Cleaning sewage with bug power

摘要

You might think a constant supply of fresh air is essential for a sewage treatment plant, but some bacteria cannot stand the stuff. These bugs could be the key to cleaning waste water so efficiently that the process could generate power rather than consume it.rnIn conventional sewage plants, bacteria convert solid waste into methane but produce liquid waste containing ammonium, which must be removed by other bacteria that require a constant supply of oxygen from electric pumps.