Quiz 2
A larger biogas settler is planned at a (semi-) centralised faecal sludge treatment plant (FSTP) as the first step in treating the faecal sludge before it undergoes further treatment using an anaerobic baffled reactor (ABR), anaerobic filter (AF), and planted gravel filter.
To start, a faecal sludge characterisation study was conducted, which included a BMP test. The results of this study are summarised in the table below.
| Indicator | Value | Unit |
| Quantity of faecal sludge | 20 | m3/d |
| Faecal sludge density | 1,000 | kg/m3 |
| TS | 1.4 | % |
| VS | 64 | %TS |
| BMP | 0.2 | m3biogas/ kgVS |
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Question 1 of 3
1. Question
How much biogas can be generated in m3/d?
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Question 2 of 3
2. Question
How many kWh of electrical energy could be generated with the biogas generator (1.5kW), consuming 1.1m3/h?
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Question 3 of 3
3. Question
Which is more energy efficient for public lighting: using electricity or biogas lamps? Let’s compare the consumption of a 60W biogas lamp that uses 0.07m3/h with an 8-hour lighting duration to the electricity usage.
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