What is the primary purpose of centralized waste treatment facilities?

Centralized waste treatment facilities primarily serve the purpose of treating hazardous liquid wastes. These facilities are equipped with specialized systems and processes designed to handle and neutralize liquid waste that poses potential risks to human health and the environment. The treatment methods used can include physical, chemical, and biological processes aimed at making the hazardous wastes safe for disposal or reuse.

In contrast, recycling solid waste focuses on materials recovery rather than treatment, while incineration is specifically for burning waste rather than treating it to mitigate hazardous properties. Reducing landfill use is an important objective in waste management, but it encompasses a broader range of strategies beyond just the treatment of hazardous liquid wastes at centralized facilities. This shows that the primary focus of these facilities is on hazardous liquid waste management, confirming the accuracy of the selected answer.