Physical chemical and biological parameters of wastewater
Answers
Answer:
Physical Characteristics of Wastewater
· Color - Fresh sewage is normally brown and yellowish in color but over time becomes black in color.
· Odor – Wastewater that includes sewage typically develops a strong odor.
· Temperature - Due to more biological activity, wastewater will have a higher temperature.
· Turbidity - Due to suspended solids in wastewater, wastewater will have a higher turbidity, or cloudiness.
Biological Characteristics of Wastewater
· Biochemical Oxygen Demand (BOD) - BOD is the amount of oxygen needed to stabilize organic matter using microorganisms.
· Nitrogenous Oxygen Demand (NOD) - NOD is the amount of oxygen needed to convert organic and ammonia nitrogen into nitrates by nitrifying bacteria.
· Microbial life in wastewater - Wastewater contains the following microbes:
Bacteria
Protozoa
Fungi
Viruses
Algae
Rotifers
Nematodes
· Oil and Grease - Oil and grease originate from food waste and petroleum products. The amount of oil and grease in raw wastewater varies from 10 to 109 mg/L.
It is important that those who are striving to obtain their FE certification fully understand how to regulate the biological characteristics of wastewater through appropriate treatment methods.