PLANT AND PROCESS FOR GENERATING BIOGAS FROM BIODEGRADABLE MATERIAL CONTAINING LIQUID AND SOLID COMPONENTS, IN PARTICULAR WASTE PRODUCTS, AND ALSO BIOGAS GENERATION CONTAINER FOR USE IN THE PLANT

摘要

A plant for generating biogas from organic biodegradable material containingliquid and solid components, such as waste products, in particular liquidmanure from agricultural enterprises, comprises a biogas generation container(9) having a feed for the degradable material and a biogas collection zone (6)having a biogas outlet, and a flotation separation unit having a microbubblegeneration unit (15) for separating off the solid components from the liquidcomponents of the degradable material. The flotation separation unit comprisesa chamber region (14) which is delimited in the interior of the biogasgeneration container and essentially active in the direction of gravity andhaving a closed bottom and an open upper end arranged below the liquid levelof the biogas generation container. Clarified liquid from the chamber regionand a gas, in particular the biogas from the biogas collection region, can befed to the microbubble generation unit for charging the liquid with gas. Theoutlet of the microbubble generation unit is connected to an inlet (18) of thechamber region in order to recycle microbubble-forming clarified liquid to thechamber region. Near the bottom of the chamber region, an outlet (116) forclarified liquid from the chamber region is provided. The flotation separationtakes place in the chamber region in countercurrent flow to the ascendingmicrobubbles.