The sewer in the hotel kitchen is full of oil. How to solve it?

1. Wash the ground with 4-5% hydrochloric acid. The method is similar to primer painting, and it can be scraped with a knife. You can push it a few times where the oil is particularly heavy. In this process, a large number of bubbles will appear on the ground. It is normal that hydrochloric acid will corrode oily cement. According to the number of bubbles, it can be painted again (to prevent more bubbles), but it can't be more than twice at most. The preparation method of hydrochloric acid is to pour it into a bucket of water about 15 kg. In this process, we must be safe and ventilated. If hydrochloric acid spills on your body, rinse it with plenty of water immediately, and don't wipe it with a cloth.

2. Wash the floor with alkali. Commercial caustic soda (chemical name: sodium hydroxide) is about 1kg, and water is 20 kg. Scrape the floor once to neutralize the hydrochloric acid on the floor. In this process, the amount of alkali washing can be slightly larger than that of acid washing.