TY - GEN
T1 - Removal of bioactive contaminants from wastewater by hydrothermal liquefaction processes
AU - Pham, Mai
AU - Schideman, Lance
AU - Sharma, Brajendra Kumar
AU - Zhang, Yuanhui
N1 - Publisher Copyright:
© Environment Federation Technical Exhibition and Conference, WEFTEC 2014.All right reserved.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - The current study investigated the effects of hydrothermal liquefaction (HTL) operated under a range of operating conditions on the fate of bioactive contaminants (BACs) often present in wastewater sources. HPLC analysis of BACs before and after HTL treatment showed essentially complete removal of BACs in presence of biomass feedstocks when HTL was operated at 300°C and ≥30 min. Tracking 14C for two BACs showed that 60–79% of the carbon was transferred to the HTL raw oil product, and most of the rest was found in the aqueous product. High-efficiency transformation experiments showed complete deactivation of antibiotic resistant materials for all tested HTL conditions. Due to the high temperature and pressure of HTL process, BACs are broken down into a variety of organic compounds that are present in the aqueous HTL product. Experiment data showed that 51% and 96% of these compounds can be removed by algal bioreactor and catalytic hydrothermal gasification treatments, respectively. Thus, HTL can effectively destruct a wide variety of BACs and help to reduce or eliminate any negative impacts of these compounds on human health and natural ecosystems.
AB - The current study investigated the effects of hydrothermal liquefaction (HTL) operated under a range of operating conditions on the fate of bioactive contaminants (BACs) often present in wastewater sources. HPLC analysis of BACs before and after HTL treatment showed essentially complete removal of BACs in presence of biomass feedstocks when HTL was operated at 300°C and ≥30 min. Tracking 14C for two BACs showed that 60–79% of the carbon was transferred to the HTL raw oil product, and most of the rest was found in the aqueous product. High-efficiency transformation experiments showed complete deactivation of antibiotic resistant materials for all tested HTL conditions. Due to the high temperature and pressure of HTL process, BACs are broken down into a variety of organic compounds that are present in the aqueous HTL product. Experiment data showed that 51% and 96% of these compounds can be removed by algal bioreactor and catalytic hydrothermal gasification treatments, respectively. Thus, HTL can effectively destruct a wide variety of BACs and help to reduce or eliminate any negative impacts of these compounds on human health and natural ecosystems.
KW - Algae
KW - Antibiotic resistance
KW - Bio-wastes
KW - Bioactive contaminants (BACs)
KW - Biofuel
KW - Estrogenic compounds
KW - Hydrothermal liquefaction
KW - Spirulina
KW - Waste-to-energy
UR - http://www.scopus.com/inward/record.url?scp=85070595892&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070595892&partnerID=8YFLogxK
U2 - 10.2175/193864714815940532
DO - 10.2175/193864714815940532
M3 - Conference contribution
AN - SCOPUS:85070595892
T3 - 87th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2014
SP - 4729
EP - 4750
BT - 87th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2014
PB - Water Environment Federation
T2 - 87th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2014
Y2 - 27 September 2014 through 1 October 2014
ER -