| Title: | Anaerobic digestion of organic fraction from hydrothermal liquefied algae wastewater byproduct |
| Author(s): | Fernandez S; Srinivas K; Schmidt AJ; Swita MS; Ahring BK; |
| Address: | "Bioproducts, Sciences and Engineering Laboratory, Washington State University, Tri-Cities, 2710, Crimson Way, Richland, WA 99354, USA. Chemical and Biological Processes Development Group, Energy and Efficiency Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA. Bioproducts, Sciences and Engineering Laboratory, Washington State University, Tri-Cities, 2710, Crimson Way, Richland, WA 99354, USA; Biological Systems Engineering, L.J. Smith Hall, Washington State University, Pullman, WA 99164, USA; The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99163, USA. Electronic address: bka@wsu.edu" |
| DOI: | 10.1016/j.biortech.2017.09.030 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "The wastewater stream from hydrothermal liquefaction (HTL) process used in biofuel production, contains a large amounts of organic compounds where several can be regarded as environmentally hazardous and requires significant treatment before disposal. In this study, semi-continuous anaerobic digestion is used to degrade the organic fraction of wastewater streams from HTL of the algae Tetraselmis (AgTet) and Chlorella (AgChlr). Results indicated high methane yields at 20-30% (v/v) HTL wastewater together with clarified manure, producing 327.2mL/gVS(in) (or volatile solids in feed) for AgTet and 263.4mL/gVS(in) for AgChlr. There was a significant reduction in methane production at concentrations higher than 40% (v/v) HTL wastewater in the feed, possibly due to the accumulation of chloride salts or inhibitory compounds such as pyridines, piperidines and pyrrolidines. This was further confirmed by comparing COD, salt and the ammonia concentrations of the effluents after anaerobic digestion at different concentrations of wastewater in manure" |
| Keywords: | Anaerobiosis Biofuels *Bioreactors *Chlorella Manure Methane *Wastewater Anaerobic digestion Chlorella Hydrothermal liquefaction Testraselmis Wastewater treatment; |
| Notes: | "MedlineFernandez, Sebastian Srinivas, Keerthi Schmidt, Andrew J Swita, Marie S Ahring, Birgitte K eng England 2017/09/28 Bioresour Technol. 2018 Jan; 247:250-258. doi: 10.1016/j.biortech.2017.09.030. Epub 2017 Sep 6" |
