Does the water used for washing dishes and tea in the cafeteria need to be treated before being discharged?
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Does the water used for washing dishes and tea in the cafeteria need to be treated before being discharged, or can it be discharged directly? Is water treatment necessary?
It is not discharged directly; it is generally mixed with other domestic wastewater for biochemical treatment.
It must be treated before being discharged~ It can be treated separately (for large volumes) or mixed with other domestic wastewater for treatment~ Biological treatment processes can be used.