Portrait of scientist John Pirt,of the Depart- ment of Life Sciences at King's College London,UK,who has discovered a sewage bacteria ("London caldoactive bacteria"),and invented a bacterial sewage disposal system. The bacteria species was isolated from horse dung; it destroys sludge at 80 degrees centigrade. The sewage disposal system has four stages: stage 1 & 3 at 80C use "caldoactive" bacteria; stage 2 & 4 at 37C use a "cold" bacteria to consume byproducts of previous stages. The end product is a clear effluent; mineral/metal waste can be recycled. Some 4kW of electricity can be generated per cubic metre of sludge. The system proves cheap to run and can be pollution free | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Stammers, Sinclair |
Bildgröße: | 3543 px × 5144 px |
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