A local urban redevelopment government agency has decided to develop a new facility with novel anaerobic digestion (AD) technology to convert food waste into biogas to generate electricity. The technology will reduce the polluting wastes and transform them into renewable energy for achieving a zero-waste economy. However, the panel is unsure which type of AD technology listed in Table 2 is suitable for the application. They engage your consultancy service to facilitate the choice of an AD technology. The fa cilitys energy generation target is 85 thousand IA egawatt-h ours (lAWh) per year.
Table 2: B ioga s Yield and Methane Content for Different Types of AD Technology
Type of AD Technology
AD1
AD2
B loges Yield Methane Content (mil lion N W/year) (%) 35 58% 16 55%
Write a technology report to explain and recommend which AD technology should be used to meet the energy generation target. Your report should include the following:
1. Provide a general background on anaerobic digestion (AD) technology for converting food waste into energy.
2. Explain the working principle o f AD technology.
3. Elaborate on at least THREE factors affecting AD technology.
4. Calculate the energy content of Wages produced in a day in kilowatt-hours (kWh) for both AD1 a ndAD2. (Assuming the energyvalue of methane is9.97 kWh/N m3)
5. Calculate the electricity generated for AD1 and AD2, and hence determine which AD technology could meet the energy target mentioned above. (Assuming the electricity efficiency is 45% of the power generator and the availability of the power generator is 8,400 hours per year)
