I've read through your paper in detail and I note the following. (I may have missed some things of course)
1) You don't discuss anaerobic decomposition to methane in the ocean. Is it a risk? Outgassing may be immediate or by clathrate destabilisation. 2) You don't discuss pyrolysing the waste to char before sequestration. 3) You consider burying the waste, but you do not consider creating biochar and burying that to create terra preta 4) You reject the idea of burning crop residues and using CCS, but do not provide a quantitative analysis of the carbon content of biomass by % compared to other fuels, so it cannot be determined whether burning is relatively more efficient than for other fuels. 5) You do not directly consider the production of char by pyrolysis then onward transport of the fuel to be burned in sites suitable for CCS. It may be that thermal and industrial inefficiencies preclude this, but this cannot be assumed. Further, char is likely to be compatible with existing coal plant, when raw crop waste is not. 6) You do not consider anaerobic digestion of the crop waste to make methane gas for power generation or large-vehicle transport fuel. This technology is used extensively in the UK for food waste, albeit on an emergent scale. 7) You do not consider the alternative of storage of waste in the desert. If transported by rail to the desert, crop waste could dry naturally and then be sealed with plastic in bales. This is an obvious alternative destination for the waste. A --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
