Question about wastewater temperature
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Requirements for controlling the temperature of wastewater discharged into the oily wastewater system ( ). A. Not more than 50°C B. Less than 40°C C. Less than 70°C. Which option should be chosen? Please help me analyze it.
In wastewater systems, it is generally acceptable to have inlet water at temperatures not exceeding 50°C.
Wastewater needs to be sent to wastewater treatment plants, which generally use the activated sludge method. There is an optimal temperature for activated sludge, which is 35–50 degrees; if the temperature rises, the efficiency of removing COD decreases.
If the temperature of a system is high, exceeding 50 degrees. So how can the temperature of the wastewater discharged be kept below 50 degrees?
Safety: The discharge temperature is determined based on the oil content in the wastewater； Process requirements: If a BAF unit for subsequent biochemical treatment is available, the activated sludge has specific temperature requirements.
One method is to mix it with other low-temperature wastewater (below 50°C) before sending it to the wastewater treatment plant. If not, natural cooling or forced cooling (cooling) must be carried out.
I agree with the opinion from the 6th floor; if the oily wastewater contains components with a low flash point, great care must be taken when discharging other types of wastewater. From the perspective of wastewater treatment processes, there should be no major issues; before biochemical treatment, the wastewater usually passes through a regulating tank, where its conditions can be adjusted to an appropriate level.