Biogas | Organic fertilizer

Analysis Biogas and organic fertilizer

Basic packages

basic package 1

  • for vegetable raw materials (grass-, cornsilages, Gras-, Mais-, whole crop silages, total mixed ration, grain)
  • complete analysis inclusive C:N-ratio, Biogas- and methane-yield - by Baserga

Basic package 2

  • for organic fertilizer and digestate 
  • Determination of dry matter, org. dry matter, pH-value, total-N, NH4-N, C:N-ratio, Biogas- and residual gas yield 

Basic package 3

  • Determination of fertilizer value and biogas-/ residual gas yield of organic fertilizer, digestate, manure
  • analysis spectrum from basic package 2 plus Ca, P, Mg, K, S 

Package nitrate area

  • DM, total-N, NH4-N, P

Additional analyses

Additional package 1

  • volatile organic acids (FOS), carbonate buffer capacity (TAC)

Additional package 2

  • quantity elements Ca, P, Mg, K, S

Additional package 3

  • trace elements Co, Mo, Ni, Se

Additional package 4

  • heavy metals accordint to bio-waste ordinance
  • Pb, Cd, Cr, Cu, Ni, Hg, Zn - with aqua regi digestion

Additional package 5

  • heavy metals according to fertilizer ordinance 
  • As, Pb, Cd, Cr, Cr VI, Ni, Hg, Th, perfluorized tensides - with aqua regia digestion

Residual gas- and methane gas-potential

  • 25-60 days, 20°C, 37°C

Assessment of the greenhouse gas balance and statement on the efficiency of the degradation and recycling of the input materials in the plant.

Carboxylic acids

early detection of overacidification and prevention of process disturbances


Microbiological package

  • salmonella, e. coli, enterococcus
  • pursuant to VO (EG) Nr. 142/2011

single analyses

  • salmonella
  • salt content

Declaration of fertilizer

  • only in combination with at least basic package 3

Required if farm fertilizer is to be placed on the market or supplied to third parties. A fertilizer declaration is not required if the fertilizer is used on the company's own farm.

RAL- Quality Assurance

RAL- Quality Assurance is possible for following end products:


  • fermentation product 
  • NawaRo-fermentation product
  • compost
  • AS-humus
  • AS-fertilizaiton


New price list

Please note that a new pricelist for our analyses will apply at LKS mbH from 01.06.2023. We will be happy to provide you with these upon request.

Our biogas and organic fertilizer analytic

For continuous gas production, regular control of input materials (renewable raw materials, animal excrements, etc.) is essential. Even fluctuations in dry matter of 2 - 3 percent have a considerable effect on the digester load. The comparison of the expected gas yield, which is shown in our certificates, with the actual gas production enables you to make a realistic yield assessment.

During ongoing biogas process, changes should only be made slowly. In addition to gas yield and temperature control, regular examination of the fermentation substrate for the most important process parameters is strongly advised (pH, nitrogen, FOS, TAC, redox potential). This is the only way to detect process disturbances at an early stage.

You will find a large part of our analyses in the above headings and boxes. If you still cannot find the analysis you are looking for, please call us - we will be happy to advise you.

Dr. David Tokarski

Probenannahme u. Attestierung

Manager sample acceptance and attestation/Consultant for soil fertility and plant nutrition
+49 37206 87-194

Consulting and attestation

for chemical feedstuff analyses

+49 37206 87-140