Question 1: Where a main sewerage system has not been provided, sewage may be collected from homes by pipes into ________ or cesspits, where it may be treated or collected in vehicles and taken for treatment or disposal.
Question 2: ________ is the process of removing the contaminants from sewage to produce liquid and solid ( sludge) suitable for discharge to the environment or for reuse.
Question 3: ________, also known as storm flow or overland flow, is that portion of precipitation that runs rapidly over the ground surface to a defined channel.
Question 4: Also known as ________ flows, sewage is the used water supply of the community.
Question 5: Their flows and strengths are usually more varied, intense, and concentrated than those of ________ sewage.
Question 6: Depending on their origin, wastewater can be classed as sanitary, commercial, industrial,agricultural or ________.