Why is the water quality of the influent water to water treatment plants generally higher in winter and lower in summer throughout the year?
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The water quality of the wastewater entering the treatment plant is usually higher in winter and lower in summer throughout the year. Why is that? Is it because there is more precipitation in summer? Or do you take more baths in the summer?
Reasons for higher water consumption in summer: 1. Precipitation is generally higher in summer than in winter； 2. In summer, the temperatures are high, so more water is used for daily activities such as bathing compared to winter ； 3. The frequency of production and daily activities is higher in summer compared to winter.
There is plenty of rainfall in summer. Summer temperatures are high, so people take baths frequently
:) In short, water consumption is high in summer. Whether it’s for production or daily use, water usage is greater during summer than at other times – due to the heat, sunlight, convection, precipitation, people’s need to take baths and change clothes, and the evaporation from rivers, among other factors. . .
Evaporation rates vary depending on the temperature in winter and summer; when the temperature is high, more dissolved gases in the wastewater evaporate, resulting in a decrease in the concentration of the wastewater.
During the wet and dry seasons, there is a significant difference between full flow and throttled flow
The key factor is still heavy precipitation, and high water demand in summer is also one of the influencing factors. Spring and summer are the rainy seasons, during which rainwater accounts for a larger proportion in domestic wastewater; therefore, the COD level is lower in summer. It is also possible that in summer, the high temperatures give microorganisms in wastewater a stronger capacity for metabolism, while in winter, the low temperatures suppress their metabolic activity. Or in summer, the weather is hot and rainy, so people eat lighter meals. Winter is very cold, with little rain, and people eat greasy food.