RUN-OFF WATER HARVESTING TECHNOLOGY
Katende Harambe is very keen on promoting a run-off-water harvesting technology that utilizes polythene tube gauge (1000) or tarp line, which is placed in a pit and covered with strong poles, light gauge polythene and mixed soil for maximum utilization of space. Vegetables can then be grown on top of the well tank. This technology can be used to harvest both run-off-water and rooftop water.
Water is then channeled through small pits, which are protected by bricks, lined pegs and wire mesh to eliminate the debris. This technology calls for a little expenditure, but ensures water security. Moringa seeds, wood ash and cement can then be used to purifying water for domestic use.
LOW-COST TUBULAR PLASTIC BIO-DIGESTER GAS
Biogas is a gaseous fuel produced by the fermentation of organic material such as animal manure, human excreta, kitchen waste, crop straws and leaves under airtight or anaerobic conditions, i.e. no light or oxygen. The airtight pit or container is called the “digester’, and the process of decomposition and fermentation pit, only part of the organic materials is converted into biogas, leaving behind some liquid slurry. This slurry is a very rich source of soluble nitrogen, and thus can be used as a fertilizer for field crops. It can also be used as a source of nitrogen in animal feeds.
The main constituents of biogas are methane (CH4) and carbon dioxide (CO2). Biogas burns very well when the methane content is more than 50 percent, and therefore can be used as a substitute to kerosene, charcoal and firewood for cooking and lighting. This saves times and money, and above all conserves natural resources. One cubic metre of methane gas produces 36 MJ of energy, equivalent to the energy produced by one litre of petrol.
The starch contained in cassava can be used as cement in construction of buildings. Katende Harambe carried out an extensive research on this crop cassava (Manihot Esculenta). The research concluded that 2-3kg of cassava flour can effectively mix two wheelbarrows of sand to make a potent mortar, provided you add 20litres of boiled water and three litres of cold water.
This technology can be adopted by low-income earners in building permanent houses in the rural areas, and even in towns and cities. The technology calls for personnel training on how to handle the main ingredient (cassava flour); special care should be taken so that it should not ferment or get eaten by cassava store pests (Cassava weevils). Special training should be carried out on the laying of bricks and mixing of the motor.
MAKING COMPOSITE MANURE
Home made manure (composite) is prepared from decayed garden weeds, kitchen remains, animal wastes (dung and urine) and crop residues. With the help of macro and microorganisms living in the soil, the decomposition converts the vegetation into a valuable plant food called humus. Composite manure improves soil structure and texture and texture and conserves the environment, and since it is made at home, it reduces capital intensiveness.