Select the colloidal material in domestic sewage

how many of the following impurities is/are in the form of colloidal material in domestic sewage?

how many of the following impurities is/are in the form of colloidal material in domestic sewage?

What is domestic sewage?

Untreated domestic sewage has a low

What are the various constituents of domestic sewage ? Discuss the effects of sewage discharge on a river .