Can pollution control facilities be left idle?
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Due to the change in the process, a new air flotation tank with a larger capacity has been added. The existing air flotation tank is now idle because its processing capacity is insufficient and some of its equipment cannot be repaired. Is that acceptable?
It’s a bit similar: my phone broke, so I bought a new one. Can I do without the old one? Of course you can, but you need to be prepared for environmental considerations; in some areas, it’s necessary to revise the environmental impact assessment. For specific details, you can ask the environmental protection agency
Absolutely. On the one hand, it is necessary to submit reports and undergo inspections to the regulatory authorities in order to meet the requirements for the operation of the facilities ； On the other hand, keep proper records of the process changes internally; it is advisable to remove unused equipment and devices, as well as to improve management procedures and records.
May I ask, in a flotation tank used for scum removal, how high is the scum layer or oil layer above the surface of the clear water? How deep does the scraper go into the liquid surface? Are there standards?
The scraper cannot be inserted into the water, as this will cause stirring and lead to the scum mixing back into the water. The scraper can generally start scraping the scum at a distance of 1–2 centimeters above the water surface; there is no fixed standard, and the timing for starting this scraping operation can be determined based on the specific conditions on site. For example, scraping can begin when the thickness of the scum is around 3–4 centimeters.