Patent DE-102006005859-A1 (DE)
Title: Plant for generating biogas from organic biodegradable material containing solid or liquid components such as liquid manure from agricultural enterprises, comprises biogas generation container having feed for degradable material
Inventor: EICHLER DIETER
IPC: C12M1/107
Filed: 2006-02-09
Abstract: A plant for generating biogas from organic biodegradable material containing solid or liquid components such as liquid manure from agricultural enterprises, comprises a biogas generation container (9) having a feed for the degradable material, a biogas collection zone (6) having a biogas outlet, a floatation separation unit having a micro-bubble generation unit (15) for separating off solid components from liquid components of the degradable material, and an agitator arranged interior of the biogas generation container for mixing the contents of the container. The plant for generating biogas from organic biodegradable material containing solid or liquid components such as liquid manure from agricultural enterprises, comprises a biogas generation container (9) having a feed for the degradable material, a biogas collection zone (6) having a biogas outlet, a floatation separation unit having a micro-bubble generation unit (15) for separating off the solid components from the liquid components of the degradable material, an agitator arranged interior of the biogas generation container for mixing the contents of the container, and a solid or liquid separator connected above the biogas generation container for separating solid components of the biodegradable material before introducing the material into the container. The floatation separation unit comprises a chamber region (14), which is delimited in the interior of the biogas generation container and essentially active in the direction of gravity. The chamber region has a closed bottom and an open upper end arranged below the liquid level of the biogas generation container. Clarified liquid from the chamber region and biogas from the biogas collection region, are supplied into the micro-bubble generation unit for charging the liquid with the gas. The micro-bubble generation unit is arranged outside of the biogas generation container. The outlet of the micro-bubble generation unit is connected to an inlet of the chamber region to recycle micro-bubble-forming clarified liquid to the chamber region. An inlet for the gas subjected clarified liquid, is arranged near the bottom of the delimited chamber area. The micro-bubble generation unit arranged at an inner half of the chamber region, comprises micro-porous ceramic substrate material, which is introducible under pressurized gas. The solid or liquid separator comprises a worm-press separator. The agitator comprises a guide tube to draw a biomass floating layer formed near the upper open end of the chamber area and arranged behind the agitator to separate the floating layer. An inlet of the solid/liquid separator is connected with a bottom side outlet of the biogas generation container, while a fluid outlet of the solid/liquid separator is connected with an inlet arranged near the opening end of the chamber area. Near the bottom of the chamber, an outlet for the clarified liquid from the chamber is provided. Independent claims are also included for the following: (1) generating biogas from organic biodegradable material containing solid or liquid components such as liquid manure from agricultural enterprises; and (2) a biogas generation container used in plant.