Hey frnd...☺✌✅✔❤
plz solve the 6th question....
❤✅✔✌☺
Attachments:
Answers
Answered by
1
Explanation:
Semi-solids such as faeces that settle down during wastewater treatment are called sludge. This sludge is removed using a scraper and then transferred to a tank where it is decomposed by anaerobic bacteria to produce biogas.
Answered by
1
Explanation:
Untreated human excretions are a health hazard. It causes pollution of soil and water including the underground water. Thus, it contaminates the sources of water from which people collect water for drinking and household purposes. When this contaminated water is used for drinking, it can cause diseases such as cholera, typhoid, hepatitis, dysentery, etc., which may even lead to death.
Similar questions