Status quo, Part 2: burn trash is profitable now and probably still doable at $150 per barrel of oil. Oil is essential to mix with trash for the incineration process. The downside is that about 20% of the trash volume is converted into trash so every five years the pile that needs to be land-filled is as big as one year's worth of land-filled trash.
Other energy from trash: Collect methane from decommissioned trash land fills. This is a remote possibility for the Waimanalo Gulch and the power gain will likely be small.
Geothermal is a great option, very clean, but for the Big Island only. With all the volcanic activity, it makes little sense to burn oil on the Big Island for electricity generation or for other renewable energy installations.
Then there is a host of renewable energy technologies some of which have known risks, costs, reliability and effectiveness. Others are heavily dependent on subsidies to make their cost per mega-Watt (MW) competitive when oil costs less than $150/barrel. The mix that is worth investigating for feasibility, planning and costing in producing electric power includes:
- photovoltaic (PV) or solar,
- wind, various technologies,
- wave, various technologies,
- biomass, various technologies,
- nuclear, various sizes, configurations and location options,
- other less known technologies, some of which appropriate for small scale deployments.