Technique of determining the qualitative indicators of the products of fermentation of biogas installations
DOI:
https://doi.org/10.31548/energiya2019.04.091Abstract
Abstract. Improving the efficiency of a biogas plant is determined by the selection of components for uniformity and the degree of their preliminary grinding, which affects the amount of biogas obtained through the duration of the fermentation period.
To determine the qualitative characteristics of the products of fermentation, the method of sampling and extraction of the solid fraction from them is applied.
Technological process of receiving biogas needs to be carried out so that as a result of hashing of substrate with a new portion which arrives in digester, to receive a fermentation product with the optimum maintenance of a disperse phase. Frequency of hashing will depend on the speed of sedimentation of suspended particles of substrate.
Researches on determination of fractional composition of manure are conducted. ccording to their results, the equivalent particle diameter of the substrate was established. The permissible relative content of the dispersed medium was determined , at which the load of the fermentation area in the digester would be no less than the lower limit of optimality.
Maintaining the quality indicators of fermentation products within the limits of optimality will allow to increase the performance of the digester by 10-12 %. The time for which the relative content of the dispersed phase of the substrate will vary from to , represents the time of pauses between the cycles of mixing of the substrate, which will reduce the energy costs of biogas production.
Key words: anaerobic fermentation, digester, biogas installation, mixing frequency, volume concentration of substrate
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