I would like to ask the experts: what is the qualified water treatment after sewage treatment?
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Since our factory does not have any requirements regarding wastewater discharge, the water treated after sewage treatment is used to water the lawns on the premises, and its quality meets the standards for urban non-potable water. But the problem now is that the land within the factory has a poor capacity to retain water, and the amount of treated fresh water available is quite large; as a result, the water used for watering plants seeps out of the factory easily. Now we want to build an evaporator by ourselves, in the form of a steam coil + tank. I was wondering if it’s possible to do this, and if there are any other solutions. Thank you.
The distilled water produced by our MVR evaporation is discharged to the municipal sewage treatment plant. In the environmental impact assessment as well, all of the feed water is reused
You mean to evaporate the water into steam and release it into the atmosphere, right? It depends on whether local environmental regulations allow such discharge; I don’t recommend installing equipment for this purpose. As you mentioned, this method results in high steam consumption and significant waste of energy. Of course, it doesn’t matter if there is waste heat available to use
Evaporation is not recommended. It is recommended to reuse part of it and install small equipment.
This approach is feasible, but it’s wasteful; one could try using the adjusted water in the boiler.
This post was last edited by The wise are enlightened on 2020-3-6 at 12:31. The cost of the evaporation treatment process is too high. Suggestions: 1. Adopt reclaimed water for use as boiler water and for heat exchange purposes ； 2. Water for flushing toilets ； 3. It is supplied to nearby factories for reuse of reclaimed water, such as large water consumers like ready-mix concrete plants, thermal power plants, and paper mills ； 4. Finally, atomized sprayers (fog guns) can be used for dust suppression in sanitation purposes as well as for irrigation in landscaping.
In this case, the industrial wastewater discharge standards have been met, but the required discharge volume is insufficient.
Use the waste heat to raise the temperature to 30+ or 40+ degrees; it can even be sold to commercial concrete mixing plants. Additionally, construction sites in the surrounding area are also major water consumers, such as highways and high-speed railways.
There are no external discharge indicators, but the large volume of wastewater indicates that a greater amount of water is being introduced from outside the factory. It is recommended to examine the possibility of using treated water at various water intake points, treating it to meet the relevant reuse standards. It not only solves the drainage problem but also saves a large amount of water resources. Unless the process generates a large amount of water, there is no reason for excess water to appear.
Utilize it in descending order of concentration gradient to reduce the use of fresh water.