DESIGN, CONSTRUCTION AND TESTING OF A LOW FLUSH TOILET

Abstract

The objective of this project was to design, construct and test a low flush toilet. Toilets consume a lot of water in flushing away waste. This is especially true in urban areas where flush toilets are most common. Water scarcity is a major world issue and this project aims to design a toilet that will significantly reduce the amount of water consumed in flushing toilets. By definition, a low flush toilet is one which uses very little water to flush and they are becoming increasingly popular due to the water crisis in the world today.

The design process followed a systematic procedure. First, information was gathered about the requirements for the toilet being designed. This was mainly based on the objectives of the study and also from publications and websites. Armed with this data, various concepts were developed through brainstorming. The AHP process was employed to choose the best concept. After this a detailed design of the selected concept was developed. AutoCAD drawings of the same were provided as well. The next step in the process was to construct the prototype and to test it. This was done in the University of Nairobi workshops and tested as well.

The prototype showed the working principle of the design. The design aims to save on water by reducing the number of times the toilet needs to be flushed. This is done by having two compartments in the toilet separated by a flap that can be moved. The main compartment can be used for both solid and liquid waste and flushed afterwards. The secondary compartment is used only for liquid waste and does not need to be flushed after each use. When the toilet is flushed, both compartments of the toilet are cleaned which caters for sanitation and containing the odour.

This design has major implications for the water scarcity problem being faced in the world today and especially for Africa which is the most affected. Toilets consume the largest percentage of water used for domestic purposes. Reducing the amount of water consumed by toilets will avail more water for other uses and also avail water to more people. Hence the need for toilets which are more efficient.