Mechanical Decomposition of Substrates for Increase of the Biogas Yield
Besides encymes the mechanical decomposition of substrates is most widespread. We as biogas plant operators use mechanical decomposition of substrates as long as we operate
About the Sense of Decomposition Procedures
Many „new“ procedures to increase the biogas yield from the substrates are developed and propagated particularly in economically difficult times. The best known techniques
Sense and Necessity of the Micronutrient Addition
Micronutrients or trace elements (these are mostly heavy metals) are needed in all biogas plants. The micronutrients are the central atoms in the enzymes which
Acidification of the Digester
At the operation of biogas plants acidification of the digester is one of the most expensive problems. When the digester biology is acidotic, it can
TRGS 529 and Biogas Additives – Evaluating Helps Saving Money
The introduction of „Technical Rules for Hazardous Substances 529 (TRGS 529)“ in Germany earlier this year lead to several new provisions for operators of biogas
Analysis of the Supply with Micronutrients in Biogas Plants – Expensive and Useless?
The analysis of the micronutrient concentrations in the digester supplies no usable information about the level of supply of the digester biology. These costs can be saved. The use of individual mixtures makes no sense, as the level of supply cannot be sensefully detected. A safe micronutrient supply of the digester biology is only possible by the correct addition of a defined product adjusted to the growth of the bacteria population.
My Story With the Use of Micronutrients in Biogas Plants
We develop and pursue the use of micronutrients or essential trace elements since over 25 years. The experience shows, that micronutrients as Acinor 1000 lead to an improvement of the process stability in all plant types, also with the use of liquid manure. High loading rates are only feasible with the addition of micronutrients.
Selfheating and Cooling of Digesters
When I started constructing and commissioning the first high-loaded biogas digesters (digester load 8-10 kg oDM/cbm/d) in 2005, an unexpected phenomenon appeared – the digesters warmed up by themselves in summer without activated heating. The real problem was the too fast increase of temperature, leading to a breakdown of the biology. In a few weeks the planned digester temperature of 39 °C increased to 43 °C, and the digester biology suddenly became unstable.
The Influence of Temperature on the Biogas Production
The still common understanding assumes the existence of a mesophilic (35 – 40 °C) as well as a thermophilic (50 – 55 °C) temperature range
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