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Method for the fermentation of ensilaged renewable raw materials

A technology of silage and raw materials, applied in the field of renewable raw materials, can solve the problems of biogas performance fluctuations, long reaction time, etc., and achieve the effects of improving performance quality, reducing investment costs, and shortening method time

Inactive Publication Date: 2010-02-10
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Disadvantages of the known technical solutions are relatively long reaction times and partly large fluctuations in the properties of the produced biogas

Method used

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  • Method for the fermentation of ensilaged renewable raw materials
  • Method for the fermentation of ensilaged renewable raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1000 kg of silage consisting of 60% corn and 40% rye whole plant silage (Roggen GPS) was fed into the purge reactor. Subsequently, 1000 liters of liquid consisting of industrial water (effluent from the sewage treatment plant) were added to the cleaning reactor. After filling with the liquid, the silage was set in motion for 10 minutes by means of a kneading ram. The washed silage was then allowed to dwell in the washing reactor for 5 minutes at which time 100% of the washing water was removed from the silage by squeezing the silage. Catch the rinse water that is squeezed out. It had a composition of 2.5% dry matter content and 50 g / l dissolved CSB, and it was added to the fermenter present in the subsequent process stage. The silage that will be washed and partially dehydrated is sent in the hydrolysis reactor, and the liquid fertilizer of 0 mass %, the activated sludge of the resident sewage treatment equipment of 15 mass % and the 50 mass % of the activated sludge ...

Embodiment 2

[0053] 1000 kg of silage consisting of 60% corn and 40% rye whole plant silage was fed into the purge reactor. Subsequently, 500 liters of liquid consisting of industrial water (effluent from the sewage treatment plant) were added to the cleaning reactor. The washed silage is then left in the washing reactor for 5 minutes, whereby the washing water permeates through the silage body due to gravity and collects at the bottom. The hydrated silage was remixed by emptying the entire container without further mechanical thorough agitation. The silage-water-mixture is fed via a conveying device to a screw press where the washing water is squeezed out. The dehydration resulted in about 800 liters of squeezed water having a dry matter content of 4.5% and 55 g / l of dissolved CSB. The squeezed water is all sent to the post-fermenter of the two-stage series device. The washed and partially dewatered silage was comminuted continuously by means of a planetary roller extruder, wherein the...

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Abstract

The invention relates to the fields of biochemistry and energy generation and relates to a method for the fermentation of ensilaged renewable raw materials that may be subsequently used in a biogas production facility and have improved properties due to the pretreatment according to the invention. The method according to the invention may be used in the monofermentation of renewable raw materialsand in co-fermentation with commercial fertilizers (for example, liquid manure) in agricultural biogas facilities or in co-fermentation with sewage in community sewage systems. The aim of the solutionaccording to the invention is to provide a method by which the total times for the production of biogas are reduced and a lower fluctuation in quality of the produced biogas is achieved. This aim isattained by a method in which ensilaged renewable raw materials are first washed and mechanically comminuted, then the washed and comminuted ensilaged renewable raw materials, from which at least partof the washing water has been removed, are subjected to a separate hydrolysis, after which the hydrolysis products are subjected to the known method for the production of biogas in fermenters.

Description

technical field [0001] The present invention relates to the field of biochemistry and the field of energy generation and to a method for fermenting renewable raw material of silage which is subsequently used in a biogas production plant and has improved properties. Can be used for single fermentation of renewable feedstock and co-fermentation with commercial fertilizers (eg liquid manure) in agricultural biogas plants, or co-fermentation with sewage sludge in residential sewage treatment plants. Background technique [0002] By making full use of the biochemical properties of anaerobic mixed populations of microorganisms, the conversion of biomass into energy-ready biogas can be realized industrially not only in agricultural biogas plants but also in digestion towers of residential sewage treatment plants. The process technology used here covers a very wide range with regard to the combination and number of fermenters as well as their connections, process temperature (mesoph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12M1/107
CPCC12M21/04Y02E50/343C12M23/58C12P5/023C12M45/02C12M45/03Y02E50/30Y02P20/582C12M1/107C12P5/02
Inventor 比约恩·施瓦茨布格哈特·法萨索尔安内洛雷·腓特烈埃伯哈德·腓特烈亚历山大·米夏埃利斯
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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