You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is For removal of bacteria - and explain in detail?
Slow sand filters are for effective in removal of bacteria. Slow sand filters remove about 99.9- 99.99%.Rapid sand filters remove 98-99% bacterias. Slow sand filters occupy less area,operation is less skilled. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 714.