Centre for Alternative Technology

Course Search


Louise Halestrap



MSc Architecture: Advanced Environmental and Energy studies

Senior Lecturer

Thesis Supervisor

Additional Needs Coordinator




Louise has spent her career studying almost everything decomposing, from dead fish and abattoir waste, antibiotics produced in eggs, headache pills, nappies, TNT and pesticides in the soil, sewage, household waste...

She has worked in Organics Research and Development for a radical Cleanstream recycling (source separation) company- that plan to extract the 'wealth from waste' in Ceredigion. During her 7 years at CAT she lead the consultancy services on solid waste management and water treatment, conservation and recycling, managed the composting and sanitation research programmes including: live testing of home composting as a waste minimisation strategy; social factors involving householder participation in composting, ran specialist courses on Composting and Sewage Solutions and lectured to a wide range of students.

Prior to her work with CAT Louise was Director of Research for a commercial composting company and a research scientist in the large scale composting sector.

She has been Chair of Cylch (the Wales Community Recycling Network), adviser to the Composting sub-group at the National Assembly in Cardiff and the on steering group for the Powys Zero Waste.


BSc (hons) Environmental Biology, UW Aberystwyth
MPhil Microbiology of an industrial composting system, UW Aberystwyth

Teaching Activities


Research Interests

Biodegradation, waste and recycling systems, eco-refurbishment


Harper, P and Halestrap, L (2006) Lifting the Lid, an ecological approach to toilet systems CAT Publications

Roll-Pickering, A and Halestrap, L (2003) Remote toilet challenges The Scottish Mountaineer No.19

Thornton J, Halestrap L and Harper P (2003) Twenty seven years of in-situ compost toilet research in the UK Presented at the 2nd compost toilet symposium- Tampare Finland

Harper, P and Halestrap, L (1999) Harvesting rainwater Clean Slate Journal of Sustainable Living No.31

Halestrap, L (1998) The wonderful world of reedbeds Clean Slate Journal of Sustainable Living No.29

Halestrap, L (1998) Constructed reedbeds tipsheet CAT Publications

Halestrap, L (1995) A new composting system is described, a paper presented at the 7th International Symposium for Microbial ecology- Santos, Brazil