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 Strength of sewage is - and explain in detail?
Sewage is waste water from community,containing solid and liquid excreta derived from houses ,street, yards. The strength of sewage is indicated by A)biochemical oxygen demand B)chemical oxygen demand C)suspended solids Amount of suspended solids in domestic sewage varies from 100 -500 p.p.m.(mg/L) If the amount is 100 mg/L- weak If amount is 500 mg/L- strong. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 763