How to deal with hotel feces in the mountains?

Septic tank.

A septic tank is a device for treating, filtering, and settling feces. The principle is that the solidified material decomposes at the bottom of the pool, and the hydrated material in the upper layer flows into the pipeline to avoid pipeline blockage and give the solidified material (feces, etc.) sufficient time to hydrolyze. A septic tank is a small treatment structure that separates domestic sewage into multiple compartments for sedimentation and anaerobic digestion.