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BIOGAS PRODUCTION IN DAIRY CATTLE SYSTEMS, USING BATCH DIGESTERS WITH AND WITHOUT SOLIDS SEPARATION IN THE SUBSTRATES

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Academic year: 2019

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FIGURE 2. Flowchart of the collecting process and separation of solid manure used in the experiment
Table 1 shows the values for the mean values of total solids (TS), volatile solids (VS) and the  reductions obtained in the volatile solids contents of the substrates obtained after washing the stable  floors  (MAN-INN)  as  well  as  of  the  fractions  o
Figure 3 shows the variations in accumulated production, in % of biogas.
FIGURE 4.Average daily production of methane in batch digesters operated with manure of dairy  cows obtained after washing the stable floors (MAN-INN) and of the fractions obtained  after the solid separator SEP and SOL-RET) and after the sand decanter  (M

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