According to an embodiment, a food waste disposer includes a housing having an opening formed on one end thereof, and a door coupled by hinge to open or close the opening of the housing. The door includes a door lever configured to be insertable into a fixing groove provided adjacent to the opening of the housing, a holder lever coupled to the door lever and configured to rotate about a rotation shaft, a pulling member configured to transmit a physical external force applied from the outside to the holder lever such that the holder lever rotates about the rotation shaft, one end of the pulling member being connected to the holder lever, and an actuator configured to generate a force to rotate the holder lever about the rotation shaft, based on an electrical signal.

A sheet lining of plastic material for construction waste collecting container wherein it presents an average surface roughness (Ra) between 0.5 and 10 micrometers. A concrete waste collecting container including an inner surface lined with a permanent sheet lining of plastic material. A method of managing a set of concrete waste collecting containers implemented by a central server, including: real-time monitoring of a position and a filled or unfilled status of the set of concrete waste collecting containers using a GNSS module and accelerometer of each collecting container.