How big is the impact of pig farming pollution on the environment

Pig farms on the environment and the harm of people is still relatively large, mainly site selection and the corresponding environmental protection measures to keep up.

Now generally new large-scale pig farms require a distance of more than 2km from the centralized residential areas, traffic arteries, etc., pig farms on the environment is mainly harmful to:

Exhaust gas, that is, the pig farms of the stench of the odor, especially in the summer, the impact on the regional ambient air is relatively large, especially if it is in the upwind direction of the residential areas, it is bitter.

Wastewater: hog farm flushing wastewater and pig urine, etc., now generally take the dry manure process, and some take free flushing process. But the pigsty flushing or waste water, flushing wastewater in the main pollutants are COD, ammonia nitrogen, if directly discharged into the water body, it will cause eutrophication of the water body, affecting water quality and aquatic ecological environment. Therefore, now generally require wastewater to take zero discharge, i.e., ecological reuse after treatment (such as fish ponds, etc.).

Pig manure, etc., can generally be sold as fertilizer.

Nowadays, large-scale farms are also supported by feed processing, which also generates dust and noise.