going).
  4. Solomon Mulindi. Thesis title: Comparative evaluation of the performance of pot charcoal heater and composite solar heater in a passive brooder system on regulating temperatures for poultry chicks’ development. (Case Study of Indigenous Chicken Chicks) (On going).

Master of Science
Completed

  1. Hannah G. Ngugi (2011-2014). Thesis Title: Impacts of Water and Sanitation Activities on the Environment in the Upper Mara basin (Graduated in 2014).
  2. Meshack K. Korir. Thesis Title: Modelling, Development and Testing of a Charcoal Cooler for on-Farm Storage of Mangoes (Graduated in 2015).
  3. Cecilia W. Muriuki (2011-2015). Thesis Title: Potential of Banana Peels, Pumice and Charcoal to Adsorb Chromium Metal from Tannery Waste Water (Graduated in 2016).
  4. Michael M. Kamwere. Thesis Title: Thin Layer Drying Characteristics of High Moisture Content Vegetables in an Integrated Renewable Energy Drying System (Graduated in 2017).
  5. Joan J. Maina. Thesis Title: Evaluation of Greenhouse Gas Emissions from Small-scale Coffee Producers in Kiambu (Kenya) Using the Cool Farm Tool (Graduated in 2017).

Ongoing

  1. Justus N. Omari. Thesis Title: Investigation of the Current Status of Electronic Waste and their Generation and Management: Case Study of Nairobi and Nyamira Counties (On going)
  2. Ishmail N. Onchoke. Thesis Title: The Potential and Characterisation of Rice Husks as an Alternative Energy Source; Case Study of Mwea Irrigation Scheme (On going).

Scientific Research Projects

  1. Topic: Development of an Appropriate Greenhouse Technology for Sustainable Vegetable Production for Climate Change Mitigation and Socio-Economic Development in Kenya
    Researcher(s):U.N. Mutwiwa, and J. M. Wesonga
    Financing Institution: JICA Africa-ai-Japan
    Status: On-going
  2. Topic: Human Elephant Conflicts: Deterrents, ecological correlates, and climate smart agriculture practices
    Researcher(s): U. N. Mutwiwa, G. Mwangi and B. Schulte,
    Financing Institution: Earthwatch Institute, USA
    Status: On-going
  3. Topic: Energy Efficient Rural Food Processing Utilising Renewable Energy to
    Improve Rural Livelihoods
    Researcher(s): Kanali, C. L., Mutwiwa, U. N., Kituu, G. N., Ronoh, E. K., Ndirangu, S.N., Mung’atu, J., Kamwere, M.
    Financing Institution: DFID
    Status: Completed
  4. Topic: Design, Performance Testing and Commercialization of Greenhouse Solar Dryer with Forced Convection Air System.
    Researcher(s):Eng. S. N. Njuguna U.N. Mutwiwa, and Eng. Dr. G. M. Kituu, C. L. Kanali, M. Kamwere
    Financing Institution: National Council for Science & Technology
    Status: On-going
  5. Topic: Assessment of Sedimentation Status of Ruiru Reservoir, Central Kenya
    Researcher(s): J. K. Sang, J. M. Raude, U. N. Mutwiwa
    Financing Institution: Jomo Kenyatta University of Agriculture and Technology
    Status: On-going
  6. Topic: Exploration of Inland and Marine Microalgae for Biofuel Production.
    Researcher(s): U. N. Mutwiwa, S. N. Ondimu, J. Odalo, J. Bosire, L. Wangai,
    Financing Institution: National Council for Science and Technology, Kenya
    Status: On-going
  7. Topic: Reservoir Sedimentation Measurement and Assessment in Kenya Pilot Project
    Researcher(s): J. Sang, J.M. Gathenya, P.G. Home, U.N. Mutwiwa, J Dunbar, P. Allen, Moriasi, Steiner
    Financing Institution: United States Department for Agriculture, Jomo Kenyatta University of Agriculture and Technology
    Status: Completed
  8. Topic: Improvement in Mango Production and Value-Addition: towards Increased Marketing, Food Sustainability and Security
    Researcher(s): D. Sila, U. N. Mutwiwa, J.W. Kaluli, F. Wanzala
    Financing Institution: Jomo Kenyatta University of Agriculture and Technology
    Status: Completed
  9. Topic: Evaluation of the Impacts of WASH Activities on the Environment in the Upper Mara Basin
    Researcher(s): H. N. Ngugi, P. G. Home and U. N. Mutwiwa
    Financing Institution: USAID Mara Basin Water Scholars Program, Florida International University and Global Water for Sustainability Program
    Status: Completed
  10. Topic: Development of system for producer gas powered CI engine
    Researchers: I. N. Onchoke, U. N. Mutwiwa, A.H.O Anyangu
    Financing Institution: National Council for Science and Technology, Kenya
    Status: On-going
  11. Topic: Design, Development and Testing of a Charcoal Cooler for Mangoes
    Researchers: M. K. Korir, U. N. Mutwiwa, G. M. Kituu
    Financing Institution:National Council for Science and Technology, Kenya
    Status: Completed
  12. Topic: Investigation of the Current Status of Electronic Waste and their Generation and Management: Case Study of Nairobi and Nyamira Counties
    Researchers: J. Omari, J. T. Mailutha, U. N. Mutwiwa
    Financing organisation: National Council for Science and Technology, Kenya
    Status: On-going
  13. Topic: Evaluating the Performance of Constructed Wetland to Treat Tannery Wastewater
    Researchers: F. N. Kilonzo, U. N. Mutwiwa, J. Waweru
    Financing Institution: National Council for Science and Technology, Kenya
    Status: Completed

Workshops and Conferences

  1. Mutwiwa, U. N. (2018). Development of a Lowcost Greenhouse for the tropics. Sustainable Research and Innovation, May, 2018, at African Institute for Capacity Development, Juja.
  2. Mukabane, B.G., Gathitu, B. B., Mutwiwa, U. N., Njogu, P., Ondimu, S. N., (2017). Microalgae Cultivation Systems for Biodiesel Production. Institution of Engineers of Kenya Conference, held from 10th – 12th May 2017.
  3. Mukabane, B.G., Gathitu, B. B., Mutwiwa, U. N., Njogu, P., Ondimu, S. N., (2017). Microalgae Cultivation Systems for Biodiesel Production. Proceedings of the Sustainable Research and Innovation Conference,JKUAT Main Campus, Kenya held from 3rd – 5th May 2017.
  4. Korir, M. K., Mutwiwa, U. N., Kituu, G. M., Sila, D. N. (2016). Effect of Evaporative Cooling and Near-Infrared Reflection Cooling on the Quality of Mangoes. 16th Workshop on Sustainable Horticultural Production in the Tropics, held from 28th November to 2nd December 2016 at Chuka University, Kenya.
  5. Kiburi, F. G., Mutwiwa, U. N., Naomi, C., Haron, Y. K. (2016). Evaluating the Performance of Dehumidified Solar Drier in Drying of Pumpkin slices (Cucurbita pepo). The 11th JKUAT Scientific, Technological and Industrialization Conference 10th – 11th November, 2016.
  6. Mutwiwa, U. N., Korir, M. K., Kituu, G. M., Sila, D. N. (2016). Effect of Evaporative and Near-infrared Reflection Cooling on the Quality of Mangoes. The 11th JKUAT Scientific, Technological and Industrialization Conference 10th – 11th November, 2016.
  7. Njuguna, S. N., Mutwiwa, U. N., Kanali, C. L., Kituu, G. M. (2016). A Model for Renewable Energy Based Agro-processing Technology Transfer. Sustainable Research and Innovation, held from May 4th -6th, 2016, at Kenya School of Monetary Studies, Nairobi, Kenya.
  8. Sang, J. K., Raude, J., M., Mutwiwa, U. N., Ochieng, F., (2016). Dual Echo Sounder Bathymetric Survey for Enhanced Management of Ruiru Reservoir Kenya. African Water Association Congress May 2016
  9. Korir, M. K., Mutwiwa, U. N., Kituu, G. M., Sila, D. N. (2014). Assessment of postharvest challenges facing mangoes at Upper Athi River Basin, Kenya. 8th JKUAT Scientific and Technological Conference, November 2014.
  10. Korir, M. K., Mutwiwa, U. N., Kituu, G. M., Sila, D. N. (2014). Development of a computer model simulation for predicting the performance of a near infrared reflecting charcoal cooler for on farm storage of mangoes. Sustainable, Research and Innovation (SRI) Conference (pp.178-181), ISSN 2079-6226.
  11. Muriuki C. W., Mutwiwa, U.N., Home P. G., (2014). Adsorption of Hexavalent Chromium from Aqueous Solution by Pumice: Equilibrium and Kinetic Study, 2014 Annual International Sustainable Research and Innovation (SRI) Conference at AICAD, Juja, Kenya.
  12. Mutwiwa, U. N., Mwangi, H. M., Mbalo, D., (2013). Technical Challenges Hindering Accessibility of Clean Water Among the Residents of Mathare and Mukuru Informal Settlements in Nairobi, Kenya. Proceedings of the 2013 Mechanical Engineering Annual Conference on Sustainable Research and Innovation, 23rd to 26th April, 2013.
  13. Ngunzi, V. K., Mugucia, S. W., Kituu, G. M., Mutwiwa, U. N. (2013). Simulation Model for Predict Drying in the Automated Grain Dryer. Proceedings of the 2013 JKUAT Scientific Technological and Industrialization Conference – pages 676-685
  14. Ngugi, H. N., Home, P. G., and Mutwiwa, U. N. (2013). Impacts of WASH (Activities on the Environment in the Upper Mara Basin, presented at 8th JKUAT scientific, Technological and Industrialization conference, Juja Kenya.
  15. Ngugi, H. N., Home, P. G., Mutwiwa, U. N. (2013): Evaluation of the Impacts of WASH (Water, Sanitation and Hygiene) Activities on the Environment in the Upper Mara using the WEAP model presented at the 1st Pan African Conference of science, computing and Technology (PACT 2013) Lusaka, Zambia (ASCU).
  16. Omari, J., Mutwiwa, U. N., Mailutha, J. T. (2013). Environmental and Health Effects of E-Waste. Proceedings of the 2013 Mechanical Engineering Annual Conference on Sustainable Research and Innovation, 23rd to 26th April, 2013.
  17. Toili, M.E.M., Rimberia, F. K., Nyende, A. B., Mutwiwa U. N., Kaluli J. W., Sila D. (2012). Assessing morphological diversity of mango germplasm from the Upper Athi River (UAR) region of Eastern Kenya. Proceedings of the 7th JKUAT scientific, technological and industrialization conference, Jomo Kenyatta University of Agriculture and Technology, Juja-Kenya, 15th-16th November, 2012.
  18. Mutwiwa, U. N., Tantau, H. J. and Max J.F. J. (2012). Evaluation of Gas Exchange System for Online Monitoring of Plant Response, JKUAT Scientific Conference December, 2012.
  19. Onchoke, I., Mutwiwa, U. N and Murage, H. (2012). Gasifying Rice Husks as an Energy Resource. 3rd Kenya Rice Researchers Forum 28th June 2012, at KARI Headquarters, Nairobi, Kenya.
  20. Mutwiwa, U. N. (2011). Agricultural Engineering Training in Kenya, 3rd December 2011. Pwani University College
  21. Mutwiwa, U. N, Mwangi, E. K. (2009). Rainwater Harvesting and Ground Water Recharge in Kenya, 17-20 August, Pune, India.
  22. Mutwiwa, U. N., Tantau, H. J. (2008a). Insect Screens for Intergrated Plant Protection in Greenhouses. International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild winter Climate, Antalya, Turkey, 6-11, April 2008.
  23. Mutwiwa, U. N., (2008b). Solar Drying of Agricultural Products using Greenhouses. The German Alumni Food Network (GAFN) Workshop on “Drying Methods and Postharvest Technologies” Chiangmai, Thailand, 25 February, 2008 to 5 March, 2008.
  24. Mutwiwa, U. N., Tantau, H. J., Salokhe, V. M., Schmidt, U. (2007a). Phytomonitoring Transpiration of Tomatoes Grown in Naturally Ventilated Greenhouses in the HumidTropics. 5th International Symposium on Irrigation of Horticultural Crops, Mildura, Australia. 28 August – 2 September 2006.
  25. Mutwiwa, U. N., Tantau, H. J., Elsner, B., Max, J. F. J. (2007b). Cooling Naturally Ventilated Greenhouses in the Tropics by Near-Infra Red Reflection. GREENSYS2007, Naples, Italy.
  26. Mutwiwa, U. N., Tantau, H. J., Max, J. F. J. (2007c). Effect of Greenhouse Cooling Method on the Growth and Yield of Tomato in the Tropics. Proceedings of Deutscher Tropentag 2007, Witzenhausen, Germany.
    27. Mutwiwa, U. N. (2007d). The Effect of UV-Transmission on Insect Pests. German Association of Plastics in Agriculture Spring Conference (GKL fruhjahrstagung) 2nd to 3rd May, 2007), Heidelberg, Germany.
  27. Mutwiwa, U. N., Tantau, H. J. (2005a): Greenhouse whitefly control using UV absorbing plastics. Landtechnik 4, S. 233.

 

For more publications, Prof. U. N. Mutwiwa’s Google Scholar Profile

 

Contact Information

Office Location: AEB 16

Email:umutwiwa@jkuat.ac.ke