3. Results and discussion
3.1. Weekly biogas production in the successive stages of the
experiment
Fig. 2 shows the weekly biogas production measured during the
four experimental stages. The following discussion focuses on the
2nd stage (constant organic load, weeks 3–6) and the last one (progressive
organic load, weeks 11–18).
3.2. Operation of the digester at a constant organic load (weeks 3–6)
During this phase, 8.0 kg of raw screenings were introduced
into the digester every week, corresponding to a load of 2.0 kg of
dry solids and an average residence time of 4 weeks. Fig. 3 shows
the biogas production obtained, expressed in Normal liter (Nl)
per week, i.e. under normal pressure (1 atm) and temperature
(0 C) conditions. It can be seen that biogas production decreased
drastically from 488 (week 3) to 143 Nl/week (week 6), revealing
the installation of inhibitory conditions probably due to the
3. Results and discussion
3.1. Weekly biogas production in the successive stages of the
experiment
Fig. 2 shows the weekly biogas production measured during the
four experimental stages. The following discussion focuses on the
2nd stage (constant organic load, weeks 3–6) and the last one (progressive
organic load, weeks 11–18).
3.2. Operation of the digester at a constant organic load (weeks 3–6)
During this phase, 8.0 kg of raw screenings were introduced
into the digester every week, corresponding to a load of 2.0 kg of
dry solids and an average residence time of 4 weeks. Fig. 3 shows
the biogas production obtained, expressed in Normal liter (Nl)
per week, i.e. under normal pressure (1 atm) and temperature
(0 C) conditions. It can be seen that biogas production decreased
drastically from 488 (week 3) to 143 Nl/week (week 6), revealing
the installation of inhibitory conditions probably due to the
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3. Results and discussion
3.1. Weekly biogas production in the successive stages of the
experiment
Fig. 2 shows the weekly biogas production measured during the
four experimental stages. The following discussion focuses on the
2nd stage (constant organic load, weeks 3–6) and the last one (progressive
organic load, weeks 11–18).
3.2. Operation of the digester at a constant organic load (weeks 3–6)
During this phase, 8.0 kg of raw screenings were introduced
into the digester every week, corresponding to a load of 2.0 kg of
dry solids and an average residence time of 4 weeks. Fig. 3 shows
the biogas production obtained, expressed in Normal liter (Nl)
per week, i.e. under normal pressure (1 atm) and temperature
(0 C) conditions. It can be seen that biogas production decreased
drastically from 488 (week 3) to 143 Nl/week (week 6), revealing
the installation of inhibitory conditions probably due to the
การแปล กรุณารอสักครู่..
