Soluble organic compounds in oil shale sour water are degradable only after being adsorbed to combusted oil shale

Ho, Ngai Man, Sly, Lindsay and Clarke, William P. (2014) Soluble organic compounds in oil shale sour water are degradable only after being adsorbed to combusted oil shale. Fuel, 133 270-275. doi:10.1016/j.fuel.2014.04.095


Author Ho, Ngai Man
Sly, Lindsay
Clarke, William P.
Title Soluble organic compounds in oil shale sour water are degradable only after being adsorbed to combusted oil shale
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
1873-7153
Publication date 2014-10-01
Sub-type Article (original research)
DOI 10.1016/j.fuel.2014.04.095
Open Access Status
Volume 133
Start page 270
End page 275
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2015
Language eng
Abstract This study demonstrates that the degradation of the organics of oil shale processing wastewater is promoted by shale ash. The wastewater TOC was approximately 4800 mg/L with at least 40% being bio-refractory compounds. Sampling of effluent from a 1 m column packed with shale ash showed that over 96% of the TOC was removed at an influent flowrate of 40 L/m2/d. On-line CO2 measurements showed that 86 ± 2% of the TOC was biodegraded to CO2. Control experiments included a packed column with glass beads with no TOC adsorption capacity; and stirred sequencing batch reactors with and without 5-10% (w/w) shale ash suspensions. Less than 65% of the TOC was found degraded in the controls and neither extending the hydraulic retention time nor reducing the organic loading enhanced the TOC removal efficiency. The results suggest the optimum degradation environment for the wastewater is within a biofilm with shale ash as a substratum.
Keyword Biofilm
Biorefractory
Packed column
Shale
Wastewater Treatment
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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