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Wastewater has several characteristics, including: Physical: Temperature, solids, color, and turbidity Chemical: pH value, dissolved oxygen concentrations, biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrogen, phosphorus, and chlorine Biological: Determined with bioassays and aquatic toxicology tests
Some other characteristics of wastewater are: Odor: Wastewater that includes sewage typically develops a strong odor. Fresh domestic sewage is almost odorless. Temperature: Due to more biological activity, wastewater will have a higher temperature. The temperature of sewage depends upon season, but is slightly higher than that of ground water. Turbidity: Due to suspended solids in wastewater, wastewater will have a higher turbidity, or cloudiness. Sewage is highly turbid. Color: The color of sewage indicates its strength and age. Fresh domestic sewage is grey, however resembling a weak solution of soap. Total solids: This is the most important physical characteristics of wastewater. The solid material is a mixture of faeces, food particles, toilet paper, grease, oil, soap, salts, metals, detergents, sand and grit.
Environmental engineering ensures that impurities are removed from water. Topics include: Physical Characteristics of Waste Water, Chemical Characteristics of Waste Water, Biological Characteristics of Waste Water, Oxygen Demand, Population Equivalent and Relative Stability.
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