16 - Exploitation of natural microbial communities in the treatment of sewage

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Last updated 3:27 AM on 5/20/26
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10 Terms

1
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What do solids in waste water cause?

Silting of rivers

2
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What are examples of toxic substances in waste water?

NH3 / heavy metals

3
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What is BOD used to predict?

Effect of discharging waste / determine effectiveness of purification

4
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By law, BOD must not exceed_______?

20mgL^-1

5
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What equation is occurring at anaerobic digesters?

Organic matter -> CH4 + CO2 + H2O

6
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What is the equipment for anaerobic digesters?

Incubation in sealed stirred tanks reactor at 35 degrees

7
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What are the 2 secondary treatments?

Percolating filtration treatment / activated sludge process

8
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What is formed on surface of clinker?

Biofilm of microbes

9
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Tertiary processing:

Consist of filter through sand or pumping into enclosed reed bed prior to release into rivers.

10
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Percolating filtration treatment / activated sludge process - which ones faster?

activated sludge process