Projekter pr. år
Abstract
Produced water (PW) generated worldwide has lately become an issue of environmental concern. PW has a complex composition and a suitable treatment at offshore oil and gas platforms is required to achieve zero harmful discharge into the sea. The feasibility of electrochemical oxidation, heat-activated persulfate and ozonation was investigated as PW pretreatment. For comparison purposes, a common oxidant dosage level of 5% and 10% treatment equivalent chemical oxygen demand(COD) removal were established. Aiming to access PW biodegradability, an assay for biological oxygen demand(BOD) for high salinity matrix was also developed as a tool to characterize treatment efficiency. Electrochemical oxidation was largely independent on the anode materials, and controlled by the applied charge passed through the system. Heat-activated persulfate reaction was time-consuming and dependent on activation temperature, as well as initial oxidant concentration. Both methods reduced COD and BOD without significantly improving PW biodegradability, probably due to by-products generation. Ozonation had the most promising results applying doses ranging from 3.5 to 151mgO3/L. The benzene in PW after ozonation reduced up to 71% alongside with> 70% toxicity reduction for tested doses. Ozonation also showed to marginally improve PW biodegradability, which underline the potential of ozone to facilitate a subsequent biological treatment.
Originalsprog | Engelsk |
---|---|
Tidsskrift | Process Safety and Environmental Protection |
Vol/bind | 160 |
Sider (fra-til) | 255-264 |
Antal sider | 10 |
ISSN | 0957-5820 |
DOI | |
Status | Udgivet - 2022 |
Emneord
- Offshore produced water
- Chemical oxidation process
- Electrochemical oxidation
- Ozonation
- Heat-activated persulfate
Projekter
- 1 Afsluttet
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Feasibility of oxidation of produced water as pre-treatment for eco-toxicity removal
Breinholt, L., Muff, J. & Andersen, H. R.
01/06/2020 → 31/03/2021
Projekter: Projekt › Forskning
Aktiviteter
- 1 Organisering af eller deltagelse i konference
-
DHRTC Technology Conference 2021
Jens Muff (Deltager)
16 nov. 2021 → 17 nov. 2021Aktivitet: Deltagelse i faglig begivenhed › Organisering af eller deltagelse i konference