Abstract: An automatic waterless toilet system comprises a reusable bedpan implement for raising a patient and a disposable collapsible liner to collect human waste therein. The liner is a rigid tray or a flexible bag insertable into the bedpan implement from one side. The bedpan implement has a motorized slider sub-system for automatic engaging and pulling the liner into a working position inside the implement and aligning thereof with a central opening in the bedpan implement and under the patient. After collection of waste within the disposable liner, it is automatically sealed and ejected from the bedpan implement such that the caregiver is protected from having to see, smell or handle an open container with human waste. The liner is made collapsible with an air escape so as to minimize its volume upon compression. The invention may be used as an alternative sewer collection system.