“The role of environmental Life Cycle Assessment in the design of hazardous solid waste treatment processes”; H. von Blottnitz and J.G. Petrie; 11th International Conference on Solid Waste Technology and Management; Philadelphia; 1995.
“Development of a Method for the Identification of Eco-Efficient Improvements in the Industrial Networks of SMEs”, D. van Beers, B. Kothuis, H. von Blottnitz and J. Raimondo, International Conference on Industrial Ecology and Sustainability, 22-25 September 1999, Troyes, France.
“An Investigation into the Current Developmental Status of Fuel-Cell Zero Emission Vehicles and the Potential for their Introduction in the Cape Metropol”, H. von Blottnitz, National Association for Clean Air, Annual Conference, 7-8 October 1999, Cape Town.
“On the Real Costs of Waste Treatment: The Case of an Effluent Treatment Plant in the Metal Finishing Industry”, H. von Blottnitz and B. Kothuis, WasteCon 2000, Somerset West, 4-7 September 2000, vol. 2, pp. 315-322.
“Disposal of chromium(III) bearing solid wastes in landfills: How safe is it in the long run?”; K. Pillay, H. von Blottnitz and J. Petersen; WasteCon 2000, Somerset West, 4-7 September 2000, vol. 2, pp. 329-336.
“Cleaner Production as a Tool to Minimise the Volumes of Solid Waste Arising in Small and Medium Enterprises in the South African Metal Finishing Industry”; C. Jänisch, B. Kothuis and H. von Blottnitz; WasteCon 2000, Somerset West, 4-7 September 2000, vol. 2, pp. 389-398.
“Selection of Waste Management Options with the Aid of Environmental Life Cycle Assessment: The Case of Used Lubricating Oil in South Africa”; B. Rwodzi and H. von Blottnitz; WasteCon 2000, Somerset West, 4-7 September 2000, vol. 2, pp.399-408.
“HFO or Used Oil, Sulphur or Lead: Results of a Life Cycle Assessment”; H. von Blottnitz; National Association for Clean Air Annual Conference, 10-12 October 2001, Port Elizabeth.
“Bio-Ethanol As Octane Enhancing Fuel Additive In Southern Africa: An Examination Of Its “Environmental Friendliness” From A Life Cycle Perspective”, H. von Blottnitz, E. Theka and T. Botha; National Association for Clean Air Annual Conference, 23-25 October 2002, Durban.
"Green Electricity Or Fuel Ethanol? A Comparative Life Cycle Assessment of Two Energy Products from Sugarcane Bagasse"; T. Botha and H. von Blottnitz; SAIChE National Conference, Sun City, 3-5 September 2003.
“Design for Cleaner Technology in the South African Minerals Processing Industry”; S.M. Marr, H. von Blottnitz and Z. Mudondo; Book of Proceedings: Waste Management, Emissions & Recycling in the Metallurgical & Chemical Process Industries, Randburg, 18-19 March 2004; pp.1-10, 2004.
“Conversion of plant oils to methyl-ester fuels: Considerations for reactor design in commercial and small-scale production”; H. von Blottnitz, S.A. Sadat-Rezai and J. Vardy; 16th International Congress of Chemical and Process Engineering CHISA 2004, Prague, 22 - 26 August 2004
“’Life beyond the P&ID’: Engagement of 4th year Chemical Engineering Students with Business, Society and Environment”; H. von Blottnitz, International Conference on Engineering Education in Sustainable Development, Barcelona, 27-29 October 2004.
“Introducing Cleaner Production to the South African mining industry: Points of accord and of discord; P. Dama, G. Trusler, C. Jänisch, C Buckley and H. von Blottnitz; 2nd Conference on Sustainable Development in the Mining Industry; Aachen, 18-20 May 2005.
“A Life-Cycle Comparison between Processes using either Inorganic or Biological Catalysis for the Production of Biodiesel”; K.G. Harding, S.T.L. Harrison, H. von Blottnitz and J.S. Dennis; World Renewable Energy Congress, Aberdeen, 22-27 May 2005.
“A material flow analysis of wood & paper in Cape Town: is there potential to redirect flows in formal and informal sectors to foster use as a renewable resource?”; C. Nissing and H. von Blottnitz, presented at the 12th International Sustainable Development Research Conference, 6-8 April 2006, Hong Kong.
“Understanding Element Distribution during Primary Metal Production”; JL Broadhurst, JG Petrie, H von Blottnitz; Green Processing 2006, 5-7 June 2006.
“Burn, Gasify, Pyrolyse or Ferment? Making sense of the many possibilities for energy from waste in South Africa”; H. von Blottnitz*, G. Austin, C. Nissing, N. Schmalbein, L. Liphoto, N. Ncwadi, A. Gets and C. Fedorsky; WasteCon06, Somerset West, 5-8 September 2006.
“Composition and Heterogeneity of MSW from Khayelitsha”; C. Brill, C. Moerdyk, C. Nissing and H. von Blottnitz; WasteCon06, Somerset West, 5-8 September 2006.
“A Cleaner Production Assessment on the Ultra-Fine Coal Waste Generated in South Africa”; J.F. Reddick, H. von Blottnitz and B. Kothuis, South African Chemical Engineering Congress, 20-22 September 2006, Durban: SAIChE. ISBN 1 86840 616 4.
“2nd Generation Bio-Energy Technology: Thoughts about Getting the Best New Developments to Work for Africa”, H. von Blottnitz and A. Chakraborty, South African Chemical Engineering Congress, 20-22 September 2006, Durban: SAIChE. ISBN 1 86840 616 4.
“Life-Cycle Assessment of Industrial Biodiesel Production Using Inorganic or Biological Catalysts”; K.G. Harding, J.S. Dennis, H. von Blottnitz and S.T.L. Harrison; South African Chemical Engineering Congress, 20-22 September 2006, Durban: SAIChE. ISBN 1 86840 616 4.
“Minimization of Water Loss in the Mineral Processing Industry”; G. Mwakyusa, P. Musonge and H. von Blottnitz; South African Chemical Engineering Congress, 20-22 September 2006, Durban: SAIChE. ISBN 1 86840 616 4.
“An Investigation of Scale Economies for African Biogas Installations”; B. Amigun and H. von Blottnitz; South African Chemical Engineering Congress, 20-22 September 2006, Durban: SAIChE. ISBN 1 86840 616 4.
“Practical Complementary Options to Crude Oil Transport Fuels: A Global Perspective”, J.J. Botha and H. von Blottnitz; XVI International Symposium on Alcohol Fuels, Rio de Janeiro, 26-29 November 2006.
“A Preliminary Life Cycle Assessment of Combusting Low Grade Waste Paper Bricks as a Supplementary Fuel Source for Informal Microbreweries”; Petrie D, Vonk M, Hansen Y, von Blottnitz H and C Nissing; WasteCon, Durban, 6-10 October 2008, ISBN:978-0-620-40434-1.
“A Technical and Practical Evaluation of the Co-Firing of Low Grade Paper Bricks with Charcoal in Informal Microbreweries”; Petrie D, Vonk M, Hansen Y, von Blottnitz H and C Nissing: WasteCon, Durban, Durban, 6-10 October 2008, ISBN:978-0-620-40434-1.
“Comparison and application of sequential chemical extraction techniques for metal speciation in sulphidic copper tailings”; Jennifer L Broadhurst, Wisani J. Maluleke and Harro von Blottnitz; 8th International Conference on Acid Rock Drainage, 23-26 June 2009, Skelleftea, Sweden.
“A Systems Approach for the Application of Eco-Efficiency Indicators for Process Design in the Minerals Industry”, Guma, M., H von Blottnitz and J Broadhurst; 4th Sustainable Development in the Minerals Industry (SDIMI) conference, 6-9 July 2009, Gold Coast, Australia, peer-reviewed and published by the Australasian Institute of Mining and Metallurgy (AusIMM).
“Small-scale production of biodiesel from used vegetable oil: what are the quality experiences?” E. Julius and H. von Blottnitz, S.A. Chemical Engineering Congress, 20-23 September 2009, Somerset West, ISBN: 978-1-920355-21-0).
“Evaluation of the Separation Efficiency of Waste Materials at Source in the University of Cape Town’s Recycling System”; Warambwa, N., K. Wayi, A. Kasozi and H. von Blottnitz; WasteCon2010, 4-8 October 2010, Johannesburg, ISBN: 978-1-920017-49-1.
“Pre-treatment of non-recyclable paper for energy recovery by anaerobic digestion”; Melamu, R., A. Lampard, K. Schafer and H. von Blottnitz; WasteCon2010, 4-8 October 2010, Johannesburg, ISBN: 978-1-920017-49-1.
“Experimental investigation of the suitability of various organic fractions of municipal solid waste for energy recovery through biomethanation”; Munganga, G., R. Melamu, H. von Blottnitz and M. Nontangana; WasteCon2010, 4-8 October 2010, Johannesburg, ISBN: 978-1-920017-49-1.
“Using local knowledge production and systems thinking approaches in the development of an Integrated Solid Waste Management (ISWM) Plan harnessing semi-formal systems: Lessons from Nairobi, Kenya”; Kasozi, A., H. von Blottnitz, P. Ngau and N. Kahiu; WasteCon2010, 4-8 October 2010, Johannesburg, ISBN: 978-1-920017-49-1.
“Stakeholder Collaboration and Learning during the Concept Design Phase of an Urban Biogas Project”; Melamu, R., A. Boyd, H.L. Wlokas, B.C. Roden, G. Austin and H. von Blottnitz; Knowledge Collaboration & Learning for Sustainable Innovation Conference, Delft and Cape Town, 25-29 October 2010, ISBN 9789051550658.
“Conceptions of Sustainable Development Held by Chemical Engineering Graduates”; Sibanda, L., J. Case and H. von Blottnitz, Knowledge Collaboration & Learning for Sustainable Innovation Conference, Delft and Cape Town, 25-29 October 2010, ISBN 9789051550658.
