Biogas Plant Data - Manure Treatment

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 Attached are the data sheets for the different biogas plants that were visited in Germany on June 6 - 8, 2006. The data sheets give an overview of biogas plants that utilise manure as feedstock. This type of summary was chosen to allow for an easy comparison between the different technologies. Each data sheet also has a section describing the technologies or approach that made that plant unique. Additional service providers have also been added to the list. Note that the cost of the individual plants should only be used as a guideline. Canadian cost structures can be very different and even the cost from German plant to German plant can vary considerably. The report should be used as a technology review. I have also added a data sheet for PlanEt. I had visited their plants on a previous occasion.

Pasteurisation step
The EU requires pasteurisation or sterilisation of organic food or food processing waste, if it is to be on agricultural land. This includes such feedstock as slaughter waste, food processing waste and expired packaged food. The pasteurisation requires that the substrate is heated to 70C for one hour. The heated material can then be directly put into the digester. Agricultural byproducts such as crop residuals or energy crops (corn silage) do not need to be pasteurised. Note, almost all “farm-scale” plants require no more than 1 hour of maintenance a day, mostly to fill feeder hopper and for a quick visible check. Exceptions are the Krieg & Fischer plant that, due to its size and industrial capacity, has two full time staff. The Lipp plant requires that the feeder hopper is filled once every two days!

Electricity feed-in tariffs for Germany
The Renewable Energy Law in Germany ensured the growth of the biogas sector because it guaranteed two key elements. First, it set a minimum price for the green electricity that was generated. This guaranteed a rate of return for the investors. The prices were guaranteed for a fixed period of time, so that the subsidies could not continue for an indeterminate period of time.The second element was the guaranteed access of green electricity to the grid. It required that the electricity companies create the infrastructure to any property where green electricity was produced (on the property itself, the owner assumed responsibility). The law set prices for wind energy, biogas and solar cell-based electricity generation. The additional costs generated by the guaranteed minimum prices were to be paid for by the consumers and not subsidised by the state. Hence, the electrical companies would divide the added costs among all consumers. The government regularly checks the books of the electrical companies to ensure fairness.The Renewable Energy Law in Germany was modified in 2004 with improvements for the biogas industry.


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For more information about the content of this document, contact Victor Cheng.
This document is maintained by Patti Breland.
This information published to the web on February 2, 2007.
Last Reviewed/Revised on February 3, 2011.