Urban swill refers to the leftovers discarded by people in restaurants, restaurants, schools, canteens and other places, excluding leftovers such as vegetables and fish discarded before cooking and the mixture of leftovers and water discarded by people at home.
Besides being a vegetarian, pigs eat carrion and even feces. Swill is just a common food for pigs. Moreover, as long as the swill is not too special, it can usually meet the daily nutritional needs of pigs.
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Pig farmers who feed pigs with swill are usually free-range farmers living around towns, and most of them do not have the conditions for animal epidemic prevention. Once the pathogenic microorganisms contained in swill invade, they can cause diseases. These sick pigs can easily lead to the spread of animal diseases through the acquisition and sale of illegal pig dealers.
Of course, putting an end to "swill pigs" is not simply throwing all swill into the sewer and washing it away. Doing so will also cause pollution and waste. The correct way is to treat the swill harmlessly and find a good way out for the kitchen waste.
After harmless treatment, kitchen waste can not only become high-quality organic fertilizer, but also be used as feed, which not only solves the problem of "swill pig", but also meets the needs of developing circular economy. But as far as the whole country is concerned, the treatment rate of kitchen waste is still very low. Therefore, a lot of educational guidance and standardized management are needed in this respect.