IMPROVEMENTS IN AND RELATING TO PROCESS APPARATUS

摘要

A process apparatus which may be used for biologically degrading waste material and which comprises a container having a peripheral channel 15 formed in an upper rim thereof. At least one closure member 18 has a downwardly projecting peripheral skirt 19 locating in said channel 15. The channel 15 has a liquid located therein to provide a gas impervious seal around the periphery of the closure member 18, in use.