New BEKON Biogas technology
for dry fermentation in batch process (cured by various patents)
Dipl.-Phys.Ing. (FH) Peter Lutz
Managing Director
BEKON Energy Technologies GmbH & Co. KG
结婚答谢词
Dry fermentation process for biogas generation (1)
Process description of the BEKON Biogas Technology..2
Batch Method for Biogas Generation (3)
Low Process Energy Consumption (3)
High Gas Yield and Excellent Gas Quality (4)
Compact Design with Safety Rerves (4)
Computer Controlled Operation (5)
Heat and Power Generation (5)
Other Possibilities for the Utilisation of Biogas (5)
Further Utilisation of the Digested Organic Matter (6)
Advantages of dry fermentation (6)
Dry fermentation process for biogas generation
At the beginning of the 21st century a new market is opening up for the
u of biogas technology in the production electrical and thermal energy
英语怎么学from organic matter.
The technology of “dry fermentation” can generate energy from communal and agricultural organic matter / waste.
Up until now, biogas technology mainly concentrated on the ”wet fermentation” of agricultural and communal organic waste, while the recently patented BEKON dry fermentation process can produce methane
from organic matter with a high content of dry matter. This kind of energy production is environmentally sound and economically interesting, while also creating and curing employment.
A great potential for energy generation from organic matter is found in agricultural by-products and wastes, communal organic waste and cuttings from coppicing and other maintenance work in the countryside
and forests. With the dry fermentation process biogas with a high energy content is produced that can then be converted into electricity and heat
遵守规则的英文in block-type thermal power stations.
颧Instead of disposing of organic matter from agriculture or communal waste in other ways, dry fermentation offers a means of turning it into a valuable resource and extracting the highest possible benefit from it (in
the form of biogas, electricity, heat, compost and fertilizer). The high quality compost, which results from the process of dry fermentation, can
be ud as a valuable fertilizer for agricultural and horticultural purpos.
Process description of BEKON Biogas Technology
Batch Method for Biogas Generation
复课证明查验制度The BEKON dry fermentation process is a single-stage batch process for biogas generation from bio
mass with a high dry matter content.页岩气开采
The organic matter is inoculated with substrate that has already been fermented. It is then filled into the digester and fermented under airtight conditions. Continual inoculation with bacterial matter occurs through recirculation of percolation liquid, which is sprayed over the organic matter in the digester. No stirring of the organic matter is necessary during the dry fermentation process, as it is in conventional wet fermentation systems.
The temperature of the process and of the percolation liquid are regulated by a built-in floor heating system in the digester and a heat exchanger in the tank which acts as a rervoir for the percolation liquid.
The different stages of degradation (i.e. hydrolysis, acid and methane formation) take place in the same digester, which has a lot of advantages in comparison to other systems, where usually considerably more expen is involved in respect to the process itlf and in respect to the mechanical technology behind it. This in turn has an adver effect on process energy consumption and on maintenance costs.
ÎThe technology is characterid by its simple construction.
Organic matter with a high dry matter content can be methanized.骆驼祥子摘抄赏析
Low Process Energy Consumption
During the fermentation process, no further mixing, pumping or stirring is necessary inside the digester. Therefore, BEKON dry fermentation technology requires only a low input in respect to process and mechanical demands. In contrast, conventional liquid fermentation systems require a large amount of process energy during operation. The highly specialized and unique BEKON process technology of dry fermentation requires an extremely low energy input.
ÎDry fermentation has a low energy consumption compared to other systems.
High Gas Yield and Excellent Gas Quality
The gas yields from the dry-fermentation of agricultural substrates correspond to the specifications given by the Bavarian Institute for Agricultural Technology in Munich/Weihenstephan. They vary, depending on the substrate, from 100 m³/t for meadow grass (first cut) to up to 180 m³/t for maize sil
age. For organic wastes, gas yields are similar to tho of conventional liquid fermentation systems. The low sulphur and high methane contents in biogas from dry fermentation are particularly interesting features of this system.
ÎBiogas yield from the dry fermentation system is about the same as in liquid fermentation systems.
Compact Design with Safety Rerves
The digesters are made of gas-tight concrete and can be filled and emptied with a wheel loader or a front-end loader. The digesters are elongated and garage shaped, with a large gate at one end. After the biomass has been introduced, the gates are clod and shut gas-tight. The system is equipped with an especially developed safety device, preventing an explosive atmosphere from forming when the digester is opened for emptying and refilling.
ÎThanks to the high dry matter content of the substrate, the digesters feature a compact design.
Computer Controlled Operation
Via a computer controlled system the treated percolation liquid is sprayed repeatedly over the organic matter. When necessary (according to the calculations of a monitoring device) the same system will automatically add lime for pH-stabilisation or other substances for optimising the process.
Optimal process temperature is regulated by the temperature of the percolation liquid and the floor heating in the digester via heat exchangers. The biogas production can be regulated by adjusting temperature within the digester.
ÎThe dry fermentation plant can be operated and controlled through ur-defined, computerid process parameters.
Heat and Power Generation
The biogas is dried in a gas-processing chamber, where gas quality and volume are measured. It is then pumped through a gas-regulating device, with the necessary safety installations, into a combined heat and power unit. An especially designed biogas gas engine in the co-generation unit generates electricity. Some of the excess heat is ud to maintain optimum temperature in the digesters, but most is available for other us.
ÎBiogas is ud in a co-generation unit for the production of electricity and heat.
Other Possibilities for the Utilisation of Biogas A further interesting development in the u of biogas will be its upgrading and adaptation to natural gas standards, so that it can be ud in natural gas driven vehicles.
鱼腥草眼药水After upgrading the biogas produced, it would also be possible to feed it directly into the natural gas supply network. Specific quality standards for biogas as a substitute for natural gas have to be formulated by the operators of the gas supply network. In a few EU countries such strategies have already been successfully tested. In areas where the installation of a natural gas network is too expensive the installation of a local biogas supply network could become economically viable.
ÎBiogas can be utilized as a natural gas substitute in gas driven vehicles, or for feeding into the natural gas supply network.
