Practical Answers
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Serpentine Solar Water Heating Design Manual
The Serpentine is a solar thermal collector developed as part of a low cost water heating system by the AIDG for households in Xela, Guatemala.
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The Permanent Magnet Generator (PMG)
This guide describes how to make a small permanent magnet generator for wind turbines.
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Best Practice in Solid Waste Management
This guide demonstrates successful waste management in Nepal.
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Construction Manual for Earthquake-Resistant Houses Built of Earth
The solutions proposed in this manual concentrate on low-cost single-story houses, built from earth in rural areas of earthquake-prone zones. They are based on research projects carried out at the Forschungslabor für Experimentelles Bauen (Building Research Laboratory) of the University of Kassel,...
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Natural Pesticides - Chilli pepper
The insecticidal properties of chilli pepper are highest in the ripe fruit especially in the skin and seed. Chillis act as a stomach poison, antifeedant and repellent to a number of pests.
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Evaluation of the Hoffman Kiln Technology
Evaluation of Hoffmann kiln technology for a low cost solid waste incinerator.
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Utilization of Cow-dung in Brickmaking
Addition of certain organic materials improves the plasticity of clay making it more workable.
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Slow Sand-Filtration Water Treatment Plants
Slow sand-filtration systems are a technically viable water treatment solution.
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Water Hyacinth
This document suggests solutions for the control of water hyacinth - biological, physical and chemical - and discusses possible practical applications of the plant.
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Composting in the Tropics
Organic matter is often piled up in the compound but left unmanaged. This will produce compost but the materials will take a long time to decompose and nutrients will be lost.