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Tuesday 11 July 2017

Using activated biochar for greenhouse gas mitigation and industrial water treatment

Author
Joseph M. KimetuJosephine M. HillMaen HuseinJoule Bergerson and David B. Layzell (dlayzell@ucalgary.ca)
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Mitigation and Adaptation Strategies for Global Change, 2016, vol. 21, issue 5, pages 761-777
Abstract: Abstract This study explored the feasibility of using residual biomass to both mitigate greenhouse gas (GHG) emissions and remediate water contaminated by hydrocarbons. Using produced (process-affected) water from Canada’s oil sands operations as a case study, activated biochar (ACB) was found to have a higher affinity to organics than activated coal and removed 75 % of total organic carbon (TOC) from produced water in steam-assisted gravity drainage (SAGD) operations or 90 % of the TOC from synthetic tailings (ST) water sample. Up to 6 Tg dry biomass year−1 would be required to treat the waters associated with the 93 × 106-m3 of bitumen recovered per year. Landfilling the spent ACB and flaring any biogas produced were estimated to provide a greater GHG benefit than the combustion of the biochar + organics for heat to offset natural gas demand. Net costs for the ACB were about 13.84 $ m−3 bitumen for SAGD operations and 1.76 $ m−3 bitumen for mining operations. The values for mining operations justify further work to create a value chain that will integrate bioprocesses into the fossil fuel industry.
Keywords: Activated biocharBiocharLignocellulosic biomassOil sandsOrganicsProduced water (search for similar items in EconPapers)
Date: 2016
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