Wastewater story
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
Cleaning of waste water
3.
Process of pumping air to purify water and to help bacteria grow
4.
Harmful substances dissolved as impurities
7.
Bacteria surviving without oxygen
8.
Drain constructed under the ground is called
9.
Aerobic bacteria require oxygen to live
Down:
1.
Tank containig bacteria for decomposing the sewage is called
2.
Water borne disease
5.
Solid like faeces which settle at the bottom of tank in waste water treatment plant are called
6.
Vermicomposting is a process of decomposing human excreta by
OK